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Study the Assertion and Reason and choose the correct option.
Magnesium metal can liberate gas from an aqueous solution of .
Assertion: Magnesium metal can liberate $\text{H}_2$ gas from an aqueous solution of $\text{HCl}$.
Reason: Magnesium has positive value of standard reduction electrode potential.
- aBoth Assertion and Reason are true, and Reason is the correct explanation for Assertion.
- bBoth Assertion and Reason are true, but Reason is not the correct explanation for Assertion.
- cAssertion is true and Reason is false.
- dBoth Assertion and Reason are false.
Answer
Answer
Official answer keyCorrect option: c
(c) Assertion is true and Reason is false. Mg liberates $\text{H}_2$ from HCl because its standard reduction potential is negative ($-2\cdot37\text{ V}$), not positive.
From ISC 2027 Specimen Chemistry Paper 1, question 1(B)(vii).