Question

Consider the following Statement-I: Alkali metals dissolve in liquid ammonia and form deep blue solutions.
Statement-II: The order of melting and boiling points of alkali metal halides follow the trend:
Fluoride< chloride< bromide< iodide.

• A. Both Statement-I and Statement-II are correct
• B. Statement-I is correct, but Statement-II is not correct
• C. Statement-I is not correct, but Statement-II is correct
• D. Both Statement-I and Statement-II are not correct

Hint:

Memorize the correct trend of melting and boiling points for alkali halides: smaller anions (like F\(^-\)) lead to stronger ionic bonds and higher melting points.

Answer 1

The Correct Option is B

Statement-I: True. Alkali metals indeed dissolve in liquid ammonia, producing a deep blue solution due to the formation of solvated electrons.
Statement-II: False. The correct trend for melting and boiling points of alkali metal halides is:
\textit{Fluoride>chloride>bromide>iodide}, as the lattice energy decreases down the group due to increasing anion size.