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Which of the following has an unpaired e...

Which of the following has an unpaired electron in it

A

`K_(2)O`

B

`K_(2)O_(2)`

C

`KO_(2)`

D

`Na_(2)O`

Text Solution

Verified by Experts

The correct Answer is:
C
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ALLEN-S-BLOCK ELEMENTS -EXERCISE
  1. On electrolysis of fused NaCI the final product is-

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  2. Increasing order of stability of- I. K(2)CO(3) II. MgCO(3) III Na(2)...

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  3. Which of the following has an unpaired electron in it

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  4. A compound which on hydrolysis releases ammonia is-

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  5. The metal ion which does not give any flame colouration is-

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  6. Which of the following exists as hydrated salt-

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  7. NaHCO(3) can be used to-

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  8. Strong reductant in IIA and IA group is-

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  9. The sulphate of which metal does not form alum:-

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  10. The electrolytic reduction process is used for alkali metals, because:...

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  11. Which statement is false for an element, having 2,8,8,2 electronic con...

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  12. Mostly metals are hard, but metals of Ist A group are soft, because:-

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  13. The normal dehydrating agent, which used in a laboratories:-

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  14. What is the decreasing order of standard oxidation potential of K,Ca a...

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  15. Which statement will be true for solution, when Ba is dissolved in amm...

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  16. Alkaline earth metals show:-

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  17. In K,Rb and Cs, the decreasing order of reducing power in gaseous stat...

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  18. Prefix 'Alkali' denotes for:-

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  19. Which of the following is the weakest base:-

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  20. The correct order of density of following elements is: -(Be,Mg,Ca,Sr)

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