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Assertion : All alkali metals do not for...

Assertion : All alkali metals do not form superoxides as one of the main products in excess of air on heating.
Reason : Superoxide reacts with carbon monoxide producing a white powder and liberating dioxygen.

A

If both assertion and reason are true and the reason is the correct explanation of the assertion.

B

If both assertion and reason are true but reason is not the correct explanation of the assertion

C

If assertion is true but reason is false.

D

If assertion is false but reason is true.

Text Solution

Verified by Experts

The correct Answer is:
C
Assertion `:` Bigger cations form super oxides as they are stabilised by bigger anion, `i.e., O_(2)^(-)` through crystal lattice effect.
Reason `: KO_(2)+CO rarr K_(2)CO_(3),`
`4KO_(2)+2CO_(2) rarr 2K_(2)CO_(3)(s) +3O_(2)(g)`
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Name the alkali metals which form superoxides when heated in excess of air.

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