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Out of Li, Na, K, Rb and Cs, how many of...

Out of Li, Na, K, Rb and Cs, how many of them directly form superoxides on heating with dioxygen?

Text Solution

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The correct Answer is:
3
`K,Rb,Cs`
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Knowledge Check

  • Assertion : K, Rb and Cs form superoxides. Reason : The stability of the superoxides increases from 'K' to 'Cs' due to decrease in lattice energy.

    A
    If both (A) and (R) are correct and (R) is the correct explanation of (A).
    B
    If both (A) and (R) are correct, but (R) is not the correct explanation of (A).
    C
    If (A) is correct, but (R) is incorrect.
    D
    If both (A) and (R) are incorrect.

  • There are 12 volleyball players in all in a college, out of which a team of 9 players is to be formed. If the captain always remains the same, then in how many ways can the team be formed?

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    36
    B
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    C
    99
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  • In how many ways a team of 11 players can be formed out of 25 players, if 6 out of them are always to be included and 5 are always to be excluded?

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    2020
    B
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