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:
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:
Show Hint
Reduction potential and solubility depend on ion size and hydration energy. Alkali metal hydrides are ionic due to electrostatic interactions.
- C and E only
- A and E only
- A, B, D only
- A, B and E only
The Correct Option is B
Solution and Explanation
• Statement A: True. The reduction potential follows the order Na > Rb > Li when considering their values.
• Statement B: False. CsI is not highly soluble in water due to weak hydration enthalpy of the large Cs+ ion.
• Statement C: False. Lithium carbonate decomposes on heating.
• Statement D: False. Potassium dissolved in ammonia is blue in colour and paramagnetic due to solvated electrons.
• Statement E: True. Alkali metal hydrides are ionic solids due to strong electrostatic forces.
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