List I List II. 6. Match the following.

Size: px

Start display at page:

Download "List I List II. 6. Match the following."

Arron Webb
5 years ago
Views:

1 1. Which pair is incorrect? (a) tannic acid: leather (b) amino acid: proteins (c) lactic acid: milk (d) acetic acid: vinegar 2. With chloroform and alkali, phenol is converted to (a) chlorobenzene (b) benzonic acid (c) salicylaldehyde (d) toluene 3. Zone refining is used for the purification of (a) Au (b) Ge (c) Ag (d) Cuevel-4 4. Match the following. A. sulphuric acid 1. Sicilian process B. ammonia 2. Contact process C. sulphur 3. Haeber s process A B C (a)1 2 3 (b)2 1 3 (c)3 1 2 (d) Match the following. List I List II A. tin 1. aunite B. copper 2. argentite C. silver 3. starinite D. gold 4. malachite (a) (b) (c) (d) Match the following.

2 A sodium 1. bleaching powder bicarbonate B calcium 2. baking soda carbonate C potash 3. chalk D calcium 4. alum hypochlorite (a) (b) (c) (d) Match the following A. carbon dioxide 1. reducing agent B. chlorine 2. anaesthetic in dentistry C. hydrogen 3. bleaching powder D. nitrous oxide 4. refrigerant (a) (b) (c) (d) Match the following. A. calomel 1. copper sulphate B. blue vitriol 2. calcium sulphate C. gypsum 3. mercurous chloride D. normal salt 4. sodium chloride (a) (b) (c) (d) Match the following. A. acetic acid 1. milk B. tannic acid 2. proteins

3 C. ammo acid 3. tea D. lactic acid 4. vinegar (a) (b) (c) (d) Match the following. A. helium 1. treatment of cancer B. neon 2. electrical signs C. radon 3. generation of low temperatures A B C (a) (b) (c) (d) Match the following. List I List II A. freon 1. bleaching B. chloroform 2. antiseptic C. iodoform 3. refrigerant D. ozone 4. anaesthetic (a) (b) (c) (d) Match the following. A. washing soda 1. sodium hydroxide B. caustic soda 2. copper sulphate C. blue vitriol 3. sodium thiosulphate D. hypo 4. sodium carbonate

4 (a) (b) (c) (d) Match the following. I. natural rubber A. buna-s II. synthetic B. latex rubber III. natural fibre C. wool IV. synthetic D. nylon fibre I II III IV (a) B A C D (b) (c) B A D C (d) C D A B 14. Match the following. List I List II A. glass 1. phosphorus B. matchsticks 2. sodium C. fertiliser 3. sodium silicate D. salt 4. potassium sulphate (a) (b) (c) (d) Match the following. I. quinine A. sugarcane II. molasses B. cinchona III. iodine C. hevea IV. rubber D. sea kelp (a) I-B, II-A, III-D, IV-C

5 (b) I-D, II-A, III-B, IV-C (c) I-B, II-C, III-D, IV-A (d) I-A, II-B, III-C, IV-D 16. Match the following. (A) N 2 O (i) white crystalline solid (B) NO (ii) colourless gas rekindling a glowing splint (C) NO 2 (iii) colourless gas turning brown in air (D) N 2 O 5 (iv) reddish gas (a) (A) 2, (B) 3, (C) 4, (D) 1 (b) (A) 3, (B) 4, (C) 1, (D) 2 (c) (A) 4, (B) 1, (C) 2, (D) 3 (d) (A) 1, (B) 2, (C) 3, (D) Match the following columns A. mercury 1. element B. oxygen 2. compound C. water 3. mixture D. air 4. metal (a) (b) (c) (d) Gold number is the index for (a) protective colloid (b) gold present in ornaments (c) extent of gold plating done (d) weight of gold in milligrams present per litre of a gold sol 19. Blue colour of the sky is due to (a) absorption of light by dust particles (b) reflection of light by dust particles (c) scattering of light by dust particles (d) presence of clouds which are a colloidal dispersion of water particles in air 20. Iodine deficiency in diet is known to cause

