(b) Answer the following Explain addition polymerization with example. 2. Give the difference between paint and varnish.

Transcription

1 Seat No.: Enrolment No. GUJARAT TECHNOLOGICAL UNIVERSITY Diploma Engineering Semester I/II Examination WINTER 2013 Subject code: Date: 20/12/2013 Subject Name: Applied Science - II (CHEMISTRY) Time: 10:30 TO 1:00 Total Marks: 70 Instructions: 1. Attempt five questions. 2. Make suitable assumptions wherever necessary. 3. Figures to the right indicate full marks. 4. Each question carry equal marks (14 marks) Q.1 (a) Answer the following. (Any Four) 8 1. Explain full meaning of 92 U 235 & 7 N Give molecular weight of CaCl 2 and MgCl Calculate the P H of 0.01 N NaOH solution. 4. Give the characteristics of lubricants. 5. What is ionic bond? Give one example of it. 6. Define- Acid number and Saponification number. (b) Answer the following Explain addition polymerization with example. 2. Give the difference between paint and varnish. Q.2 (a) What is Degree of ionization? Explain the factors affecting to the degree of ionization. (a) What is buffer solution? Give the types of buffer solution with suitable examples. Q.2 (b) What is covalent bond? Give the types of covalent bond and explain polar characteristics of covalent bond. (b) Calculate the temporary, permanent and total hardness of the water sample containing following salts- Ca(HCO 3 ) 2 = 16.2ppm, CaCl 2 = 33.3 ppm, MgCl 2 =9.5 ppm, MgSO 4 = 24.0 ppm Q.2 (c) Give the difference between hard water and soft water. 4 (c) Give the difference between thermo plastics and thermo setting plastics. 4 Q.3 (a) Explain- permutit process use for softening of hard water with chemical 5 reactions. (a) What is Hydrogen bond? Give the significance of hydrogen bond. 5 Q.3 (b) Describe- Vulcanization of rubber and give the uses of rubber. 5 1/3

2 (b) What is lubricant and lubrication? Explain the types of lubricant with suitable 5 examples. Q.3 (c) What is corrosion? Explain water line corrosion with neat sketch. 4 (c) What is insulating material? Give the types of insulating material with suitable examples. 4 Q.4 (a) Describe the construction, working and principal of electrochemical cell with chemical reaction. Give the function of salt bridge in galvanic cell. 7 Q.4 (b) Write- Aufbau s and Hund s principals. 4 (b) Draw the structures of Sulphur and Phosphorous. 4 Q.4 (c) What is ph? Give the importance of ph measurement in various fields. 3 (c) List the factors affecting to the rate of corrosion. 3 Q.5 Answer the following questions. (a) Describe the Construction and working of standard Hydrogen cell. 5 (b) Explain- Electroplating and Galvanizing. 5 (c) Describe P-type semi-conductors. 4 *************** gaujratai Anauvaad pa`.1 (A) naicao Aapaolaa pa`fnaaonaa jvaaba Aapaao. (kaoe pana caar) U 235 Anao 7 N 14 naao sampauna* Aqa* samajavaao. 2. CaCl 2 Anao MgCl 2 naao ANauBaar lakaao N NaOH naa Z<avaNanaI P H ganaao. 4. snaohkaonaa gaunaqamaao* jnaavaao. 5. Aayainak bamqa kaonao khovaaya? taonaum Aok }dahrna Aapaao. 6. vyaakyaa Aapaao- AoisaD AaMk Anao saabaukrna AaMk. (ba) naicao Aapaolaa pa`fnaaonaa jvaaba Aapaao yaaogasaila bahuqatktaa }dahrna saihta samajavaao. 2. taolai rmga Anao vaaina*sa vaccaonaao tafavata Aapaao. pa`.2 (A) AayanaIkrNa AMSa AoTlao SauM? AayanaIkrNa AMSa }par Asar krtaa pairbalao samajavaao. 5 Aqavaa (A) bafr Z<avaNa AoTlao SauM? bafr Z<avaNanaa pa`karao }dahrna saihta lakaao. 5 pa`.2 (ba) sahsamyaaojk bamqa AoTlao SauM? sahsamyaaojk bamqanaa pa`karao jnaavai, sahsamyaaojk bamqanaum Qa`uivaya laxana samajavaao. Aqavaa 2/3 5

3 (ba) paanainaa namaunaamaam xaaraonaum pa`maana naicao maujba Co, taao taonai xainak kiznataa, kayamai kiznataa Anao kula kiznataa SaaoQaao. Ca(HCO 3 ) 2 = 16.2 paipaiaoma, MgCl 2 = 9.5 paipaiaoma, CaCl 2 = 33.3 paipaiaoma, MgSO 4 = 24.0 paipaiaoma. 5 pa`.2 (k) kzina paanai Anao narma paanai vaccaonaao tafavata Aapaao. 4 Aqavaa (k) taapamaana saunamya(qamaao* plaaistk) Anao taapamaana sqaaipata (qamaao* saoitmga plaaistk ) vaccaonaao tafavata Aapaao. 4 pa`.3 (A) kzina paanainao narma banaavavaa maatonai parmyautit paqqaita rasaayanaik pa`ik`yaa AapaI 5 samajavaao. Aqavaa (A) haed<aojna bamqa kaonao khovaaya? haed<aojnanaum mahtva jnaavaao. 5 pa`.3 (ba) rbar naum valkonaikrna samajavai rbarnaa }payaaogaao jnaavaao. 5 Aqavaa (ba) snaohk Anao snaohna AoTlao SauM? snaohknaa pa`karao }dahrna AapaI samajavaao. 5 pa`.3 (k) xaarna AoTlao SauM? paanainai sapaati naicao qatau xaarna AakRita daori vana*vaao. 4 Aqavaa (k) ivasamvaahi padaqa* AoTlao SauM? ivasamvaahi padaqa*naa pa`karao }dahrna saihta lakaao. 4 pa`.4 (A) ivaqauta rasaayanaik kaoyanaao isaqqaamta, rcanaa Anao kaya* paqqaita rasaayanaik pa`ik`yaaaao AapaI samajavaao. ivaqauta rasaayanaik kaoyamaam xaar saotaunaum kaya* jnaavaao. 7 pa`.4 (ba) Aa}fbaa} Anao humd naa isaqqaamtaao lakaao. 4 Aqavaa (ba) salfr Anao faosfrsa ANau nai AakRita darao. 4 pa`.4 (k) ph AoTlao SauM? ivaivaqa xao~aomaam ph maapananai Agatyataa vana*vaao. 3 Aqavaa (k) xaarna }par Asar krtaa pairbalaonai yaadi Aapaao. 3 pa`.5 naicao Aapaolaa pa`fnaaonaa jvaaba Aapaao. (A) haed<aojna ivaqarta Qa`uvanaI rcanaa Anao kaya* paqqaita samajavaao. 5 (ba) elaokt<aoplaotimga Anao gaolvaonaaejimga samajavaao. 5 (k) P-pa`karnaa AQa*vaahkao samajavaao. 4 *************** 3/3

