Question

Identify the correct statements about alkali metals
A. The order of standard reduction potential $\left( M ^{+} \mid M \right)$ for alkali metal ions is $Na > Rb > Li$.
B. $CsI$ is highly soluble in water.
C. Lithium carbonate is highly stable to heat.
D. Potassium dissolved in concentrated liquid ammonia is blue in colour and paramagnetic.
E. All the alkali metal hydrides are ionic solids.
Choose the correct answer from the options given below:

• A. C and E only
• B. A and E only
• C. A, B, D only
• D. A, B and E only

Answer 1

Answer: (B)

A and E only

Answer 2

The correct answer is (B) : A and E only
(1) Na>Cs>Li− true { If considered with sign } The low solubility of CsI is due to smaller hydration enthalpy of it's two ions Li2​CO3​ is highly stable to heat - false In Conc. NH3​,K formed blue solution - true All the alkali metal hydrides are ionic solid (True).