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MODEL PAPER 6 — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceMODEL PAPER 61 Mark
MCQ
Assertion (A): Colour of copper sulphate solution changes when an iron nail is kept immersed in it.
Reason (R): The colour of copper sulphate solution changes when iron nail is kept immersed in it due to the decomposition reaction taking place between iron and copper leading to formation of iron sulphate.
  • A
    Both A and R are true and R is the correct explanation of A.
  • B
    Both A and R are true but R is not the correct explanation of A
  • ✓
    A is true but R is false.
  • D
    A is false but R is true.
✓

Answer

Correct option: C.
A is true but R is false.
(c) A is true but R is false.
Explanation: The colour of copper sulphate solution changes when iron nail is kept immersed in it due to the displacement reaction taking place between iron and copper leading to formation of iron sulphate. Thus assertion is true, but reason is false. 

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