4 Seat No.: Enrolment No. Subject code: GUJARAT TECHNOLOGICAL UNIVERSITY Diploma Sem-II Examination July 2010 Subject Name: Applied Science II Date: 06 / /2010 Time: 03:00pm - :30pm Total Marks: 70 Instructions: 1. Attempt all questions. 2. Make suitable assumptions wherever necessary. 3. Figures to the right indicate full marks. 4. English version Authentic Q.1 Answer the Following : 14 (a) Give electronic configuration of 26 Fe and explain meaning of 92 U 235 (b) What do you mean by Buffer solution? State main uses of this solution. (c) Give standard conditions used to measure electrode potential. (d) Define the terms: (i) Neutralisation number or Acid value (ii) Saponification number (e) What is vulcanisation of rubber? State its advantages. (f) State main constituents of Paints. (g) Give shape of P orbitals. Q.2 (a) Answer the Following : (i) Define degree of ionization (ii) 100 ppm = degree clark. (iii) Define ph. (iv) Explain in short sheradizing. (v) Define Lubricant and Lubrication. (vi) Define Electron affinity. (vii) State any two characteristics of good refractory. (b) Answer the Following : (i) Give importance of Hydrogen Bond. (ii) Explain Oxidation and Reduction process with suitable example. (b) Answer the Following : (i) Give differences between Paint and Varnish. (ii) What is Electrolysis? Explain Electrolysis of CuSo 4 Solution. Q.3 Answer the Following : (a) Derive the equation of Ionic Constant for weak acid. (b) Calculate ph of M H 2 SO 4 (c) Explain Electrotyping. Q.3 Answer the Following : (a) Write short note on N Type semiconductor. (b) Calculate ph of 10-4 M NaOH. (c) Explain Galvanising and Metal Clading. Q.4 Answer the Following : (a) Explain Construction & working of Electrochemical cell. (b) Explain Chlorination of water. (c) State properties and uses of Glass wool and Thermo Cole. 1

5 Q. 4 Answer the Following : (a) What is Polymerisation? Explain Condesation Polymerisation with suitable example. (b) Give Differences between Thermoplastics & Thermosetting Plastics. (c) (i) What type of Lubricant you will select for cutting tools. (ii) State only main Additives of Lubricants. Q.5 Answer the Following : (a) Explain Ion Exchange Method for Softening of Hard water. (b) Write Formula, Properties & Uses of following materials: (i) Polyvinyl Chloride(PVC) (ii) Neoprene rubber (c) Following salts are dissolved in a sample of water. Calculate its total hardness in French degree: Mg(HCO 3 ) 2 = 1.46 mg/ltr MgCl 2 = 19.0 mg/ltr Mg SO 4 = 6.0 mg/ltr Q.5 Answer the Following : (a) List the effects of hard water when it is used in boiler. Explain scale & sludge formation and its prevention. (b) Define Covalent Bond. Explain bond formation in case of CCl 4. (c) Ionic constant (Ka) of 0.01 M CH 3 COOH solution is Calculate concentration of H 3 O +. Q.1 14 (a) 26Fe >,[S8=MGG\] A\WFZ6 H6FJM VG[ 92 U 235 GM ;\5"}6 VY",BMP (b) AOZ N=FJ6 V[8,[ X]\m AOZ N=FJ6GL D]bI p5imlutfvm H6FJMP (c) >,[S8=M0 5M8MlgXI, DF5JF DF8[GL 5 DFl6T XZTM H6FJMP (d) jifbif VF5M (i) G8:YLSZ6 VF\S VYJF V[l;0 D}<I (ii) ;FA]SZ6 VF\S (e) ZaAZG\] J<S[GF>h[XG V[8,[ X]\m T[GF OFINFVM H6FJMP (f) 5[>g8DF\ VFJ[,F D]?I 38SMGF GFD H6FJM (g) P S1FSMGL VFS'lT NMZMP Q.2 GLR[GF HJFA,BM (a) (i) VFIGLSZ6 V\XGL jifbif VF5MP (ii) 100 ppm = l0u L S,F"SP (iii) ph GL jifbif VF5MP (iv) l;z[0f>hl\u 5 ls'if 8}\SDF\ H6FJMP (v) :G[CS VG[ :G[CGGL jifbif VF5MP (vi) >,[S8=MG A\W]TFGL jifbif VF5MP (b) (i) CF>0=MHG A\WG\] DCtJ ;DHFJMP (ii) VMlS;0[XG VG[ lz0sxg VW"5 ls'if pnfcz6 ;lct ;DHFJMP VYJF (b) GLR[GF HJFA VF5Mo (i) 5[>g8 VG[ JFlG"X JrR[GF TOFJTGF D]bI D]NFVM H6FJMP (ii) ljw]tljefhg V[8,[ X\]m CuSo 4 GF N=FJ6G\] ljw]tljefhg ;DHFJMP Q.3 GLR[GF HJFA,BM (a) lga"/ V[l;0 DF8[ VFIlGS VR/F\SG\] ;}+ TFZJMP (b) of M H 2 SO 4 N=FJ6GL ph XMWMP (c) ;DHFJM o >,[S8=M8F>5L\U VYJF 2

