Test on Neutralisation Reactions: Acids and Alkalis

Question 1: Universal indicator is used to measure the pH of soil in neutralisation experiments.

A. Ano

B. Ne

Explanation: The study materials state that neutralisation can be carried out in the laboratory and that 'The pH is measured using universal indicator' in this context (Photo D). For soil, farmers and gardeners 'test the pH of their soils', but the method of testing is not specified as universal indicator for soil.

Question 2: The neutralisation of an acid and an alkali only produces a new salt as a substance.

A. Ano

B. Ne

Explanation: The study materials state that the neutralisation of an acid and an alkali forms new substances, specifically identifying both salt and water as products. For example, hydrochloric acid and sodium hydroxide produce sodium chloride (a salt) and water.

Question 3: According to Table A, which of the following crops thrive in a soil pH range between 5.8 and 7.0?

A. Cauliflower

B. Mushrooms

C. Onions

D. Leeks

Explanation: Table A indicates that cauliflower grows best in a pH range of 6.0-7.0, and onions grow best in a pH range of 6.2-6.8. Both of these ranges fall within the 5.8-7.0 pH range. Mushrooms prefer 7.0-8.0, and leeks prefer 5.0-6.0, neither of which are fully within the specified range.

Question 4: According to the study materials, which statement correctly describes the convention for writing word equations?

A. The new substances (products) are written on the left, and the starting substances (reactants) are written on the right.

B. The starting substances (reactants) are written on the left, an arrow points to the new substances (products) written on the right.

C. The new substances (products) are written on the left, and an arrow points to the starting substances (reactants) written on the right.

D. Only the reactants are written in the equation, as products are understood.

Explanation: The study materials state: 'The convention (set of rules) for writing word equations is: the starting substances, the reactants, are written on the left. then there is an arrow, pointing to the new substances formed the new substances, the products, are written on the right.'

Question 5: The reaction between sulfuric acid and iron oxide to remove rust from metal surfaces is a neutralisation reaction.

A. Ano

B. Ne

Explanation: The study materials state that 'Sulfuric acid can attack the rust and remove it from the surface via a neutralisation reaction.'