Question

7. Which of the following pairs of gases contain equal number of particles?
a) 1 g He, 1 g H, b) 1 g He, 2 g H,
c) 4 g He, 2 g H, d) 4 g He, 4 g H,
8. If equal mass of N, and 0, are taken, the ratio of number of molecules in these gases would be
a) 1 1 b) 7 : 8 c) 8 : 7 d) 28 : 32
9. Which of the following contains largest number of atoms?
a) 4 g of H, b) 1 g of 0,
c) 28 g of N2 d) 18 g of H2O
10. Which one of the following pairs of gases contain the same number of molecules?
a) 16 g of 0, and 14 g of N,
b) 8 g of 0, and 22 g of CO,
c) 28 g of N2 and 22 g of CO,
d) 32 g of 0, and 32 g of N,
11. How much amount of oxygen in (grams) is present in 32.2 g Na,SO4.10H20?
a) 20.8 b) 22.4 c) 2.24 d) 2.08

Answer 1

Answer:

7- (a)

8- (b)

9- (c)

10- (a)

11-( b)