6 Q.3 Q.4 Q. 4 Q.5 Q.5 (a) N 5 SFZGF VW"JFCS 5Z 8\}S GM\W,BMP (b) 10-4 M NaOH N=FJ6GL ph XMWMP (c) ;DHFJMo U[<J[GF>lh\U VG[ D[8, S,[l0\U (a) ljw}tzf;fil6s SMQF V[8,[ X\]m T[GL ZRGF VG[ SFI" ;DHFJMP (b) 5F6LGF S,MZLG[XG ljx[ ;DHFJMP (c) u,f;j], VG[ YDM"SM, GF U]6WDM" VG[ p5imum H6FJFP VYJF (a) AC]38STF V[8,[ X\]m ;\WGG AC]W8STF IMuI pnfcz6 J0[ ;DHFJMP (b) TF5;]GdI %,Fl:8S VG[ TF5:YFl5T %,Fl:8S JrR[ TOFJTGF D]bI D]NFVM H6FJMP (c) (i) S8L\U 8]<; DF8[ TD[ SIF 5 SFZGF :G[CSGL 5\;NUL SZXMm (ii) :G[CSDF\ pd[zjfdf\ VFJTF IMUtDSMGF\ GFD H6FJM (a) Sl9G 5F6LG[ GZD AGFJJF DF8[GL VFIG v ljlgdi 5wWlT ;DHFJMP (b) GLR[ NXF"J[,F 5NFYM"GF ZF;FIl6S ;]+4 U]6WD" VG[ p5imum H6FJMP (i) 5Ml,lJGF>, S,MZF>0 (PVC) (ii) lgim5 LG ZAZP (c) 5F6LGF V[S GD}GFDF\ GLR[ NXF"jIF 5 DF6GF 1FFZ VMU/[,F K[P T[GL S], Sl9GTF O \[R l0u LDF\ D[/JMP Mg(HCO 3 ) 2 = 1.46 mg/ltr MgCl 2 = 19.0 mg/ltr Mg SO 4 = 6.0 mg/ltr VYJF (a) AM>,ZDF\ Sl9G 5F6L JF5ZTF\ pnejtl D]xS[,LVM H6FJMP KFZL VG[ VJD,G\] lgdf"6 VG[ T[G[ V8SF JJFGF p5fim H6FJMP (b) ;C;\IMHS A\WGL jifbif VF5MP CCl 4. DF\ A\WG\] lgdf"6 ;DHFJMP (c) 0.01 M CH 3 COOH GM VFIlGS VR/F\S 10-4 K[P TM H 3 O + VFIGGL ;F\N=TF U6MP ********** 3

7 Seat No.: Enrolment No. GUJARAT TECHNOLOGICAL UNIVERSITY Diploma Sem-II examination June 2009 Date: 23 / 06 / 2009 Subject code: Subject ame: Applied Science-II (Chemistry) Time: 10:30am-1:00pm Total Marks: 70 Instructions: 1. Attempt all questions. 2. Make suitable assumptions wherever necessary. 3. Figures to the right indicate full marks. Q.1 (a) Answer the following. 1 Differentiate orbit and orbital 2 Explain the factors affecting the degree of Ionization. (b) Answer the following. 1 What is corrosion? Explain the mechanism of atmospheric corrosion. 2 Explain demineralization method for making soft water with figure. Write equations evolved in it. (c) Answer the following. 1 Define : (I) Flash point (II) Neutralization number 2 Define: oil point. Write the main constituents of it. Q.2 (a) Fill in the blanks. 1 Molecular weight of Platinum ( 78 Pt 191 ) = 2 ph of pure water is 3 A transparent homogeneous liquid made by dissolving resins into drying oil is known as 4 In pitting corrosion area of cathode is than that of anode ppm = degree clerk. 6 For measurement of Pensky Marten apparatus. 7 is used in vulcanization of Rubber. (b) Answer the following 1 Explain the problems occur due to hard water used in boiler. Give its remedies. 2 Write short note on Redwood viscometer. 3 Explain structures of bakelite and Nylon 6,6. Write their usage. (b) Answer the following 1 Explain the structure of molecular solids. Draw sketches of sulphur and phosphorus molecules. 2 Write short notes on: Electroplating and Electrotyping. 3 Explain the construction of Electrochemical cell. Q.3 (a) Write Auf Bau principle. Give electronic configuration of (b) (1) 16 S (2) 17 Co (3) 26Fe What is buffer solution? Give its types and Explain any three applications of buffer solutions

8 (c) A sample of hard water gave on analysis the following results. 1 Ca(HCO 3 ) 2 = 8.1 mg / L 2 Mg(HCO 3 ) 2 = 7.3 mg / L 3 CaSO 4 = 13.6 mg / L 4 MgCl 2 = 9.5 mg / L Atomic weight: H = 1, C = 12, O = 16, Mg = 24, Ca = 40, S = 32, Cl = 35.5 Q.3 (a) What is half cell. Explain construction and working of standard hydrogen half cell. (b) Define: (1) Lubrication (2) Lubricant. Explain fluid film lubrication. (c) What is polymerization? Give its types. Explain any one of them. Q.4 (a) Give meaning of 11 Na 23, 17 Cl 35, 25 Mn 55, 92 U 235 (b) Define: ph. Calculate the ph of M H 2 SO 4 solution. [log 4 = ] (c) Explain factors that affect the rate of corrosion. Q. 4 (a) Explain permutit method. (b) Write about selection of lubricants for 1 Cutting tools 2 Steam turbine (c) Write difference between thermoplastics and thermo setting plastic. Q.5 (a) What is insulating material? Give their ideal characteristics. Write about properties of Glass-Wool and thermo Cole. (b) What are the additives? Write their purpose. (c) Explain chlorination of water by bleaching powder. Q.5 (a) Explain Galvanizing and Tinning of metals. (b) Write difference between metallic conductors and solutions of electrolytes. (c) Explain formation of Hydrogen bond with example. Write its types and significance. : : :. 3 :. :. Q.1. ( ) ( ) ( )?. ( ) -.. 2

9 ( ).-( ) ( ) ( ) -( ),. Q.2. ( ) ( ) ( ) ( PT ) ph= ( ) ( ) = ( ) ( ) Q-2. ( ). ( ). 02 ( )., ( ). ( ). ( ).( ) ( ) 02 ( ). 02 Q-3 ( )... (1)S 16 (2)Co 17 (3)Fe ( )?. ( ). (1)Ca(Hco 3 ) 2= 8.1. / (2)Mg(Hco 3 ) 2 =7.3. / (2)Caso 4=13.6. / (3)Mg Cl 2 =9.5. / [ =H=1,C=12, O=16,Mg= 24, Ca=40.S=32,Cl=35.5],. 3

