Science Practice Quiz 43

Q1.What defines a substitution reaction?

A. Two or more reactants combine to form a single product. B. A single compound breaks down into two or more simpler substances. C. One type of atom or a group of atoms takes the place of another. D. A compound reacts with oxygen to produce heat and light.

Q2.When ethanoic acid reacts with a base such as sodium hydroxide, what are the primary products formed?

A. Salt and hydrogen gas B. Salt and oxygen gas C. Salt and water D. Acid and water

Q3.What is the common name for the salt produced when ethanoic acid reacts with sodium carbonate or sodium hydrogencarbonate?

A. Sodium chloride B. Sodium acetate C. Sodium bicarbonate D. Sodium hydroxide

Q4.Which of the following are the products when ethanoic acid reacts with carbonates and hydrogencarbonates?

A. Salt, hydrogen gas, and water B. Salt, carbon dioxide, and water C. Salt, oxygen gas, and water D. Salt, methane, and water

Q5.How does ethanoic acid behave when it reacts with a base like sodium hydroxide?

A. It acts as a strong reducing agent B. It acts like mineral acids C. It acts as a strong oxidising agent D. It acts as a neutral compound

Q6.What gas is produced when ethanoic acid reacts with sodium carbonate, as indicated by the chemical equation?

A. Hydrogen (H2) B. Oxygen (O2) C. Carbon dioxide (CO2) D. Nitrogen (N2)

Q7.According to Activity 4.9, what substance is used to test the gas produced when ethanoic acid reacts with sodium carbonate?

A. Distilled water B. Dilute hydrochloric acid C. Freshly prepared lime-water D. Sodium hydroxide solution

Q8.What is the chemical formula for sodium ethanoate, which is also commonly known as sodium acetate?

A. NaHCO3 B. NaOH C. CH3COONa D. Na2CO3

Q9.Activity 4.10, involving oil, water, and soap solution, is designed to illustrate the formation of what?

A. Precipitates B. Micelles C. Crystals D. Gases

Q10.What are soap molecules primarily composed of?

A. Sodium or potassium salts of long-chain carboxylic acids. B. Calcium or magnesium salts of short-chain fatty acids. C. Sulphur or phosphorus salts of aromatic compounds. D. Nitrogen or oxygen salts of branched-chain alcohols.

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Science Practice Quiz 43