Acidic Substances — Homi Bhabha Class 6 Chemistry MCQs with Solutions
Free Homi Bhabha Class 6 Chemistry Acidic Substances MCQs with step-by-step solutions (10 questions). Part of Acids, Bases and Neutralization. Practise online on Prepizo — no login needed.
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Questions with solutions
Q1 — Acidic Substances · easy · theory
Acids usually have a ___ taste.
A. Sour ✓ Correct
B. Sweet
C. Salty
D. Bitter
Solution: Acidic foods like lemon and tamarind taste sour, which is a common sign of an acid.
Q2 — Acidic Substances · easy · theory
The acid found in lemon and orange is:
A. Formic acid
B. Citric acid ✓ Correct
C. Acetic acid
D. Lactic acid
Solution: Citrus fruits such as lemon and orange contain citric acid.
Q3 — Acidic Substances · easy · theory
Vinegar, used in cooking and pickles, contains:
A. Acetic acid ✓ Correct
B. Sulphuric acid
C. Nitric acid
D. Citric acid
Solution: Vinegar is a dilute solution of acetic acid, which gives it a sour taste and smell.
Q4 — Acidic Substances · easy · theory
Which of these is an acidic substance?
A. Soap
B. Lemon juice ✓ Correct
C. Lime water
D. Baking soda
Solution: Lemon juice is acidic (sour). Soap, baking soda and lime water are all basic.
Q5 — Acidic Substances · medium · theory
Curd and buttermilk taste a little sour because they contain:
A. Citric acid
B. Lactic acid ✓ Correct
C. Formic acid
D. Tartaric acid
Solution: Milk turns into curd when bacteria form lactic acid, which makes it sour.
Q6 — Acidic Substances · medium · theory
The sour taste of tamarind (imli) is mainly due to:
A. Acetic acid
B. Lactic acid
C. Tartaric acid ✓ Correct
D. Formic acid
Solution: Tamarind contains tartaric acid, which gives it a strong sour taste.
Q7 — Acidic Substances · medium · theory
When an ant bites, it injects an acid that causes a burning feeling. This acid is:
A. Citric acid
B. Carbonic acid
C. Formic acid ✓ Correct
D. Acetic acid
Solution: An ant sting contains formic acid, which irritates the skin and causes burning.
Q8 — Acidic Substances · medium · theory
Our stomach makes an acid that helps to digest food. It is:
A. Nitric acid
B. Hydrochloric acid ✓ Correct
C. Tartaric acid
D. Citric acid
Solution: The stomach produces hydrochloric acid, which helps break down the food we eat.
Q9 — Acidic Substances · hard · theory
A strip of blue litmus paper is dipped into orange juice. What will happen?
A. It stays blue
B. It turns green
C. It turns black
D. It turns red ✓ Correct
Solution: Orange juice is acidic (citric acid), so it turns blue litmus red.
Q10 — Acidic Substances · hard · theory
A fizzy cold drink (soda) is acidic mainly because it contains:
A. Lactic acid
B. Carbonic acid ✓ Correct
C. A base
D. Common salt
Solution: Carbon dioxide gas dissolved in the drink forms carbonic acid, making it fizzy and acidic.