10 Q.3 ( )?. ( ) (1) (2).. ( )?. Q.4 ( ). (1) 11 Na 23 (2) 17 Cl 35 (3) 25 Mn 55 (4) 92 U 238. ( ) PH H 2 So 4 PH. [Log 10 4=0.6021] ( ). Q.4 ( ). ( ). (1) (2) ( ). Q.5 ( )?.. ( )?. ( ). Q.5 ( ). ( ). ( ).. ************** 4

11 Seat No.: Enrolment No. GUJARAT TECHNOLOGICAL UNIVERSITY Diploma Sem-II Remedial Examination September 2009 Subject code: Subject Name: App. Sci. II Date: 18 / 09 / 2009 Time: 03:00pm- :30pm Total Marks: 70 Instructions: 1. Attempt all questions. 2. Make suitable assumptions wherever necessary. 3. Figures to the right indicate full marks. 4. English version Authentic Q.1 Answer the following questions. (a) Give the electronic configuration of (1) 26 Fe (2) 14 Si (3) 11 Na (4) 20 Ca (b) Write the industrial applications of electrolytes. (c) Calculate the ph of 0.0 M HCl solution. [ log 5 = ] Q.2 Answer the following questions. (a) Filling the blanks. (1) Silica and fire clay are the example of Refractory. (2) A heating process of added sulpher in Natural rubber is. (3) impurities added Ge or Si is know as P-type semiconductor. (4) ph of acid is less than and that of base is more than. (5) In pitting corrosion area of cathode is than area of anode. (6) Galvanizing is coating. (7) Mg(HCO 3 ) 2 is produced hardness in water. (b) (1) Define: (i) Fire point (ii) Drop point (iii) Saponification number (2) Give the example of basic refractories. 03 (b) (1) Define: (i) orbital (ii) hard water (iii) polymer (2) Write the applications of buffer solutions 03 Q.3 Answer the following questions. (a) Explain Auf Bau principle. (b) Write only the names of factors affecting the degree of ionization. (c) What is Electro chemical series? State importance of it. Q.3 Answer the following questions. (a) Write the bad effect of using hard water in boiler. (b) Explain boundary lubrication with diagram. (c) Classify refractories. Give examples of each. 1

12 \\ \\ Q.4 Answer the following questions. (a) Explain bond formation in NaCl. (b) Explain the atmospheric corrosion. (c) Write a short note on pitting corrosion. Q. 4 Answer the following questions. (a) Distinguish between Thermoplastic and Thermosetting plastic. (b) Explain the addition polymerization with proper example. (c) Give classification of lubricant with suitable example. Q.5 Answer the following questions. (a) A sample of hard water gives in the following result. Calculate temporary hardness, permanent hardness and total hardness. Ca(HCO 3 ) 2 = 8.1 mg / L, CaCl 2 = 11.1 mg / L, Mg(HCO 3 ) 2 = 29.2 mg / L, MgCl 2 = 47.5 mg / L, MgSO 4 = 6.0 mg / L, CaSO 4 = 6.8 mg / L (b) Explain fluid film lubrication. (c) State the constituents of oil paints. Q.5 Answer the following questions. (a) Explain the types of H bond with suitable example. (b) Write a short note on (1) Electro refining (2) Electro typing (c) Explain the construction and working of electro chemical cell. 5 \ \`Gv! 5 \ \`G `GvZ GLR[GF 5`GF[GF HJFA VF5F[ V GL[RGFG\.,[S8=,GLS A\WFZ6 VF5F[ (1) 26 Fe (2) 14 Si (3) 11 Na (4) 20 Ca A ljw]t ljefhif[gf[ VF{WF[ULS p5if[u,bf[ S 0.0 M Hcl GF N FJ6GL Ph U6M slog 5=0.6990) V BF,L HuIF 5\]ZF[! Z[TL VG[ VluGHLT DF8LV[ PPPPPPPPPPPPPPPP pqdf pnfcz6 K[P Z S]NZTL ZAZDF\ U\WS pd[zl UZD SZJFGL 5wWlTG[ PPPPPPPPPPPPPPPP SC[ K[P # Ge S[ Si DF\ PPPPPPPPPPPPPPPGL VX]lwWVF[ pd[zjfyl P 5 SFZGF[ VW"JFCS AG[ K[P $ V[;L0 PH PPPPPPPPYL VF[KL VG[ A[.HGL PH PPPPPPPPPPPPPYL JW] CF[I K[P 5 5L8L\U 1FFZ6DF\ V[GF[0LS lj:tfz S\YF[0LS lj:tfz SZTF PPPPPPPPPPPPPPP CF[I K[P & U[<J[ GF.hL\U PPPPPPPPPPPPPPPPPP G]\ VFJZ6 K[P * Mg(HCO 3 ) 2 5F6LGL PPPPPPPPPPPPPPPS9LGTF pt5gg SZ[ K[P A s!f jifbif VF5F[P 03 VP VFU lagn] AP Z[,F lagn] SP ;FA]GLSZ6 V\S szf A[.hLS pqdf ;CGF pnfcz6m VF5F[P A VYJF s!f jifbif VF5F[P 03 VP S1FS AP ;bt 5F6L #P AC]W8S szf AOZ N FJ6GL p5if[ultf,bf[p 2

