1. If \[3.01 ×10^{20}\] molecules are removed from 98 mg of \[H_{2}SO_{4}\] , then the number of moles of \[H_{2}SO_{4}\] left are

a) \[0.1 ×10^{-3}\]

b) \[0.5 ×10^{-3}\]

c) \[1.66 ×10^{-3}\]

d) \[9.95 ×10^{-2}\]

Explanation:

2. 25.4 g of \[I_{2}\] and 14.2 g of \[Cl_{2}\] are made to react completely to yield a mixture of \[ICl\] and \[ICl_{3}\] . Calculate moles of \[ICl\] and \[ICl_{3}\] formed

a) 0.1, 0.1

b) 0.2, 0.2

c) 0.1, 0.2

d) 0.2, 0.1

Explanation:

3. 2 g of a mixture of \[CO and CO_{2}\] on reaction with excess I_{2}O_{5} produced \[2.54 g of I_{2}\] . What be the mass % of \[CO_{2}\] in the original mixture ?

a) 35

b) 70

c) 30

d) 90

Explanation:

4. The hydrated salt \[Na_{2}CO_{3}.xH_{2}O\] undergoes 63% loss in mass on heating and becomes anhydrous. The value of x is

a) 10

b) 7

c) 5

d) 3

Explanation:

5. Gastric juice contains 3.0 g of HCl per litre. If a person produces 2.5 litre of gastric juice per day. How many antacid tablets each containing 400 mg of \[Al\left(OH\right)_{3}\] are needed to neutralize all the HCl produced in one day ?

a) 18

b) 14

c) 20

d) 17

Explanation:

6. Sulfuryl chloride \[\left(SO_{2}CI_{2}\right)\] reacts with water to give a mixture of \[H_{2}SO_{4}\] and HCl. How many moles of baryta would be required to neutralize the solution formed by adding
4 mol of \[SO_{2}CI_{2}\] to excess of water ?

a) 1

b) 2

c) 3

d) 4

Explanation:

7. A chloride of a metal (M) contain 65.5% of chlorine. 100 ml of vapour of the chloride of metal at STP weights 0.72 g. The molecular formula of the metal chloride is

a) \[MCl_{4}\]

b) \[MCl_{3}\]

c) \[MCl_{2}\]

d) MCl

Explanation: Molecular weight of metal chloride

8. 7.36 g of a mixture of KCl and KI was dissolved in \[H_{2}O\] to prepare 1 litre solution. 25 ml of this required 8.45 ml of 0.2 N \[AgNO_{3}\] , what are % of KI in mixture ?

a) 57.28

b) 47.28

c) 5.72

d) 49.12

Explanation:

9. When burnt in air, 14.0 g mixture of carbon and sulphurgives a mixture of \[CO_{2} and SO_{2}\] in the volume ratio of 2 : 1, volume being measured at the same conditions of temperature and pressure moles of carbon in the mixture is

a) 0.75

b) 0.5

c) 0.40

d) 0.25

Explanation:

10. A gas mixture of 3 litres of propane \[\left(C_{3}H_{8}\right)\] and butane \[\left(C_{4}H_{10}\right)\] on complete combustion at 25° C produced 10
litre \[CO_{2}\] . Find out the composition of gas mixture (Propane : Butane)

a) 2 : 1

b) 1 : 2

c) 1.5 : 1.5

d) 0.5 : 2.5

Explanation: