Class 10 • Chemistry • Chapter 2
Acids, Bases and Salts
True & False Quiz
Neutralise. Ionise. Indicate.
✓True
✗False
25
Questions
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Ch.2
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Why True & False for Acids, Bases and Salts?
How this format sharpens your conceptual clarity
🔵 Acids and bases govern biological processes, digestion, soil chemistry, and industrial manufacturing — foundational for chemistry.
✅ T/F tests pH scale direction, neutralisation, properties of acids/bases with indicators, and salt formation rules.
🎯 pH < 7 = acidic; pH = 7 = neutral; pH > 7 = basic — the scale runs 0–14, NOT negative to positive.
📋
Read each statement carefully. Click True or False — instant feedback with explanation appears. Submit anytime; unattempted questions are marked Skipped.
Q 1
All acids turn blue litmus red.
Q 2
Bases are bitter in taste and feel soapy to touch.
Q 3
Common salt is a neutral salt.
Q 4
Hydrochloric acid is present in the human stomach.
Q 5
Sodium hydroxide is an acid.
Q 6
All acids are corrosive in nature and dangerous to handle.
Q 7
Baking soda is used for making cakes and is a base.
Q 8
The pH value of a neutral solution is always 7.
Q 9
Phenolphthalein remains colourless in acidic and turns pink in basic solutions.
Q 10
Acetic acid is a strong acid.
Q 11
Calcium oxide reacts with water to form calcium hydroxide (slaked lime).
Q 12
Lemon juice contains citric acid which is responsible for its sour taste.
Q 13
The chemical formula of common salt is \(\mathrm{Na_2SO_4}\).
Q 14
Acids react with metals to evolve hydrogen gas.
Q 15
Tooth decay is caused when the pH inside the mouth falls below 5.5.
Q 16
Soluble bases are called acids.
Q 17
Blue litmus remains blue in basic solution.
Q 18
Non-metallic oxides are generally acidic in nature.
Q 19
The formula of Plaster of Paris is \(\mathrm{CaSO_4.\frac{1}{2}H_2O}\).
Q 20
The pH of a strongly basic solution is less than 7.
Q 21
Washing with plenty of water and applying baking soda is recommended for acid spills on skin.
Q 22
Vinegar smells like acetic acid.
Q 23
Ammonium chloride \(\mathrm{ (NH_4Cl)}\) is a neutral salt.
Q 24
Bleaching powder is used for disinfecting drinking water.
Q 25
The pH scale ranges from 0 (most acidic) to 14 (most basic).
Key Takeaways — Acids, Bases and Salts
Core facts for CBSE Boards & exams
1
Acids produce H⁺ ions in water; bases produce OH⁻ ions.
2
pH < 7 (acidic), pH = 7 (neutral), pH > 7 (basic/alkaline).
3
Neutralisation: Acid + Base → Salt + Water (exothermic).
4
Strong acids (HCl, H₂SO₄, HNO₃) fully ionise; weak acids (CH₃COOH) partially ionise.
5
Litmus: red in acid, blue in base; Phenolphthalein: colourless in acid, pink in base.
6
Baking soda = NaHCO₃; Washing soda = Na₂CO₃·10H₂O; Bleaching powder = Ca(OCl)Cl.