13 5 `Gv# 5 `Gv# 5 `Gv$ 5 `Gv$ 5 `Gv5 5 `Gv5 GL[RGF 5 `GF[GF pttz VF5F[P V VFpO AFp GF[ l;wwf\t ;DHFJF[P A VFIGLSZ6 V\X p5z V;Z SZTF 5lZA/M,BF[P S ljw]t Z;FI6 z[6l V[8,[ X]\ m T[GL VUtITF,BF[P VYJF GL[RGF 5 `GF[GF pttz VF5F[P V ;BT 5F6LYL YTL BZFA V;ZF[,BF[P A ;LDFJTL" :G[CG GL VFS'lT ;lct ;DHFJF[P S pqdf;cg]\ JUL"SZ6 pnfcz6 ;lct SZF[P GL[RGF 5 `GF[GF pttz VF5F[P V Nacl A\W ZRGFVF[ ;DHFJF[P A JFTFZ6YL YT]\ 1FFZ6 ;DHFJF[P S 5L8L\U 1FFZ6 p5z 8}\SGF[\W,BF[P VYJF GL[RGF 5 `GF[GF pttz VF5F[P V YDM";[\8L\U VG[ YDM"%,F:8LS JrR[GF[ TOFJT,BF[P A IF[UXL, AC]W8STF IF[uI pnfcz6 ;lct ;DHFJF[P S :G[CSG]\ JUL"SZ6 IF[uI pnfcz6 ;lct ;DHFJF[P V GL[RGF 5 `GF[GF pttz VF5F[P ;BT 5F6LGF V[S GD]GFG]\ 5lZ6FD GLR[ D]HA K[P TF[ T[GL :YF. S9LGTF V:YF. S9LGTF TYF S], S9LGTF U6F[P Ca(HCO 3 ) 2 = 8.1 mg / L, CaCl 2 = 11.1 mg / L, Mg(HCO 3 ) 2 = 29.2 mg / L, MgCl 2 = 47.5 mg / L, MgSO 4 = 6.0 mg / L, CaSO 4 = 6.8 mg / L A TZ, 50 :G[CG ;DHFJF[P S Z\UGF W8SF[ H6FJF[P VYJF GL[RGF 5 `GF[GF pttz VF5F[P V H A\WGF 5 SFZ pnfcz6 ;lct ;DHFJF[P A 8}\SGF[\W,BF[P!P WFT] X]lwWSZ6 ZP.,[S8=M 8F.5L\U S ljh Z;FIl6S ;[,GL ZRGF VG[ SFIF["H6FJF[P ********** 3

14 Seat No.: Enrolment No. GUJARAT TECHNOLOGICAL UNIVERSITY Diploma Semester II Remedial Examination December Subject code: Subject Name: Applied Science-II Date: 13 /12 /2010 Time: am pm Total Marks: 70 Instructions: 1. Attempt all questions. 2. Make suitable assumptions wherever necessary. 3. Figures to the right indicate full marks. Q.1 (a) Explain auf-bau principle and give electronic configuration of following element. (i) 26 Fe (ii)14 Si (b) Write the name of the salts producing hardness of water and calculate the ph of 0.0N H2so4 solution. (c) Define: (i) Fire point (ii) safonification no. (iii) Ionization energy (iv) electron affinity Q.2 (a) (i) Differentiate between orbit and orbital. (ii) state the properties of insulating materials. (b) Define and explain electro chemical cell with construction and working. (b) Write the type of chemical bond and explain Ionic bond. Q.3 (a) Define electro chemical series and importance of electro chemical series in understanding the corrosion of metals. (b) Explain in brief ph and its importance in various field. (c) Define Degree of ionization and explain what factor affect on Degree of ionization. Q.3 (a) Explain buffer solution,give types of buffer solution and its importance. (b) Write short note on : (i)pitting corrosion (ii) electro platting (c) Write short note on : N-type semi conductors. Q.4 (a) Explain in brief ion exchange process. (b) List the effect of hard water when used in boiler and explain the reason formation of scale and sludge and its prevention. (c) A sample of water on analysis gives the following results. Calculate temporary hardness, permanent hardness, total hardness. Mg(HCO3)2 =7.3 mg/lit. CaSO4 = 27.2 mg/lit. Ca(HCO3)2 =81 mg/lit. MgCl2 = 19.0 mg/lit. Q. 4 (a) Explain three method of express the hardness of water. (b) Define lubrication and give the types of lubrication and explain fluid film lubrication. (c) What properties will you consider while selecting a lubricant for (i)cutting tools (ii) gears 1

15 Q.5 (a) Explain polymerization with suitable example. (b) What is paints? Explain constituents(ingredient) of paints and their function. (c) Distinguish between thermo plastic polymer and thermo setting polymer. Q.5 (a) Define adhesive and give their types with suitable example. (b) Write short note on : (i)refractory (ii) vulcanization (c) Distinguish between paint and varnish 5 `Gv! V VFpOAFp GM l;wwf\t ;DHFJL GLR[GF TtJMGL.,[S8=MGLS ZRGF,BMP s!f 26 Fe szf 14 Si A 5F6LDF\ Sl9GTF pt5gg SZTF\ 1FFZMGF GFD,BMP VG[0.0N H2so4 GF - FJ6GL 5LV[R XMWMP S jifbif VF5MP s!f VFUlAN]\ szf ;FA]GLSZ6 VF\S s#f VFIGLSZ6 XlST s$f.,[s8=mga\w]tf 5 `GvZ V s!ftofjt VF5M o S1FF VG[ S1FS szf VJFCS 5NFY"GF U]6WDM" H6FJMP A JLH ZF;FIl6S SMQFGL jifbif VF5L T[G]\ A\WFZ6 VG[ SFI" ;DHFJMP VYJF A ZF;FIl6S A\WGF 5 SFZ H6FJL VFIMGLS A\W ;DHFJMP 5 `Gv# V JLH ZF;FIl6S z[6lgl jifbif VF5L WFT] 1FFZ6DF\ T[G]\ X]\ DCtJ K[ T[ ;DHFJMP A 5L V[R ljx[ 8}\SDF\ ;DHFJL T[G]\ H]NF H]NF 1F[+MDF\ DCtJ ;DHFJMP S VFIGLSZ6 V\XGL jifbif VF5L SIF SIF 5ZLA/M VFIGLSZ6 V\XG[ V;Z SZ[ K[ T[ ;DHFJMP VYJF 5 `Gv# V AOZ - FJ6GL jifbif VF5L T[GF 5 SFZ VG[ DCtJ ;DHFJMP A 8}\SGM\W,BMP s!f 5L8L\U 1FFZ6 szf.,[s8=m%,[8l\u S 8}\SGM\W,BMP V[Gv8F.5 VW"JFCS 5 `Gv$ V VFIG V[1FR[\H 5wWlT ljx[ 8}\SDF\ ;DHFJMP A Sl9G 5F6LGF AM.,ZDF\ p5imuyl pt5gg YTL V;ZM H6FJMP :S[, VG[ :,h pt5gg YJFGF SFZ6M VG[ ZMSJF DF8[GF p5fi,bmp S V[S 5F6LGF GD}GFGM 5'yYSZ6 SZTF\ GLR[ D]HAGF 5lZ6FD D/[ K[P TM 5F6LGL 1Fl6S S9LGTF4SFIDL S9LGTF VG[ S], S9LGTF XMWMP Mg(HCO3)2 =7.3 mg/lit. CaSO4 = 27.2 mg/lit. Ca(HCO3)2 =81 mg/lit. MgCl2 = 19.0 mg/lit. VYJF 5 `Gv$ V 5F6LGL S9LGTFG[ NXF"JJFGL +6 ZLTM ;DHFJMP A :G[CGGL jifbif VF5L :G[CGGF 5 SFZ H6FJL TZ,50 :G[CG ;DHFJMP S s!fs8l\u 8]<; VG[ szfuli;" DF8[ TD[ SIF 5 SFZGF U]6WDM" JF/F :G[CSGM p5imu SZXMP 5 `Gv5 V IMuI pnfcz6 VF5L AC],LSZ6GL 5 ls IF ;DHFJMP A 5[.g8 X]\ K[ m 5[.g8GF A\WFZ6 s38smf VG[ T[VMGF SFIM" H6FJMP S TOFJT VF5MP o YDM"%,F:8LS 5M,LDZ VG[ YDM";[8L\U 5M,LDZ VYJF 5 `Gv5 V VF;\HSM sv[0[;ljfgl jifbif VF5L T[DGF IMuI pnfcz6 ;FY[ 5 SFZ H6FJMP A 8}\SGM\W,BMP s!f ZLOZ[S8ZL szf J<S[GF.h[XG S TOFJT VF5M o 5[.g8 VG[ JFlG"; ********** 2

