Science Practice Quiz 167

Q1.If soil becomes too acidic due to excessive use of chemical fertilisers, what is it treated with?

A. Organic matter B. Dilute acids C. Bases like quick lime D. Sodium chloride

Q2.What is the chemical name for quick lime, used in soil treatment?

A. Calcium hydroxide B. Calcium carbonate C. Calcium oxide D. Sodium oxide

Q3.What is the chemical name for slaked lime, used in soil treatment?

A. Calcium oxide B. Calcium carbonate C. Calcium hydroxide D. Magnesium hydroxide

Q4.How are acidic factory wastes treated before being allowed to flow into water bodies?

A. By adding more acid B. By diluting them with water C. By adding basic substances D. By heating them to high temperatures

Q5.What is the characteristic taste of acids?

A. Sour B. Bitter C. Salty D. Sweet

Q6.What change does a base cause in red litmus paper?

A. Turns it blue B. Turns it red C. Turns it green D. Has no effect

Q7.Substances that are neither acidic nor basic are known as what?

A. Neutral B. Indicators C. Salts D. Alkalis

Q8.What are substances called that show different colours in acidic, basic, and neutral solutions?

A. Indicators B. Neutralizers C. Catalysts D. Solvents

Q9.What is formed when an acid and a base neutralise each other?

A. A salt B. An indicator C. A catalyst D. A solvent

Q10.Based on its effect on red litmus, what is the nature of ammonia found in household products?

A. Basic B. Acidic C. Neutral D. Amphoteric