A compound contains 4.07% hydrogen, 24.27% carbon and 71.65% chlorine. Its molar mass is 98.96 g. Its empirical and molecular formulas are respectively -

1. CH₂Cl and C₂H₄Cl₂

2. CH₃Cl and C₂H₆Cl₂ 

3. C₂HCl and C₄H₂Cl₂ 

4. C₂HCl and C₂H₄Cl₂ 

The amount of water vapour produced by the complete combustion of 16 g of methane is:

1. 9 g
2. 18 g
3. 36 g
4. 27 g

The number of moles of methane are required to produce 22g CO_2(g) after complete combustion is-

1. 1 mol

2. 0.5 mol

3. 1.5 mol

4. 2 mol

When 50.0 kg of nitrogen gas (N₂) and 10.0 kg of hydrogen gas (H₂) are combined, what is the quantity of ammonia gas (NH₃) produced?

1. 33.0 ×10³ mol

2. 56.1×10³ g

3. 6.5 ×10³ g

4. None of the above

A solution is prepared by adding 2 g of substance A to 18 g of water. The mass percent of the solute is-

1. 20%

2. 10%

3. 15%

4. 18%

NaOH solution prepared by dissolving its 4 g in enough water to form 250 mL of the solution. The molarity of NaOH solution is-

1. 0.4 M

2. $\frac{1}{0.4}\mathrm{M}$

3. 0.8 M
4. $\frac{1}{0.8}\mathrm{M}$

Calculate the molality for a 3 M NaCl solution with a density of 1.25 g mL^–1.

1. 2.79 M

2. 1.79 M

3. 2 M

4. 1 M

The molecular mass of the glucose (C₆H₁₂O₆) is:

1. 178.156 u
2. 182.162 u
3. 181.142 u
4. 180.162 u

A jug contains 2L of milk. The volume of the milk in m³ is:

1. 2 × 10^–3

2. 2 × 10⁴

3. 2 × 10²

4. 2 × 10⁵