JEE Main Chemistry question
Not in JEE Main or NEET syllabus
Which of the following statements are correct for alkali metal compounds? (i) Superoxides are paramagnetic in nature. (ii) The basic strength of hydroxides increases down the group. (iii) The conductivity of chlorides in their aqueous solutions decreases down the group. (iv) The basic nature of carbonates in aqueous solutions is due to cationic hydrolysis. [BITSAT 2008, AMU 2008, EAMCET 2008]
Solution
(i) is correct — the superoxide ion has an unpaired electron, making superoxides paramagnetic. (ii) is correct — basic strength of alkali metal hydroxides increases down the group as the bond becomes more ionic and easily broken. (iii) is false as stated: conductivity of alkali metal chlorides in
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