CIE IGCSE Chemistry Quiz: Reversible Reactions & Equilibrium

What symbol is used to represent reversible reactions in chemical equations?

• ←

• →

• ↔

• ⇌

In the Haber process, what is produced from nitrogen and hydrogen?

• Water

• Sulfuric acid

• Ammonia

• Oxygen

What type of reaction occurs when hydrated copper(II) sulfate is heated?

• Combustion

• Neutral

• Endothermic

• Exothermic

According to Le Chatelier's principle, what happens when pressure is increased in a reaction?

• Temperature increases

• Equilibrium shifts to the right

• Equilibrium shifts to the left

• No change occurs

What is the catalyst used in the Haber process?

• Vanadium(V) oxide

• Nickel

• Iron

• Copper

What color change occurs when cobalt(II) chloride is hydrated?

• Pink to blue

• Blue to pink

• Colorless to yellow

• Yellow to brown

What is the effect of increasing temperature on an exothermic reaction at equilibrium?

• No effect

• Reaction stops

• Yield decreases

• Yield increases

What is the pressure used in the Haber process?

• 50 atm

• 1500 kPa

• 200 atm

• 100 kPa

What happens to the equilibrium position if the concentration of a product is increased?

• Shifts to the right

• Shifts to the left

• Reaches completion

• No change

What is the main product of the Contact process?

• Nitric acid

• Sulfuric acid

• Hydrochloric acid

• Phosphoric acid