Chapter Exam

Chapter-14 Acids and Bases — Online MCQ Test

Q: Which of the following is a common property of acids?

Answer: B. They turn blue litmus red — Acids change blue litmus paper to red. Bitter taste and soapy feel are properties of bases.

Q: Which of the following is a base?

Answer: C. Baking soda solution — Baking soda solution is basic in nature. Lemon juice, vinegar, and tamarind juice are acidic.

Q: An antacid tablet is used to relieve acidity in the stomach because it contains:

Answer: B. A base that neutralizes excess acid — Antacids are mild bases. They neutralize the excess hydrochloric acid in the stomach and give relief.

Q: Which statement is correct about acids and bases?

Answer: C. Bases feel soapy and slippery — Bases generally feel soapy and slippery. Acids are sour and turn blue litmus red.

Q: A substance gives the following results: it turns red litmus blue, turns turmeric reddish-brown, and feels slippery. Which one is it most likely to be?

Answer: C. Soap solution — These are all properties of a base. Soap solution is a common example of a basic substance.

SCIENCE · Samacheer Kalvi 8th · Tamil Nadu State Board

Practice Chapter-14 Acids and Bases with a free chapter-wise online MCQ test for Tamil Nadu State Board Samacheer Kalvi 8th SCIENCE. This chapter covers: acid base neutralization Covers properties uses and neutralization reactions of acids and bases. AI-generated questions from basic to board-exam level, with instant results and explanations.

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Chapter-14 Acids and Bases — Important Questions & Answers (FAQ)

Frequently asked questions from Tamil Nadu State Board Samacheer Kalvi 8th SCIENCE — Chapter-14 Acids and Bases, with answers and explanations. These are sample questions; the exam has its own separate question set.

Which of the following is a common property of acids?

A. They taste bitter
B. They turn blue litmus red ✓
C. They feel soapy to touch
D. They turn red litmus blue

Answer: B. They turn blue litmus red
Acids change blue litmus paper to red. Bitter taste and soapy feel are properties of bases.

Which of the following is a base?

A. Lemon juice
B. Vinegar
C. Baking soda solution ✓
D. Tamarind juice

Answer: C. Baking soda solution
Baking soda solution is basic in nature. Lemon juice, vinegar, and tamarind juice are acidic.

An antacid tablet is used to relieve acidity in the stomach because it contains:

A. An acid that increases digestion
B. A base that neutralizes excess acid ✓
C. A salt that makes the stomach stronger
D. An indicator that changes colour

Answer: B. A base that neutralizes excess acid
Antacids are mild bases. They neutralize the excess hydrochloric acid in the stomach and give relief.

Which statement is correct about acids and bases?

A. Acids are bitter and bases are sour
B. Acids turn red litmus blue
C. Bases feel soapy and slippery ✓
D. Bases turn blue litmus red

Answer: C. Bases feel soapy and slippery
Bases generally feel soapy and slippery. Acids are sour and turn blue litmus red.

A substance gives the following results: it turns red litmus blue, turns turmeric reddish-brown, and feels slippery. Which one is it most likely to be?