Worksheets: Acids Bases and Salts

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WORKSHEET – CHAPTER 2: ACIDS, BASES AND SALTS

SECTION A – MULTIPLE CHOICE QUESTIONS (20 MCQs)

An acid is a substance that produces:
a) OH⁻ ions
b) H⁺ ions
c) O²⁻ ions
d) H₂ molecules
Bases turn red litmus:
a) Blue
b) Green
c) Colourless
d) Purple
Which of the following is a strong acid?
a) HCl
b) CH₃COOH
c) H₂O
d) NH₄OH
The pH of a neutral solution is:
a) 0
b) 7
c) 10
d) 14
Which acid is present in vinegar?
a) HCl
b) H₂SO₄
c) CH₃COOH
d) HNO₃
When an acid reacts with a metal, the gas formed is:
a) O₂
b) CO₂
c) H₂
d) N₂
Milk of magnesia is used to:
a) Increase acidity
b) Neutralise acidity
c) Oxidise food
d) Convert base into salt
Which of the following has pH < 7?
a) NaOH
b) KOH
c) Lemon juice
d) Baking soda
Common salt is chemically known as:
a) NaCl
b) Na₂CO₃
c) NaHCO₃
d) CaOCl₂
Baking soda is:
a) NaCl
b) NaHCO₃
c) Na₂CO₃
d) CH₃COOH
Blue litmus turns red in:
a) Base
b) Salt
c) Acid
d) Distilled water
Which of the following is a basic oxide?
a) CO₂
b) SO₂
c) MgO
d) NO₂
The gas evolved when acids react with carbonates is:
a) H₂
b) O₂
c) CO₂
d) N₂
Plaster of Paris contains:
a) CaSO₄·2H₂O
b) CaSO₄·½H₂O
c) CaCO₃
d) CaO
Phenolphthalein turns pink in:
a) Acid
b) Base
c) Salt
d) Distilled water
A solution with pH = 11 is:
a) Strongly acidic
b) Weakly acidic
c) Weakly basic
d) Strongly basic
Which salt is used in cold packs?
a) NaCl
b) NH₄Cl
c) Na₂CO₃
d) K₁₂Cr₂O₇
Which of the following can be both acidic and basic?
a) Water
b) Aluminium oxide
c) Sodium hydroxide
d) Calcium oxide
Bleaching powder is chemically:
a) CaOCl₂
b) CaCl₂
c) CaCO₃
d) Ca(OH)₂
Formation of a salt occurs during:
a) Neutralisation
b) Decomposition
c) Oxidation
d) Reduction

SECTION B – ASSERTION & REASON (10 Questions)

A: Acids produce H⁺ ions in aqueous solution.
R: Water is essential for ionisation of acids.
A: Bases are bitter in taste.
R: Bases turn blue litmus red.
A: pH less than 7 indicates acidity.
R: Concentration of H⁺ ions is high below pH 7.
A: HCl is a strong acid.
R: It completely dissociates in water.
A: Baking soda is used in antacid tablets.
R: It neutralises excess acid in the stomach.
A: Bleaching powder is used for disinfection.
R: It releases chlorine on reaction with water.
A: CO₂ gas turns limewater milky.
R: CaCO₃ forms and is white in colour.
A: Plaster of Paris hardens on adding water.
R: It converts into gypsum by hydration.
A: Acids react with metal carbonates to produce CO₂.
R: Carbonates contain CO₃²⁻ ions.
A: Sodium hydroxide is a strong base.
R: It releases OH⁻ ions completely in water.

SECTION C – ONE-WORD / VERY SHORT ANSWERS (10)

Define acid.
What is the pH of neutral solution?
Name the acid in lemon.
Name the base in milk of magnesia.
Write chemical formula of bleaching powder.
Write chemical formula of baking soda.
What happens when acid reacts with metal?
What is brine?
Name one natural indicator.
Write the full form of POP.

SECTION D – SHORT ANSWER QUESTIONS (8)

Explain the action of indicators on acids and bases.
Why does dry HCl gas not show acidic behaviour?
Write balanced equations:
(a) NaOH + HCl →
(b) Zn + H₂SO₄ →
What is neutralisation? Give one example.
Explain the importance of pH in digestion.
Why does tooth enamel get damaged by acids?
What is a salt? Give examples of acidic, basic and neutral salts.
Write the uses of baking soda and washing soda.

SECTION E – LONG ANSWER QUESTIONS (5)

Explain the chemical properties of acids with suitable equations.
Describe the properties and uses of bleaching powder, baking soda, and washing soda.
Explain the importance of pH in daily life.
Describe how salts are prepared. Explain the preparation of three salts with equations.
What is plaster of Paris? How is it prepared? Discuss its uses and setting process.

📚 इस Chapter की Best Books:

✅ Oswaal Class 10 SST — Topper's Choice
✅ Together With SST — Best for Practice
✅ Oswaal Science Class 10 — Chapter Wise
✅ RD Sharma Maths — Most Popular