MCQ Practice – Class 6 to 10

Q1. Which of the following gives CO2 with dilute acid?

A. NaCl B. Mg(OH)2 C. NaOH D. NaHCO3

Q2. Which of these is a strong acid?

A. Citric acid B. Carbonic acid C. Acetic acid D. Hydrochloric acid

Q3. Which of these acids is used in pickles?

A. Phosphoric acid B. Sulphuric acid C. Acetic acid D. Nitric acid

Q4. Which of these is NOT a property of bases?

A. Reacts with carbonates to give CO2 B. Turns red litmus blue C. Slippery to touch D. Bitter taste

Q5. Which of these is used to make toothpastes less acidic?

A. Acetic acid B. Baking soda C. Citric acid D. Salt

Q6. Bleaching powder is chemically:

A. CaSO4 B. Ca(OCl)2 C. Ca(OH)2 D. CaCO3

Q7. Bleaching powder is used for:

A. Strengthening metals B. Cooking C. Rust removal D. Disinfection

Q8. The chemical formula of washing soda is:

A. CaCO3 B. MgCO3 C. NaHCO3 D. Na2CO3·10H2O

Q9. The chemical formula of baking soda is:

A. CaCO3 B. NaHCO3 C. Na2CO3 D. NaCl

Q10. When CO2 is passed through limewater, it turns:

A. Milky B. Blue C. Yellow D. Red

Quiz – Acids, Bases and Salts