1. Tardigrade
  2. Question
  3. Chemistry
  4. Identify the correct statements about alkali metals. A. The order of standard reduction potential ( M + mid 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 options given below:

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Q. 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:

JEE MainJEE Main 2023The s-Block Elements

Solution:

(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 $Li _2 CO _3$ is highly stable to heat - false In Conc. $NH _3, K$ formed blue solution - true All the alkali metal hydrides are ionic solid (True).