Everyday Salts — Homi Bhabha Class 9 Chemistry MCQs with Solutions
Free Homi Bhabha Class 9 Chemistry Everyday Salts MCQs with step-by-step solutions (10 questions). Part of Acids, Bases & Salts. Practise online on Prepizo — no login needed.
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Questions with solutions
Q1 — Everyday Salts · medium · theory
The chemical name of common table salt is:
A. sodium carbonate
B. sodium bicarbonate
C. sodium chloride ✓ Correct
D. calcium chloride
Solution: Common salt is sodium chloride (NaCl).
Q2 — Everyday Salts · medium · theory
Baking soda used in cooking is chemically:
A. calcium carbonate (CaCO₃)
B. sodium hydrogen carbonate (NaHCO₃) ✓ Correct
C. sodium chloride (NaCl)
D. sodium hydroxide (NaOH)
Solution: Baking soda is sodium hydrogen carbonate, NaHCO₃.
Q3 — Everyday Salts · hard · theory
Washing soda, used for cleaning, is chemically:
A. sodium carbonate (Na₂CO₃·10H₂O) ✓ Correct
B. sodium chloride
C. calcium hydroxide
D. sodium hydrogen carbonate
Solution: Washing soda is hydrated sodium carbonate, Na₂CO₃·10H₂O.
Q4 — Everyday Salts · hard · theory
Bleaching powder, used to disinfect water, is chemically:
A. sodium carbonate
B. sodium chloride
C. calcium oxychloride (CaOCl₂) ✓ Correct
D. calcium carbonate
Solution: Bleaching powder is calcium oxychloride, CaOCl₂.
Q5 — Everyday Salts · medium · theory
Plaster of Paris, used to support fractured bones, is obtained by heating:
A. baking soda
B. limestone only
C. gypsum ✓ Correct
D. common salt
Solution: Plaster of Paris is made by heating gypsum (calcium sulphate dihydrate).
Q6 — Everyday Salts · medium · theory
Baking soda is used in baking because on heating it releases ______, which makes the cake rise:
A. hydrogen
B. oxygen
C. carbon dioxide ✓ Correct
D. water vapour only
Solution: On heating, baking soda releases CO₂ gas, which makes the batter fluffy.
Q7 — Everyday Salts · easy · theory
The common salt sprinkled on food for taste is chemically known as:
A. Sodium chloride ✓ Correct
B. Calcium carbonate
C. Sodium bicarbonate
D. Sodium hydroxide
Solution: Common table salt is sodium chloride (NaCl), formed from hydrochloric acid and sodium hydroxide.
Q8 — Everyday Salts · easy · theory
Baking soda, which is used in cooking and also as a mild antacid, is chemically:
A. Calcium sulphate
B. Sodium hydrogen carbonate ✓ Correct
C. Sodium carbonate
D. Sodium chloride
Solution: Baking soda is sodium hydrogen carbonate (sodium bicarbonate, NaHCO3), a mild base used in cooking and to relieve acidity.
Q9 — Everyday Salts · medium · theory
Plaster of Paris, used by doctors to support fractured bones, sets into a hard solid when mixed with water because it:
A. Loses all of its water
B. Takes up water and changes back into gypsum ✓ Correct
C. Turns into common salt
D. Reacts with carbon dioxide in the air
Solution: Plaster of Paris reacts with water and rehydrates to form hard gypsum (calcium sulphate dihydrate), which is why the cast sets firm.
Q10 — Everyday Salts · hard · theory
Washing soda (sodium carbonate) dissolves in water to give a solution that turns red litmus blue. This tells us that the salt is:
A. Neutral, formed from a weak acid and a weak base
B. Basic, formed from a strong base and a weak acid ✓ Correct
C. Neutral, formed from a strong acid and a strong base
D. Acidic, formed from a strong acid and a weak base
Solution: Turning red litmus blue shows the solution is basic. Sodium carbonate is the salt of a strong base (sodium hydroxide) and a weak acid (carbonic acid), so its solution is basic.