Q 1 Ferrous oxide has a cubic structure. The length of edge of the unit cell is 5 Å. The density of

Size: px

Start display at page:

Download "Q 1 Ferrous oxide has a cubic structure. The length of edge of the unit cell is 5 Å. The density of"

Branden Porter
6 years ago
Views:

1 Q 1 Ferrous oxide has a cubic structure. The length of edge of the unit cell is 5 Å. The density of the oxide is 4.0 g cm 3. Then the number of Fe 2+ and O 2 ions present in each unit cell will Four Fe 2+ and four O 2 Two Fe 2+ and two O 2 Four Fe 2+ and two O 2 Two Fe 2+ and four O 2 Q 2 The unit cell with the structure given below represents... crystal system. Cubic Tetragonal Orthorhombic Trigonal Q 3 In a face centred cubic unit cell, edge length is 2r r Q 4 When a solution containing non volatile solute freezes, which of the following equilibrium would exist? Solid solvent liquid solvent Solid solute solution Solid solute liquid solvent Solid solvent solution. Q 5 The vapour pressure of water at 20 0 C is 17.5 mm Hg. If 8 g of glucose (C 6 H 12 O 6 ) is added to g of water at 20 0 C, the vapour pressure of the resulting solution will be mm Hg mm Hg mm Hg mm Hg Q 6 On mixing 25 ml of acetone with 25 ml of ethyl alcohol, the total volume of solution is =50 ml < 50 ml >50mL Unpredictable Q 7 The tendencies of the electrodes made up of Cu, Zn and Ag to release electrons when dipped in their respective salt solutions decrease in the order Zn > Ag > Cu Cu > Zn > Ag

2 Zn > Cu > Ag Ag > Cu > Zn Q 8 The number of coulombs required for the deposition of g of silver is Q 9 Which of the following graphs will show the variation of partial pressure of N 2 O 5 decomposing into NO 2 and O 2 following the first order kinetics? Q 10 What is the energy of activation of a reaction if its rate doubles when the temperature is raised from 290K to 300 K? 12 kcal 13.8 kcal 41 kcal 52 kcal Q 11 Butter is a colloid formed when Fat is dispersed in water Fat globules are dispersed in water Water is dispersed in fat None of the above Q 12 The critical temperatures of O 2, N 2, H 2 and CO 2 and K, 126 K, 33.2 K and 304 K. The extent of adsorption on tungsten may be highest in case of H 2 N 2 O 2 CO 2 Q 13 Which step is not involved in hydrometallurgical process? Cu 2 S + 2Cu 2 O 6Cu + SO 2

CuFeS 2 + 2H 2 SO 4 CuSO 4 + Fe FeSO 4 + Cu CuSO 4 + FeSO 4 + 2H 2 S CuCO 3 + H 2 SO 4 CuSO 4 + H 2 O + CO 2 Q 14 In the extraction of copper, the reaction which does not take place in Bessemer

3 CuFeS 2 + 2H 2 SO 4 CuSO 4 + Fe FeSO 4 + Cu CuSO 4 + FeSO 4 + 2H 2 S CuCO 3 + H 2 SO 4 CuSO 4 + H 2 O + CO 2 Q 14 In the extraction of copper, the reaction which does not take place in Bessemer converter is 2CuFeS 2 + O 2 Cu 2 S + FeS + SO 2 2Cu 2 O + Cu 2 S 6Cu + SO 2 2Cu 2 S + 3O 2 2Cu 2 O + 2SO 2 2FeS + 3O 2 2FeO + 2SO 2 Q 15 When an aqueous solution of sodium chloride is electrolysed using platinum electrodes, the compounds discharged at the electrodes are Sodium and hydrogen Sodium and chloride Hydrogen and chlorine Hydroxyl and chloride. Q 16 The method of purification of metal employing the technique of fractional crystallisation is Cupellation Van Arkel method Zone refining Oxidative refining Q 17 A greenish yellow gas reacts with an alkali metal hydroxide to form a halite which can be used in fireworks and safety matches. The gas and halite respectively are Br 2, KBrO 3 Cl 2, KClO 3 I 2, NalO 3 Cl 2, NaClO 3 Q 18 The structural formula of orthophosphoric acid is

4 Q 19 With respect to protonic acids, which of the following statements is correct? PH 3 is more basic than NH 3 PH 3 is less basic than NH 3 PH 3 is equally basic as NH 3 PH 3 is amphoteric while NH 3 is basic Q 20 Which of the following configuration is correct for iron? 1s 2 2s 2 2p 6 3s 2 3p 6 3d 5 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 5 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 1 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 6. Q 21 The crystals of anhydrous ferrous sulphate on heating give FeO + SO 2 + H 2 O FeO + SO 3 + H 2 SO 4 + H 2 O Fe 2 O 3 + SO 2 + SO 3 Fe 2 O 3 + H 2 SO 2 + H 2 O Q 22 Which statement is incorrect? Iron belongs to 3d transition series of the periodic table Iron belongs to f block of the periodic table Iron belongs to first transition series Iron belongs to group VIII of the periodic table Q 23 Which is high spin complex? [CoF 6 ] 3 [Fe(CN) 6 ] 3 [Fe(CN) 6 ] 4 None of these Q 24 The two complexes given below are Geometrical isomers Optical isomers Position isomers Identical Q 25 Silver chloride is soluble in methylamine due to the formation of

