🧪 Class 10 Chemistry – MCQ Practice
Q1. Which reaction is CaO + H₂O → Ca(OH)₂ ?
A. Decomposition
B. Combination
C. Displacement
D. Neutralisation
A. Decomposition
B. Combination
C. Displacement
D. Neutralisation
✔ Answer: B. Combination Reaction
Q2. Rust of iron is:
A. FeO
B. Fe₂O₃·xH₂O
C. Fe₃O₄
D. Fe(OH)₂
A. FeO
B. Fe₂O₃·xH₂O
C. Fe₃O₄
D. Fe(OH)₂
✔ Answer: B. Fe₂O₃·xH₂O
Q3. Which compound gives H⁺ ions in water?
A. NaOH
B. NH₄OH
C. HCl
D. NaCl
A. NaOH
B. NH₄OH
C. HCl
D. NaCl
✔ Answer: C. HCl