Which of the following statement(s) is/are correct regarding Li_2CO_3 and Na_2CO_3 ? (i) Sodium s...

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Which of the following statement(s) is/are correct regarding Li_2CO_3 and Na_2CO_3 ?
(i) Sodium salt evolve CO_2 at higher temperature.
(ii) Polarization of Na^+is lesser than that of Li^+.
(a) Both statements (i) and (ii) are correct
(b) Both statements (i) and (ii) are incorrect
(c) Statement (ii) is correct explanation for statement (i)
(d) Statement (i) is correct explanation for statement (ii)

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