16 Seat No.: Enrolment No. Date:23/06/2011 GUJARAT TECHNOLOGICAL UNIVERSITY Diploma Engineering Sem. II nd - Examination June/July Subject code: Subject Name: Applied science-ii [Chemistry] Instructions: 1. Attempt all questions. 2. Make suitable assumptions wherever necessary. 3. Figures to the right indicate full marks. 4. English Version Authentic. Time: 02:30 pm :00 pm Total Marks: 70 Q.1 (a) Answer The following question.(any three) (1) Draw the shape of S & P orbital. (2) Give electronic configuration of 17 Cl & 26Fe. (3) Explain the full meaning of 11 Na 23 & 92 U 235. (4) Write the industrial application of electrolyte. (b) Filling the blanks : (1) PH + POH =. (2) 100 ppm = degree clerk. (3) is used in vulcanization of Rubber. (4) Galvenizing is coating. (5) For measurement of pensky marten Apparatus is used. (6) Molecular weight of ( 78 pt 191 ) =. (7) Grephite is lubricant. Q.2 (a) (b) (b) Answer the following question. (1) Explain Auf-bau principle. (2) Define :Ionisation energy & Electron effinity. (3) Explain meaning of Atomic Number & Mass Number. Answer the following question. (1) Write the name of factors effecting the degree of Ionisation. (2) Calculate PH of 0.2 M HCl. (3) What is Buffer solution.explain it s types with suitable example Answer the following question. (1) Explain Ionic bond formation with suitable example. (2) Give the characteristics of covalent compound. (3) Write Importance of Hydrogen bond. Q.3 (a) Answer the following question. (1) Explain construction and working of Electrochemical cell. (2) Explain factors that effect the rate of corrosion. (3) Which are different methods used to protect Metals. 1

17 (b) (1) Explain in brief PH and its importance. (2) What is N- type semiconductor. (3) Write standard conditions for Hydrogen electrode. Q.3 (a) Answer the following question. (1) Give the name & formula of salt causes permanent hardness. (2) Write chemical equation involve in Zeolite method. (3) Explain Ion exchange process. (b) (1) State the various systems to express the hardness of water. (2) Sample of water contain following data.calculate its Temporary,permanent and Total hardness. Ca(HCO 3 ) 2 = 81mg/lit Mg(HCO 3 ) 2 =16.2 mg/lit CaCl 2 =77.7mg/lit, MgCl 2 =19.0mg/lit, CaSO 4 =6.8mg/lit, MgSO4 =6.0mg/lit. Q.4 (a) Answer the following question. (1) Discuss different methods of purification of water. (2) Write effect of hard water when it is use in Boiler. (b) Answer the following question. (1) Define: Lubricant. Give the Functions of Lubricant. (2) Explain Boundary Lubrication. Q.4 (a) Answer the following question. (1) Give the classification of Lubricants. (2) Define :Flash point, Cloud point,neutralisation Number,Emulsification number. (b) Answer the following question. (1) Explain pitting corrosion. (2) Explain electrochemical series.write its importance. Q.5 (a) Answer the following question. (1) Distinguish between thermoplastic and thermosetting plastic. (2) Explain vulcanization of rubber and its advantage. (b) Answer the following question. (1) Distinguish between Paint & Varnishes. (2) Explain characteristics of good Adhesives. Q.5 (a) Answer the following question. (1) Write constituent of oil paint & varnish. (2) Give preparation & properties of Nylon66 polymer. (b) Answer the following question. (1) Give properties of Refractorie. (2) Define Insulating material & Give its type. (3) Classification of Refractories. (PTO) 2

