A) \[NaHC{{O}_{3}}\] and \[KHC{{O}_{3}}\] have same crystal structure
B) On heating \[LiN{{O}_{3}}\] decomposes into \[L{{i}_{2}}O\] and \[N{{O}_{2}}\]
C) Among alkali metals, \[Li\] metal impart red colour to flame
D) \[L{{i}_{2}}S{{O}_{4}}\] does not form alum
Correct Answer: A
Solution :
[a] The crystal structures of \[NaHC{{O}_{3}}\] and \[KHC{{O}_{3}}\] both show hydrogen bonding but are different. In \[NaHC{{O}_{3}},\] the \[HCO_{3}^{-}\] ions are linked into an infinite chain, while in \[KHC{{O}_{3}},\] a dimeric anion is formed.
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