6 (a) beri-beri (b) rickets (c) nightblindness (d) goiter 21. The reactions of glucose suggest that it is (a) a pentahydroxy aldehyde (b) hydrate of carbon (c) a polyhydroxy ketone (d) an alcohol 22. A compound gives both ninhydrin test and Molisch s test. It is (a) a carbohydrate (b) a carboxylic acid (c) a protein (d) an amino acid 23. Bleeding gums is generally associated with the deficiency of (a) thiamine (b) ascorbic acid (c) folic acid (d) vitamin E 24. The hormone which transports glucose from blood to tissue is (a) glycogen (b) insulin (c) thyroxin (d) heparin 25. An emulsifier is a substance (a) which can convert every liquid into an emulsion (b) which breaks the emulsion into its constituent liquids (c) which stabilises an emulsion (d) which brings about coagulation of an emulsion 26. If N A is Avogadro s number, then number of electrons in 4.2 g of azide ions (N 3 ) is (a) 2 N A (b) 4.2 N A (c) 1.6 N A (d) 3.6 N A 27. The number of atoms present in 21.6g of silver (atomic weight = 108) are same as the molecules in (a) 1.8g of H 2 O (b) 12moles of KMnO 4 (c) 0.6 N H 2 SO 4 (d) 4.6g of C 2 H 5 OH kg of gold was recovered from a smuggler. How many atoms of gold were recovered? (Au = 197) (a) (b) (c) (d)

7 29. The volume of a gas at 0 C and 700 mm pressure is 760 ml. The number of molecules present in this volume is (a) (b) (c) (d) Equal masses of oxygen, hydrogen and methane are kept under identical conditions. The ratio of the volumes of the gases will be (a) 2 : 16 : 2 (b) 2 : 16 : 1 (c) 1 : 16 : 2 (d) 1 : 1 : If molecules are removed from 200 mg of CO 2, then the number of moles of CO 2 left are (a) (b) (c) (d) A sample of CaCO 3 has Ca = 40 %, C = 12 % and O = 48 %. If the law of constant proportions is true, then the mass of Ca in 5 g of CaCO 3 from another source will be (a) 2.0 g (b) 0.2 g (c) 0.02 g (d) 20.0 g 33. The density of air is g ml 1. Its vapour density is (a) 143 (b) 14.3 (c) 1.43 (d) An organic compound on analysis was found to contain 0.032% of sulphur. The molecular mass of the compound, if its molecule contains two sulphur atoms, is (a) 200 (b) 2000 (c) (d) Two elements X (atomic mass = 50) and Y (atomic mass = 16) combine to give a compound having 32 % Y. The formula of the compound is (a) X 2 Y 3 (b) XY (c) XY 2 (d) X 3 Y The vapour density of certain gas X is 4 times that of Y. The molecular mass of X is M the molecular mass of Y is (a) 4 M (b) 0.5 M (c) 0.25 M (d) 0.33 M 37. The mass of sulphuryl chloride which contains 14.2g chlorine is (a) 27g (b) 135g (c) 13.5g (d) 260mg.

8 38. The number of g-molecule of oxygen in CO molecules is (a) 1g-molecule (b) 0.5g-molecule (c) 5g-molecule (d) 10g-molecule ml of NH 3 contains molecules at S.T.P. How many molecules are present in 100 ml of CO 2 at S.T.P? (a) (b) (c) (d) None 40. Haemoglobin contains 0.33 % of iron by mass. The molecular mass of haemoglobin is approximately The number of iron atom (atomic mass 56) in one molecule of haemoglobin is (a) 6 (b) 1 (c) 4 (d) 26 The brown ring complex compound is formulated as [Fe (H 2 O) 5 (NO)]SO 4. The oxidation state of iron is (a) 1 (b) 2 (c) 3 (d) Sulphur dioxide bleaches colouring matter by (a) oxidation (b) reduction (c) dehydrogenation (d) dehydration 42. NH 3 + OCl N 2 H 4 + Cl Balancing the above equation in basic solution using integral coefficient, which of the following whole number will be the coefficient of N 2 H 4? (a) 1 (b) 2 (c) 3 (d) Cr (OH) 3 + ClO + OH... + Cl + H 2 O. The missing ion is (a) Cr 2 O 2 7 (b) Cr 3+ (c) CrO 2 4 (d) CrO 44. Most abundant salt of sodium in nature is (a) NaNO 3 (b) Na 2 SO 4 (c) NaOH (d) NaCl 45. One gas bleaches the colour of flowers by reduction while the other by oxidation. The gases are (a) SO 2, Cl 2 (b) CO, Cl 2 (c) H 2 S, Br 2 (d) NH 3, SO H 2 O 2 acts as a reducing agent in the reaction (a) 2KI+H 2 O 2 2 KOH+I 2