18 ન.૧ (અ) ન ચ ન ન ન જવ બ આપ. (ક ઇપણ ણ ) ૦૭ (૧) S અન P ક કન આક ર દ ર. (૨) ૧૭ Cl23 & ૨૬ Fe ન ઇલ નક સ રચન લખ. (3) ૧૧ Na ૨૩ & ૯૨ U 235 ન સ ણ અથ સમ વ. (૪) વ ત વભ ય ન ઔ ગક ઉપય ગ લખ. (બ) ખ લ જ ય ર. (૧) PH + POH =. ૦૭ (૨) 100 ppm =.ડ લ ક. (૩) રબરન વ કન કરણમ (૪) તરન ગ વ ન ઇ ઝ ગ કહ છ. ન ઉપય ગ થ ય છ. (૫) પ ન ક મ ટ ન સ ધનન ઉપય ગ ન મ પનમ થ ય છ. (૬) ૭૮pt191 મ અ ભ ર (૭) ફ ઇટ ન હક છ. છ. ન.૨ (અ) ન ચ ન ન ન જવ બ આપ. ૦૭ (૧) આઉફ-બ ઉ ન સ ધ ત સમ વ. (૨) ય ય :આયન કરણ શ ત & ઇલ ન બ ત. (૩) પરમ મ ક અન પરમ ભ ર ન અથ સમ વ. (બ) ન ચ ન ન ન જવ બ આપ. ૦૭ (૧) આય નકરણ શ પર અસર કરત પ રબળ લખ. (૨) ૦.૨ M HCl ન વણન PH ગણ. (૩) બફર વણ ઍટલ.ય ય ઉદ હરણ સહ ત ત ન ક ર સમ વ. અથવ (બ) ન ચ ન ન ન જવ બ આપ. ૦૭ (1) ય ય ઉદ હરણ સહ ત આય નક બ ધન રચન સમ વ. 3

19 (૨) સહસ ય જક સ ય જન ન લ ણકત ઓ આપ. (૩) હ ઇ જન બ ધન અ યત લખ. ન.૩ (અ) ન ચ ન ન ન જવ બ આપ. ૦૭ (૧) વ ત વભજન ક ષ ન રચન અન ક ય સમ વ. (૨) રણન દર પર અસર કરત પ રબળ સમ વ. (૩) ધ ન ર ણ મ ટન દ દ પ ધ ત કઇ? (બ) ન ચ ન ન ન જવ બ આપ. ૦૭ (૧) PH અન ત ન અગ યત મ સમ વ. (૨) N ક રન અધ વ હક ઍટલ? (૩)હ ઇ જન ઇલ ડન મ ણ ત શરત લખ. અથવ ન.૩ (અ) ન ચ ન ન ન જવ બ આપ. ૦૭ (૧)ક યમ ઠ નત ન ર ન ન મ અન આપ. (૨) ઝ ય લ ઇટ પ ધ તન ર સ ય ણક સમ કરણ લખ. (૩) આયન વ નમય પ ત સમ વ. (બ)(૧) પ ણ ન ક ઠ નત દશ વવ ન દ દ ર ત લખ. ૦૭ (૨) પ ણ ન ન ન ન વગત ન ચ જબ છ ત ન ક યમ, ણક તથ લ ક ઠનત ગણ. Ca(HCO 3 ) 2 =81 mg/lit, Mg(HCO 3 ) 2 = 16.2mg/lit CaCl 2 =77.7mg/lit, MgCl 2 =19.0 mg/lit, Caso 4 =6.8mg/lit,MgSo 4 =6.0mg/lit. ન.૪ (અ) ન ચ ન ન ન જવ બ આપ. (૧) પ ણ ન ધકરણન દ દ ર ત ન ચચ કર. ૦૭ (૨) બ ઇલરમ ક ઠન પ ણ થ થત અસર લખ. (બ) ન ચ ન ન ન જવ બ આપ. ૦૭ (૧) ય ય અપ. ક ટ. ક ટન ક ય અપ. (૨) સ મ વત ન હન સમ વ. 4

20 અથવ.૪ (અ) ન ચ ન ન ન જવ બ આપ. ૦૭ (૧) ક ટ વગ કરણ અપ. (૨) ય ય : ભડક બ,વ દળ બ,તટ થ કરણ ક, પ યસ કરણ ક. (બ) ન ચ ન ન ન જવ બ આપ. ૦૭ (૧) પ ટ ગ રણ સમ વ. (૨) વ તર સ ય ણક ણ સમ વ ત ન અગ યત લખ..૫ (અ) ન ચ ન ન ન જવ બ આપ. ૦૭ (૧) થમ લ ટક અન થમ સ ટ ગ લ ટક વ ચ ન તફ વત. (૨) ર બર કન કરણ અન ત ન ફ યદ સમ વ. (બ) ન ચ ન ન ન જવ બ આપ. ૦૭ (૧) ર ગ અન વ ન શ વ ચ ન તફ વત. (૨) સ ર આસ જક ન લ ણ ત ઓ સમ વ. અથવ.૫ (અ) ન ન ન ચ ન જવ બ આપ. ૦૭ (૧) ર ગ અન વ ન શન ઘટક લખ. (૨) ન યલ ન ૬૬ ન બન વટ & ણધમ આપ. (બ) ન ન ન ચ ન જવ બ આપ. ૦૭ (૧) ઉ મ સહન ણધમ અપ. (૨) ય ય : વસ વ હ પદ થ & ત ન ક ર અપ. (૩) ઉ મ સહ વગ કરણ. ************** 5

21 Seat No.: Enrolment No. GUJARAT TECHNOLOGICAL UNIVERSITY Diploma Engineering - SEMESTER II EXAMINATION WINTER 2012 Subject code: Date: 15/01/2013 Subject Name: Applied Science-II Time: am pm Total Marks: 70 Instructions: 1. Attempt any five questions. 2. Make suitable assumptions wherever necessary. 3. Figures to the right indicate full marks. 4. English version is considered to be Authentic. Q.1 (a) Answer the following (1) Define the term: (a) Ionization energy (b) Electrolyte (2) State Auf-Bau s principle (3) Give electronic configuration of (a) 17 Cl 35 (b) 26 Fe 56 (4) Give characteristics of ionic substances (5) What are refractories and give its classification (6) Give the types of electrolytes with suitable examples (7) Write the name of monomers used in (a) PVC (b) Terelyne Q.2 Answer the following (a) (b) Fill in the gaps (1) Alumina and Magnesia are example of refractories (2) As dilution of aqueous solution increases, the degree of ionization (3) Nylon 6,6 is formed by polymerization reaction. (4) The value of first ionization energy is than second ionization energy (5) The no. of neutrons in the atom of 11 Na 23 is (6) The shape of P orbital is (7) The solution which resists the change in hydrogen ion concentration is known as (1) Define (i) Viscosity index (ii) Flash point (iii) fire point (2) Write only Chemical reactions occurring in Ion exchange process For removal of hardness (b) (1) Explain condensation polymerization with suitable example (2) State properties and uses of Thermocole and glass wool 03 Q.3 Answer the following (a) What is Buffer solution? Give its types with suitable examples (b) (c) Explain construction and working of Galvanic cell Explain the importance of ph in various fields of Engineering Q.3 (a) Explain Hydrogen bond and give its significance (b) (c) Define: Degree of ionization,state the factors affecting degree of ionization Define ph and calculate the ph of Acidic solution containing 0.001M concentration of H 3 O + 1

