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Get Answers to all your Questions
- #Class 11
- #s- Block Elements ( Alkali and Alkaline earth metals )
- #Chemistry
- #Medical
- #National Eligilibility Cum Entrance Test
- #National Eligibility Cum Entrance Test
Identify the correct statement.
Option: 1
Except all the carbonates of alkali metals decompose on heating
Option: 2
Li does not form nitride on burning in air
Option: 3
Hydration energy of alkali metal ions increases down the group
Option: 4
Caesium and Potassium are used in photoelectric cell.
Answers (1)
decompose on heating to form
and
.
Lithium is the only alkali metal which readily reacts with nitrogen at room temperature and forms stable lithium nitride.
Hydration energy of alkali metal ions decreases down the group as the size of the ion increases.
Caesium and potassium are used as electrode in photoelectric cells because of their high electropositivity. They give up their valence shell electron with small amount of light.
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