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10., , 12., , 13., , 14., , Total number of atoms represented by the compound CuSO,.5H,0 is :, , (A) 27 (B) 21 (C) 5 (D) 8, , 7.5 grams of a gas occupy 5.8 litres of volume at STP the gas is :, , (A) NO (B) N,O (C) CO (D) CO,, The number of atoms in 4.25g of NH; is approximately :, , (A) 1 x03 (B) 2x10%3 (C) 4x1073 (D) 6x1073, One litre of a gas at STP weight 1.16 g it can possible be :, , (A) C,H, (B) CO (C) O, (D) CH,, , The vapour density of a gas is 11.2 . The volume occupied by 11.2 g of the gas at STP will, be:, , (A) 11.2L (B) 22.4L (C) IL (D) 44.8 L, , The equivalent weight of an element is 4. Its chloride has a V.D 59.25. Then the valency of the, clementis :, , (A) 4 (B) 3 (C)2 (D) 1, , The mass of a molecule of water is :, , (A)3x 107% kg = (B)3 x 10> kg = (C) 1S x 107 kg (D) 2.5 x 10°77 kg, The atomic weights of two elements A and B are 40 and 80 respectively. If x g of Acontains, , y atoms, how many atoms are present in 2x g of B:, , (A) 5 (B) y Oy (D) 2y, , If N, is Avogadro's number then numbert of valence electrons in 4.2 g of nitride ion (N*-) :, (A) 2.4 Ny (B) 4.2 Ny (C) 1.6 Ny (D) 3.2 Na, , How much coulomb charge is present on Ig ion of N* :, , (A) 5.2 x 10° Couloumb (B) 2.894 x 10° Couloumb, , (C) 6.6 x 10° Couloumb (D) 8.2 x 10° Couloumb, , If we consider that 1/6, in place of 1/12, mass of carbon atom is taken to be the relative atomic, mass unit, the mass of one mole of a substance will :, , (A) Decrease twice (B) Increase two fold, , (C) Remain unchanged (D) Be a function of the molecular mass of the, substance, , The number of molecule at NTP in | ml of an ideal gas will be :, , (A) 6 x 1073 (B) 2.69 x 10!? (C) 2.69 x 1073 (D) None of these, , The weight of a molecule of the compound CggH 4, is :, , (A) 14x 107g (B) 1.09x 107!g (C) 5.025 x 10g (D) 16.023 x 107 g, If the density of water is 1g cm™ then the volume occupied by one molecule of water is, approximately, , (A) 18 cm? (B) 22400 cm? (C) 6.02 x 10° cm? (D) 3.0 x 10-3 cm3, , Scanned with CamScanner

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15. Caffeine has a molecular weight of 194, If it contains 28.9% by mass of nitrogen, number of, atoms of nitrogen in one molecule of caffeine is :, (A) 4 (B) 6 (C) 2 (D) 3, 16, A400 mg iron capsule contains 100 mg of ferrous fumarate, (CHCOO),Fe. The percentage, of iron present in it is approximately :, (A) 33% (B) 25% (C) 14% (D) 8%, 17, The number of gram atoms of oxygen present in 0.3 gram mole of (COOH),.2H,0 is :, (A) 0.6 (B) 1.8 (C) 1.2 (D) 3.6, 18. A gascous mixture contains CH, and C,H, in equimolecular proportion. The weight of 2.24 litres, of this mixture at NTP is :, (A) 4.6 g (B) 16g (C) 2.3 g (D) 23 g, 19. Vapour density of a metal chloride is 66. Its oxide contains 53% metal. The atomic weight of, the metal is :, (A) 21 (B) 54 (C) 27.06 (D) 2.086, 20. 