22 Q.4 Answer the following (a) What are adhesives? Give characteristics of Good adhesive (b) (c) Give classification of lubricants with examples Distinguish between the Paint and Varnish Q. 4 (a) What is electrolysis? Explain refining of impure Cu by electrolysis (b) (c) Explain Zeolite process for softening of hard water Write the functions of ingredients of paints Q.5 Answer the following (a) Explain Fluid film lubrication with diagram (b) Water sample contains the following salts present in it.find (i) Temporary hardness(ii) Permanent hardness (iii) Total hardness of water sample in ppm Ca(HCO3)2 = 81 mg/litre CaSO4 = 13.6 mg/litre Mg(HCO3)2 = 14.6 mg/litre MgCl2 = 19.0 mg/litre (c) Explain Vulcanization of rubber with its advantages Q.5 (a) Explain covalent bond and write its characteristics (b) (c) State the essential properties of lubricants used for Cutting tools and Steam turbine Write short note on method of Anodic and Cathodic protection of metal -૧ (અ) ન ચ ન ન જવ બ આપ. ************ જર ત (1) ન ચ ન પદ ન ય ય આપ. (અ) આયન કરણ શ ત (બ) વ ત વભ જય (2) આઉફ-બ ઉ ન નયમ જણ વ. (3) (અ) 17 Cl 35 ( ) 2 6 Fe 56 ન ઇલ ક ન ક બ ધ રણ લખ. (4) આય ન ક પદ થ ન લ ણકત ઓ આપ. (5) ઉ મ સહ પદ થ એટલ? ત વગ કરણ કર. (6) ય ય ઉદ હરણ સ હત વ ત વભ જયન ક ર જણ વ. (7) (અ) પ.વ.સ.(બ) ટ ર લ ન ન બન વટ મ ટ વપર ત મ ન મરન ન મ લખ 14-૨ 14 (અ) ખ લ જ ય ર (1) એ મ ન અન મ ન શ ય ઉ મ સહ ઉદ હરણ છ. (2) મ વણન મ દત વધ ત મ આયન કરણ શન યમ થ ય છ.. 2

23 (3) ન યલ ન 6,6 ન બન વટ બ ધટકટ ય ર થ ય છ (4) થમ આયન કરણ શ કત ય તય આયન કરણ શ કતન ય કરત હ ય છ. (5) 11 Na 23 ન પરમ મ નન સ ય હ ય છ. (6) p ક કન આક ર હ ય છ. (7) જલ ય વણ હ ઇ જનન આયનન સ ત મ થત ફ રફ રન તક ર કર ત વણ કહ વ ય (બ) (બ) (1) ય ય આપ. (અ) ન ધત ક (બ)ભડક બ (ક) આગ બ (2) પ ણ ન ક ઠનત ર કરવ મ ટ ન આયન વ નમય પ ધ તમ થત મ ર સ ય ણક કય ઓ લખ. (1) ય ય ઉદ હરણ સ હત સ ઘનન બ ઘટકત વશ સમ વ. (2) લ સ લ અન થમ ક લન ણધમ અન ઉપય ગ જણ વ ન ચ ન ન જવ બ આપ (અ) (બ) (ક) બફર વણ એટલ? ય ય ઉદ હરણ સ હત બફર વણન ક ર જણ વ. ગ વ નક ક ષન રચન અન ક ય પ ધ ત સમ વ. ઇજન ર ન દ દ મ ph ન અગ યત સમ વ. અથવ (અ) હ ઇ જન બ ધ વશ સમ વ અન ત મહ વ જણ વ. (બ) આયન કરણ શ પદન ય ય આપ અન આયન કરણ શન અસર કરત પર બળ જણ વ. (ક) ph ન ય ય આપ M હ ઇ જન આયન(H 3 O + ) ન સ ત ધર વત એ સ ડક વણ ph ય ગણ. -૪ (અ) (બ) (ક) ન ચ ન ન જવ બ આપ સ સગ પદ થ એટલ? સ ર સ સગ પદ થ ન ખ સયત જણ વ. ઉદ હરણ સ હત ન હક વગ કરણ લખ. ત લ ર ગ અન વ ન વ ચ ન ભ દ જણ વ. અથવ -૪ (અ) વ ત વભ જન એટલ શ? વ ત વભ જન ર અ ધ ત બ (Cu) 3

24 (બ) ધ કરણ સમ વ. ક ઠન પ ણ ન નરમ બન વવ મ ટ ન ઝ ય લ ઇટ પ ધ ત વશ સમ વ (ક) ત લ ર ગમ વપર ત ઘટક ન ક ય લખ. ૦૪-5 -5 ન ચ ન ન જવ બ આપ (અ) તરલ-પડ ન હન આ ત સ હત સમ વ (બ) (ક) પ ણ ન ન ન થકરણ કરત ત મ રહ લ ર મ ણ ન ચ મ ણ મ. પ ણ મ રહ લ (i) ણક ક ઠનત (ii) ક યમ ક ઠનત અન (iii) લ ક ઠનત મ ણ શ ધ. Ca(HCO3)2 = 81 mg/litre CaSO4 = 13.6 mg/litre Mg(HCO3)2 = 14.6 mg/litre MgCl2 = 19.0 mg/litre ( H=01, C = 12, O = 16, Mg = 24, S = 32, Cl = 35.5,Ca = 40 ) વ ક ન ઇઝ શનન ફ ઇદ ઓ સ હત રબર વ ક ન ઇઝ શન સમ વ. અથવ (અ) સહસ ય જક બ ધ સમ વ.ત ન લ ણકત ઓ લખ. (બ) (ક) ક ટ ગ સ અન ટ મ ટબ ઇન મ ટ વપર ત ન હક ન જ ર ણધમ જણ વ ધ ન એન ડક અન ક થ ડક ર ણ મ ટ ન ર ત ઉપર કન ધ લખ. ૦૪ ૦૪ ************ 4