Question

c) 28
como
7. If the relative atomic mass of oxygen is 64 units, the molecular mass of CO becomes
a) 112
b) 128
d) 7
8. One mole of lime stone on calcination produces 28g of calcium oxide and 22g of[
carbondioxide then how many grams of lime stone left behind
CaCO 3 →CaO+
a) 100g
b) 50g
c) 25g
d) 44g
9. Which of the following prove law of multiple proportion?
[
a) H.SO,,H,S b) CCl4, CH4 c) H20, H2O d) N2O, NO
10. Which of the following contains the maximum number of atoms
a) 10g CaCO3 b) 64 g of O2 c) 9 g of NHANO; d) 2g of Hydrogen
11. When 56g N2 reacts with 12g H2 then find the mass of NH3
[
a) 17g
b) 34g
c) 68g
d) 86g
12. When 120g of carbon is completely burnt in the presence of oxygen at 0°C and 1 atm
then find the mass of O2 required in kg.
a) 320
b) 0.320
c) 3.2
d) 0.0320
13. 1 mole of H2 gas react with 0.5 mole of Cl2 gas then find number of HCl formed.[
a) 0.5 mole
b) 1 mole
c) 2 mole d) 0.1 mole
14. Find the number of electrons in 1.8 g of water?
1
a) INA
b) 2 NA
c) 0.1 NA d) 0.2 NA
CD Smal​

Answer 1

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