100 mL of PH, on decomposition produced phosphorus and hydrogen. The change in volume is, (A) 50 mL increase (B) 500 mL decrease (C) 900 mL decrease (D) Nil., 21. How many mole of helium gas occupy 22.4 L at 0°C at | atm. pressure :, (A) 0.11 (B) 0.90 (C) 1.0 (D) 1.11, 22. Volume of a gas at STP is 1.12x1077 cc. Calculate the number of molecules in it :, (A) 3.01 x 1077 (B) 3.01 x 10!? (Cy 3.01. x 1027 ~—(D) 3.01 x 1024, 23. = The number eee in 4.25g mon MSise n ., (A) 0.5 x 10>” (B) 1.5 x 10° (C) 3.5 x 10°" (D) 1.8 x 10°*, 24, Which one of the following pairs of gases contains the same number of molecules :, (A) 16g of O, and 14 g of N, (B) 8 g of O, and 22 g of CO,, (C) 28 g of N, and 22 g of CO, (D) 32 g of O, and 32 g of N,, 25. Number of gm of oxygen in 32.2 ¢ Na,SO,.10H,0 is :, (A) 20.8 (B) 22.4 (C) 2.24 (D) 2.08, 26. The number of oxygen atoms in 4.4 g of CO, is approx :, (A) 1.2 x 1073 (B) 6 x 1077 (C) 6 x 103 (D) 12 x 103, 27; 19.7 kg of gold was recovered from a smuggler, How many atoms of gold were recovered, (Au = 197), (A) 100 (B) 6.02 x 1073 (C) 6.02 x 1074 (D) 6.02 x 1025, 28. — The total number of protons in 10 g of calcium carbonate is (No=6.023x107) ‘, (A) 1.5057 x 10 (B) 2.0478 x 10% (C) 3.0115 x 1074 (D) 4.0956 x 1024, 29. The number of molecules in 16 g of methane is :, (A) 3.0 x 1023 (B) 6.02 x 1023 (C) ax 103 (D) sox 107, 30. | Number of molecules in 100 ml of each of 0,,NH, and CO, at STP are :, (A) In the order CO, < O, < NH, (B) In the order NH,<O,<CO,, (C) The same (D) NH, = CO, < 0,, , , , Scanned with CamScanner

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31., , 32., , 33., , 34., , 35,, , 36., , 37., , 38., , 39., , 40., , 41., , 42., , 43., , 45., , The numbers of moles of BaCO, which contain 1.5 moles of oxygen atoms is :, , (A) 0.5 (B) 1 (C) 3 (D) 6.02 x 1073, The number of moles of sodium oxide in 620g of it is :, (A) | mol (B) 10 moles (C) 18 moles (D) 100 moles, , 2g of oxygen contains number of atoms equal to that in:, (A) 0.5g of hydrogen (B) 4g of sulphur (C) 7g of nitrogen (D) 2.3g of sodium, The percentage of oxygen in NaOH is:, , (A) 40 (B) 60 (C)8 (D) 10, , The percentage of nitrogen in urea is about :, , (A) 46 (B) 85 (C) 18 (D) 28, , How much water should be added to 200 c.c of semi normal solution of NaOH to make itexactly, deci normal :, , (A) 200 ce (B) 400 cc (C) 800 cc (D) 600 cc, , 2.76 g of silver carbonate on being strongly heated yield a residue weighing :, , (A) 2.16 g (B) 2.48 g (C) 2.64 g (D) 2.32 g, , Haemoglobin contains 0.33% of iron by weight. The molecular weight of haemoglobin is, approximately 67200. The number of iron atoms (At. wt. of Fe=56) present in one molecule, of haemoglobin is :, , (A) 6 (B) I (C) 4 (D) 2, The percentage of PO, in diammonium hydrogen phosphate (NH,),HPO, is, (A) 23.48 (B) 46.96 (C) 53.78 (D) 71.00, , If! ; moles of oxygen combine with Al to form Al,0, the weight of Al used in the reaction, is (Al =27), , (A) 27g (B) 54g (C) 49.5 g (D) 31 g, , The percentage of Se in peroxidase anhydrous enzyme is 0.5% by weight (atomic weight=78.4)., Then minium molecular weight of peroxidase anhydrous enzyme is :, , (A) 1.568 x 104 = (B) 1.568 x 103 (C) 15.68 (D) 3.136x104, , H, evolved at STP on complete reaction of 27 g of Aluminium with excess of aqueous NaOH, would be :, , (A) 22.4 (B) 44.8 (C) 67.2 (D) 33.6 litres, What is the % of H,0 in Fe(CNS),. 3H,0 =, (A) 45 (B) 30 (C) 19 (D) 25, , If 10?! molecules are removed from 200 mg of CO,, then the number of moles of CO, left, are, , (A) 2.88 x 10 (B) 1.66 x 1073 (C) 4.54 103 (D) 1.66 x 10°, Which among the following pairs contains isomorphous substances?, , (A) FeSO, . 7,0 and CuSO, . 5H,0, , (B) FeSO, . 7H,O and MnSO, . 4H,0, , (C) FeSO, . 7H,O and ZnSO, . 7H,0, , (D) CuSO, . SHO and MnSO, . 4H,0, , , , OA TANAT Rea AAS SD eee ree ae ee rere, , Scanned with CamScanner