Chemical Properties — Homi Bhabha Exam Chemistry MCQs with Solutions
Free Homi Bhabha Exam Chemistry Chemical Properties MCQs with step-by-step solutions (6 questions). Part of Acids, Bases & Salts. Practise online on Prepizo — no login needed.
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Questions with solutions
Q1 — Chemical Properties · medium · theory
When a dilute acid reacts with an active metal, the gas evolved is:
A. hydrogen ✓ Correct
B. nitrogen
C. oxygen
D. carbon dioxide
Solution: Acid + metal → salt + hydrogen gas.
Q2 — Chemical Properties · hard · theory
The gas evolved when an acid reacts with a metal carbonate (e.g. limestone) is:
A. carbon dioxide ✓ Correct
B. oxygen
C. chlorine
D. hydrogen
Solution: Acid + carbonate → salt + water + carbon dioxide, which turns lime water milky.
Q3 — Chemical Properties · medium · theory
The reaction of an acid with a base to form salt and water is called:
A. displacement
B. oxidation
C. neutralisation ✓ Correct
D. sublimation
Solution: Acid + base → salt + water is a neutralisation reaction.
Q4 — Chemical Properties · hard · theory
The gas produced when a metal reacts with an acid is tested by bringing a burning splint near it; a positive test gives:
A. a milky colour
B. a "pop" sound ✓ Correct
C. a red colour
D. a green flame
Solution: Hydrogen gas burns with a characteristic "pop" sound.
Q5 — Chemical Properties · hard · theory
Acids conduct electricity in aqueous solution because they:
A. are metals
B. produce no ions
C. produce ions (H⁺) in water ✓ Correct
D. contain oxygen only
Solution: Acids ionise in water to give mobile ions (including H⁺), which carry the current.
Q6 — Chemical Properties · medium · theory
Which gas turns lime water milky?
A. Oxygen
B. Hydrogen
C. Ammonia
D. Carbon dioxide ✓ Correct
Solution: Carbon dioxide reacts with lime water to form calcium carbonate, turning it milky.