Chapter 3: Acids Bases and Salts — Online MCQ Test
PHYSICAL SCIENCES · CLASS 10th · Telangana State Board
Practice Chapter 3: Acids Bases and Salts with a free chapter-wise online MCQ test.
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....
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Chapter 3: Acids Bases and Salts — Important Questions & Answers
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.
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 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
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.
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.
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.