JEE Mains · Chemistry · STD 12 - 4. d and f- block elements
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 and paramagnetic.
E. All alkali metal hydrides are ionic solids.
Choose the correct answer from the options given below
- A A, B, D only
- B C and E only
- C A and E only
- D A, B and E only
Answer & Solution
Correct Answer
(C) A and E only
Step-by-step Solution
Detailed explanation
(1) \(Na > Cs > Li\) - true \{If considered with sign\} The low solubility of Csl is due to smaller hydration enthalpy of it's two ions. \(Li _2 CO _3\) is highly stable to heat - false. In Conc. \(NH _3, K\) formed blue solution - true All the alkali metal hydrides are ionic…
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