Higher Chemistry - Unit 3 Revision

Which of the following gas samples has the same volume as 4 g of Methane (CH₄)?

All measured at standard temperature and pressure

• 1.0 g of Helium

• 1.0 g of Hydrogen

• 3.5 g of Nitrogen

• 35.5 g of Chlorine

• 0.05 mol of carbon dioxide is produced

• 0.06 mol of magnesium nitrate is produced

• Magnesium carbonate is in excess by 0.02 mol

• Nitric acid is in excess by 0.01 mol

• 69.9 %

• 62.8 %

• 58.2 %

• 32.5 %

• 300 cm³

• 400 cm³

• 700 cm³

• 800 cm³

• 30 %

• 54 %

• 67 %

• 150 %

In which of the following reactions would the yield of product be increased by lowering the pressure?

• H₂(g) + I₂(g) ⇌ 2HI(g)

• N₂(g) + 3H₂(g) ⇌ 2NH₃(g)

• N₂O₄(g) ⇌ 2NO₂(g)

• CO(g) + 2H₂(g) ⇌ CH₃OH(g)

Under the same conditions of temperature and pressure, which of the following gases would occupy the largest volume?

• 0·20 g of hydrogen

• 0·44 g of carbon dioxide

• 0·60 g of neon

• 0·80 g of argon

• 50

• 100

• 200

• 400

• hydrogen

• hydrogen chloride

• sodium chloride

• sodium hydroxide

• A

• B

• C

• D