Assertion: In the titration of `Na_(2)CO_(3)` with `HCl` using methyl orange indicator, the volume of acid required is twice that of the acid required using phenolphthalein as indicaton. Reason: Two moles of `HCl` are required for the complete neutralisation of one mole of `Na_(2)CO_(3)`.
A
Statement I is true, Statement II is true, Statement II is the correct explanation of Statement I.
B
Statement I true, Statement II is true, Statement II is not the correct explanation of Statement I.
C
Statement I is true, Statement II is false
D
Statement I is false, Statement II is true.
Text Solution
Verified by Experts
The correct Answer is:
B
Both assertion and reason are factually true but the reason does not exactly explain the assertion. The correct explanation is, methyl orange and phenolphthalein changes their colour at different `pH`.
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