The amount of ${\mathrm{CO}}_2$ that can be produced when 2 moles of carbon are burnt in 16 g of dioxygen is:

1.	22 g	2.	44 g
3.	0.5 g	4.	11 g

The amount of copper (in grams) that can be obtained from 100 g of copper sulphate (CuSO₄) is:

1. Fe₃O₂

2. Fe₂O₃

3. Fe₂O₂

4. Fe₃O₄

The average atomic mass of chlorine using the following data would be:

1. 38.4527 u

2. 37.4527 u

3. 36.4527 u

4. 35.4527 u

Determine the number of moles of hydrogen atoms present in 3 moles of ethane (C₂H₆):

1. 18.069 × 10²³

2. 1.8 × 10²³

3. 18

4. 6 × 10²³

Find the concentration of sugar, C₁₂H₂₂O₁₁, in mol L⁻¹ when 20 g of sugar is dissolved in enough water to make 2 L of solution.

1. 0.29 mol/L

2. 0.029 mol/L

3. 0.35 mol/L

4. 0.032 mol/L

How much volume of methanol is needed to prepare 2.5 L of a 0.25 M solution, if the density of methanol is 0.793 kg/L?

1. 22.25 mL
2. 24.78 mL
3. 25.22 mL 
4. 28.52 mL

If the mass of air above a unit area at sea level is 1034 g cm⁻², what is the corresponding atmospheric pressure in pascal?

1. 1.01332 × 10⁵ Pa

2. 1.01332 × 10⁶ Pa

3. 1.01332 × 10⁷ Pa

4. 1.01332 × 10⁸ Pa

Which of the following is the SI unit of mass?

1. Kilogram (kg)

2. Gram (g)

3. Pascal (Pa)

4. Kilometres (km)

Which of the following correctly defines significant figures ?