Which of the following statements are true?

CHEMISTRY · Multi correct · A Level · Chemistry · Group 2 elements (alkaline earth metals) · Group 2 elements (alkaline earth metals)

Problem

Which of the following statements are true? (1)

\text{NaHCO}_3

and

\text{KHCO}_3

have the same crystal structure. (2) On heating,

\text{Li}_2\text{CO}_3

gives

\text{Li}_2\text{O}

and

\text{CO}_2

. (3) Among alkali metals, Li has high ionisation energy and imparts no colour to a flame. (4)

\text{Li}_2\text{SO}_4

does not form an alum.