Free Printable Mole Concept Practice Test 1

1.

a)

a

b)

b

c)

c

d)

d

2.

a)

a

b)

b

c)

c

d)

d

3.

10 g of hydrogen and 64 g of oxygen were filled in a steel vessel and exploded. Amount of water produced in this reaction will be,

a)

(a) 3 mol

b)

(b) 4 mol

c)

(c) 1 mol

d)

(d) 2 mol

4.

When 22.4 liters of H2(g) is mixed with 11.2 liters of Cl2(g), each at STP, the moles of HCl(g) formed is equal to

a)

(a) 1 mol of HCl(g)

b)

(b) 2 mol of HCl(g)

c)

(c) 0.5 mol of HCl(g)

d)

(d) 1.5 mol of HCl(g)

5.

Molarity of liquid HCl, if density of solution is 1.17 g/cc is

a)

(a) 36.5

b)

(b) 18.25

c)

(c) 32.05

d)

(d) 42.10

6.

The number of oxygen atoms in 4.4 g of CO2 is

a)

$(a)1.2\times10^{23}$

b)

$(b)6\times10^{22}$

c)

$(c)6\times10^{23}$

d)

$(d)12\times10^{23}$

7.

The density of 2 M aqueous solution of NaOH is 1.28 g/cm3 . The molality of the solution is [Given that molecular mass of NaOH = 40 g mol–1]

a)

(a) 1.20 m

b)

(b) 1.56 m

c)

(c) 1.67 m

d)

(d) 1.32 m

8.

Boron has two stable isotopes, $10_B$ (19%) and $11_B$ (81%). Calculate average at. wt. of boron in the periodic table.

a)

(a) 10.8

b)

(b) 10.2

c)

(c) 11.2

d)

(d) 10.0

9.

The number of atoms in 0.1 mol of a triatomic gas is, (NA = 6.02 × $10^{23}$ mol–1)

a)

$(a)6.026\times10^{22}$

b)

$(b)1.806\times10^{23}$

c)

$(c)3.600\times10^{23}$

d)

$(d)1.800\times10^{22}$

10.

The number of moles of hydrogen molecules required to produce 20 moles of ammonia through Haber’s process is

a)

(a) 40

b)

(b) 10

c)

(c) 20

d)

(d) 30

11.

a)

a

b)

b

c)

c

d)

d

12.

Find the mole fraction of a solute in 1 m aqueous solution.

a)

(a) 0.0354

b)

(b) 1.770

c)

(c) 0.177

d)

(d) 0.0177

13.

The amount of 70% HNO₃ required to prepare 250 ml of 2.0 M HNO₃ is

a)

(a) 54.0 g

b)

(b) 70.0 g

c)

(c) 90.0 g

d)

(d) 45.0 g

14.

Which of the following units of concentration is not temperature dependent?

a)

(a) Weight volume percent

b)

(b) Normality

c)

(c) Molarity

d)

(d) Molality

15.

In the reaction, 4NH3(g) + 5O2(g) → 4NO(g) + 6H2O(l),

when 1 mole of ammonia and 1 mole of O2 are made to react to completion

a)

(a) all the oxygen will be consumed

b)

(b) 1.0 mole of NO will be produced

c)

(c) 1.0 mole of H2O is produced

d)

(d) all the ammonia will be consumed.

16.

The volume of a gas at $0^0C$ and 700 mm pressure is 760 cc. The number of molecules present in this volume is

a)

a) $1..88\ \times10^{22}$

b)

b) $6.022\times10^{23}$

c)

c) $18.8\times10^{23}$

d)

$18.8\times10^{22}$

17.

2 moles of H atoms at NTP occupy a volume of

a)

(a) 11.2 liters

b)

(b) 44.8 liters

c)

(c) 2 liters

d)

(d) 22.4 litres

18.

a)

a

b)

b

c)

c

d)

d

19.

If the atomic weight of carbon were set at 24 amu, the value of the Avogadro constant would be,

a)

(a) $6.022\times10^{23}$

b)

b) $12.044\times10^{23}$

c)

c) $3.011\times10^{23}$

d)

d) None of these

20.

a)

a

b)

b

c)

c

d)

d

Mole Concept Practice Test 1

Total questions: 20

Worksheet time: 40mins

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