If 10 volumes of H₂ gas react with 5 volumes of O₂ gas, the volumes of water vapor produced would be:

1. 9

2. 8

3. 10

4. 11

Suppose the elements X and Y combine to form two compounds XY₂ and X₃Y₂. If 0.1 mole of XY₂ weighs 10 g and 0.05 mole of X₃Y₂ weighs 9 g, the atomic weight of X and Y respectively, will be:

The volume of oxygen gas (O₂) needed to completely burn 1 L of propane gas (C₃H₈)  (both O₂ & propane measured at 0°C and 1 atm) will be:
1. 7 L
2. 6 L
3. 5 L
4. 10 L

25.4 g of ${\mathrm{I}}_2$ and 14.2 g  of ${\mathrm{Cl}}_2$ are made to react completely to yield a mixture of ICI and ICI₃. The mole of ICI and ICI₃ formed, is respectively -

1. 0.5, 0.2

2. 0.1, 0.1

3. 0.1, 0.3

4. 0.3, 0.4

10 g of a silver coin, when dissolved completely in excess of conc. HNO₃ gives 8.5 g of silver nitrate.
The percentage purity of the coin is:
(Molar mass of silver is 108g)
 

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

When 1 mole of ammonia and 1 mole of O₂  reacts to completion, then:

Consider the given reaction, 2SO₂ + O₂ $\to$2SO₃ 

6.4 g SO₂ and 3.2 g O₂ to form SO₃ . The mass of SO₃ formed is:  

1. 32 g
2. 16 g
3. 8 g
4. 4 g

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

1. 2 mol

2. 3 mol

3. 4 mol

4. 1 mol

A mixture of 2.3 g formic acid and 4.5 g oxalic acid is treated with conc. ${\mathrm{H}}_2{\mathrm{SO}}_4$. The evolved gaseous mixture is passed through KOH pellets.

Weight (in g) of the remaining product at STP will be:

1. 1.4

2. 3.0

3. 2.8

4. 4.4