[Ag(CH 3 NH 2 ) 2 ] Cl Ag(CH 3 NH 2 ) Cl AgOH Ag + CH 3 Cl + NH 4 Cl Q 26 The reaction of 4 bromobenzyl chloride with NaCN in ethanol leads to 4 bromobenzyle cyanide 4 cyanobenzyl chloride 4

5 [Ag(CH 3 NH 2 ) 2 ] Cl Ag(CH 3 NH 2 ) Cl AgOH Ag + CH 3 Cl + NH 4 Cl Q 26 The reaction of 4 bromobenzyl chloride with NaCN in ethanol leads to 4 bromobenzyle cyanide 4 cyanobenzyl chloride 4 cyanobenzyl cyanide 4 bromo 2 cyanobenzyl chloride. Q 27 Among the following the most highly ionised in water is CH 3 CH 2 CH(Cl)COOH CH 3 CH 2 CCL 2 COOH CH 3 CH(Cl)CH 2 COOH CH 2 (Cl)CH 2 CH 2 COOH Q 28 Which one of the following will react fastest with aqueous NaOH? Q 29 Set of compounds in order of their decreasing boiling points. Pentan 1 o1, butan 1 o1, butan 2 o1, propan 1 o1 Pentan 1 o1 > butan 1 o1 > butan 2 o1, > propan 1 o1 butan 1 o1 > Pentan 1 o1 > butan 2 o1, >propan 1 o1 butan 2 o1 > butan 1 o1 > Pentan 1 o1 > propan 1 o1 propan 1 o1 > butan 1 o1 > butan 2 o1 > Pentan 1 o1

Q 30 The wrong statement about glycerol is It is a trihydric alcohol Acidified KMnO 4 convert it to oxalic acid Used in the manufacture of explosives It is a tertiary alcohol.

6 Q 30 The wrong statement about glycerol is It is a trihydric alcohol Acidified KMnO 4 convert it to oxalic acid Used in the manufacture of explosives It is a tertiary alcohol. Q 31 Which of the following will not give CHI 3 on treatment with I 2 and NaOH? CH 3 OH CH 3 CH 2 OH CH3 CH CH 3 CH 3 C CH 2 CH 3 OH O Q 32 Which of the following has the largest value of dissociation constant K a? Q 33 Vinegar contains how much percentage of acetic acid? % 10 12% 90 98% 7 8% Q 34 If an amide is treated with P 2 O 5 the likely product is an acid amine alkyl cyanide acid anhydride Q 35

7 Q 36 The reaction of C 6 H 5 N + 2 Cl with CuCl gives C 6 H 5 Cl C 6 H 6 C 6 H 5 C 6 H 5 C 6 H 4 Cl 2 Q 37 Which of the following reacts with chloroform and a base to form phenylisocyanide? Benzene Nitrobenzene Aniline Phenol Q 38 Adrenaline and ephedrine contain 1 0 amino group 3 0 amino group 2 0 amino group quaternary amino group Q 39 α D Glucose and β D glucose differ from each other due to difference in one carbon with respect to its Size of hemiacetal ring Number of OH groups Configuration Conformation Q 40 Mutarotation does not occur in Sucrose L Glucose D Glucose None of these Q 41 At the isoelectric point, amino acids are present as N 2 H CHR COOH H 3 N + CHR COOH (C) NH 2 CHR COO (D) H 3 N + CHR COO Q 42 In vulcanization of rubber Sulphur reacts to form a new compound Sulphur cross links are introduced Sulphur forms a very thin protective layer over rubber All statements are correct Q 43 Which one is a polymeric compound? SO 2 CO 2

8 CH 4 PVC Q 44 A sample of polymer contains 30% molecules with molecular mass 20,000, 40% with molecular mass 30,000 and 30% with 60,000. What is the number average molecular mass of the polymer? 36,000 48,000 50,000 25,000 Q 45 During the polymerisation of ε caprolactum to get nylon 6 polymer, the temperature range is of about 523 K to 533 K 533 K to 573 K 473 K to 523 K 273 K to 373 K

CHEMISTRY PAPER 1 (THEORY)

CHEMISTRY PAPER 1 (THEORY) (Three Hours) (Candidates are allowed additional 15 minutes for only reading the paper. They must NOT start writing during this time.) ---------------------------------------------------------------------------------------------------------------------