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Identify the correct statements about alkali metals.
A. The order of standard reduction potential $(M^{+} ∣ M)$
for alkali metal ions is $N a > R b > L i$ .
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.

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A, B, D only

A and E only

C and E only

A, B and E only

answer is B.

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Detailed Solution

(A) SRP of Li = -3.04
SRP of Na = -2.715
SRP of Rb = -2.9
(B) CsI is least soluble
(C) ${Li}_{2} {CO}_{3}$ is not stable to heat
(E) All the alkali metal hydrides are ionic and having high melting points.

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