9 (b) Ag 2 O + H 2 O 2 2Ag +H 2 O + O 2 (c) PbS + 4H 2 O 2 PbSO+ H 2 O (d) SO 2 +H 2 O 2 H 2 SO The number of mole of KMnO 4 that will be needed to react with one mole of sulphite ion in acidic solution is (a) 2/5 (b) 3/5 (c) 4/5 (d) The oxidation number of sulphur in S 8, S 2 F 2 and H 2 S respectively are (a) 0, +1 and 2 (b) + 2, +1 and 2 (c) 0, +1 and +2 (d) 2, +1 and The oxidation state of molybdenum in its oxo complex species [Mo 2 O 4 (C 2 H 4 ) 2 (H 2 O 2 )] 2 (a) 2 (b) 3 (c) 4 (d) A sample of steel weighing 3.0 g was subjected to a chemical reaction to convert its sulphur into H 2 S gas. The evolved gas required 2.40 ml. of 0.02 N solution of iodine. Then the percentage of S in steel is (a) 1.5 (b) 0.3 (c) (d) None 51. The oxidation number of iodine in periodic acid (H 5 IO 6 ) is (a) + 7 (b) + 3 (c) + 6 (d) The oxidation number of phosphorus in Ba(H 2 PO 2 ) 2 is (a) + 3 (b) + 2 (c) + 1 (d) The oxidation states of the most electronegative element in the products of the reaction, BaO 2 with dilute H 2 SO 4 are (a) 0 and 1 (b) 1 and 2 (c) 2 and 0 (d) 2 and When H 2 S is passed through acidified KMnO 4 solution, the colour of solution is decolourised. The change in oxidation state of Mn is (a) + 2 to + 7 (b) + 7 to + 2 (c) + 7 to + 4 (d) + 7 to In the reaction, 2 CuSO KI Cu 2 I K 2 SO 4 + I 2 the ratio of equivalent weight of CuSO 4 to its molecular weight is (a) 1/8 (b) 1/4

10 (c) 1/2 (d) Which statement is correct about the following change? I 2 + 2S 2 O 2 3 2I + S 4 O 2 6 (a) iodine gets oxidised to iodide ions (b) oxidation state of sulphur remains unaltered (c) thiosulphate ion is oxidised (d) oxidation state of sulphur changes from +1 to When mole of chloride of an element Y was completely hydrolysed, it was found that the resulting solution required 20 ml. of 0.1 M aqueous silver nitrate solution for complete precipitation of the chlorideion. Element Y could be (a) aluminium (b) phosphorus (c) silicon (d) sulphur 58. If equal volumes of 1M KMnO 4 and 1M K 2 Cr 2 O 7 solutions are allowed to oxidise Fe(II) to Fe (III) in acidic medium, then Fe(II) oxidised will be (a) more by KMnO 4 (b) more by K 2 Cr 2 O 7 (c) equal in both cases (d) can not be determined 59. H 2 S is passed through an acidified solution of CuSO 4 and a black precipitate is formed. This is due to (a) oxidation of Cu 2+ (b) reduction of Cu 2+ (c) neither reduction nor oxidation (d) reduction and oxidation 60. Oxidation number of Mn in KMnO 4 and that of S in Na 2 S 2 O 3 is (a) +7, +6 (b) 7, +2 (c) +7, 2 (d) both (a) and (c) Answer Keys 1. (a) 2. (c) 3. (b) 4. (d) 5. (c) 6. (b) 7. (c) 8. (d) 9. (c) 10. (b) 11. (b) 12. (d) 13. (a) 14. (b) 15. (a) 16. (a) 17. (c) 18. (a) 19. (c) 20. (d) 21. (a) 22. (c) 23. (b) 24. (b) 25. (c) 26. (a) 27. (b) 28. (a) 29. (a) 30. (c) 31. (d) 32. (a) 33. (b) 34. (c) 35. (a) 36. (c) 37. (a) 38. (c) 39. (c) 40. (c, b)

11 41. (b) 42. (a) 43. (c) 44. (d) 45. (a) 46. (b) 47. (a) 48. (a) 49. (b) 50. (c) 51. (a) 52. (c) 53. (b) 54. (b) 55. (d) 56. (c) 57. (d) 58. (b) 59. (c) 60. (d)

MAHESH TUTORIALS I.C.S.E.

MAHESH TUTORIALS I.C.S.E. GRADE - X (2017-2018) Exam No. : MT/ICSE/SEMI PRELIM - II - SET -A 020 Periodic Table, Chemical bonding, Acid, Bases and Salts, Practical Work, Mole Concept, Electrolysis Chemistry