Identify the correct statements about alkali metals. A. The order of standard reduction potential (M+ | M) for alkali metal ions is Na Rb Li B. CsI is highly soluble in water C. Lithium carbonate

Question

Identify the correct statements about alkali metals. A. The order of standard reduction potential (M+ | M) 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 option below.

(A) C and E only
(B) A and E only
(C) A, B & D only
(D) A, B and E only

Prashant Kotian · Accepted Answer

Correct answer: B. (A) / M M E  order of alkali metal ion is Na > Rb > Li (B) CsI is not highly soluble in water (C) Lithium carbonate decomposes on heating Li2CO3   Li2O + CO2(g) (D) K + (x + y) NH3   [M(NH3)x]+ + [e–(NH3)y]– In dilute ammonia solution it gives blue colour and paramagnetic in nature but in concentrated ammonia solution it gives copper bronze colour and diamagnetic in nature. (E) All alkali metal hydrides are ionic in nature.

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