Chapter Exam

Chapter 3: Acids Bases and Salts — Online MCQ Test

Q: Which of the following is an acidic salt?

Answer: C. Ammonium chloride — Ammonium chloride is formed from a weak base (NH₃) and strong acid (HCl), making it acidic in solution.

Q: What happens when zinc reacts with dilute sulfuric acid?

Answer: B. Zinc sulfate and hydrogen gas are produced — When zinc reacts with dilute sulfuric acid, it displaces hydrogen gas: Zn + H₂SO₄ → ZnSO₄ + H₂↑

Q: When a base reacts with an acid, the main products formed are _____ and water.

Answer: B. A salt — A neutralization reaction between an acid and a base produces a salt and water: Acid + Base → Salt + H₂O

Q: When bleaching powder reacts with dilute acid, which toxic gas is released?

Answer: B. Chlorine gas — Bleaching powder (calcium hypochlorite) reacts with dilute acids to release toxic chlorine gas (Cl₂), which must be handled carefully.

Q: A student dissolves substance P in water and finds that the temperature increases significantly. The solution turns red litmus blue. Which of the following is LEAST likely to be substance P?

Answer: B. Sulfuric acid — Sulfuric acid dissolving in water does release heat, but it turns blue litmus red (acidic), contradicting the observation. The red litmus turning blue indicates a basic substance, eliminating acid choices.

PHYSICAL SCIENCES · CLASS 10th · Telangana State Board

Practice Chapter 3: Acids Bases and Salts with a free chapter-wise online MCQ test for Telangana State Board CLASS 10th PHYSICAL SCIENCES. This chapter covers: Diving into chemical properties this chapter details the behavior of acids and bases in aqueous solutions their reactions with metals metal carbonates and hydrogen carbonates. Stud.... AI-generated questions from basic to board-exam level, with instant results and explanations.

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Chapter 3: Acids Bases and Salts — Important Questions & Answers (FAQ)

Frequently asked questions from Telangana State Board CLASS 10th PHYSICAL SCIENCES — Chapter 3: Acids Bases and Salts, with answers and explanations. These are sample questions; the exam has its own separate question set.

Which of the following is an acidic salt?

A. Sodium chloride
B. Sodium carbonate
C. Ammonium chloride ✓
D. Potassium nitrate

Answer: C. Ammonium chloride
Ammonium chloride is formed from a weak base (NH₃) and strong acid (HCl), making it acidic in solution.

What happens when zinc reacts with dilute sulfuric acid?

A. Zinc sulfate and oxygen gas are produced
B. Zinc sulfate and hydrogen gas are produced ✓
C. No reaction occurs
D. Zinc hydroxide and water are produced

Answer: B. Zinc sulfate and hydrogen gas are produced
When zinc reacts with dilute sulfuric acid, it displaces hydrogen gas: Zn + H₂SO₄ → ZnSO₄ + H₂↑

When a base reacts with an acid, the main products formed are _____ and water.

A. A gas
B. A salt ✓
C. An oxide
D. A hydroxide

Answer: B. A salt
A neutralization reaction between an acid and a base produces a salt and water: Acid + Base → Salt + H₂O

When bleaching powder reacts with dilute acid, which toxic gas is released?

A. Ammonia
B. Chlorine gas ✓
C. Oxygen gas
D. Nitrogen dioxide

Answer: B. Chlorine gas
Bleaching powder (calcium hypochlorite) reacts with dilute acids to release toxic chlorine gas (Cl₂), which must be handled carefully.

A student dissolves substance P in water and finds that the temperature increases significantly. The solution turns red litmus blue. Which of the following is LEAST likely to be substance P?

A. Sodium hydroxide
B. Sulfuric acid ✓
C. Calcium oxide
D. Ammonia solution

Answer: B. Sulfuric acid
Sulfuric acid dissolving in water does release heat, but it turns blue litmus red (acidic), contradicting the observation. The red litmus turning blue indicates a basic substance, eliminating acid choices.