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Which of the following is radioactive ?...

Which of the following is radioactive ?

A

`Na^(23)`

B

`K^(39)`

C

`K^(40)`

D

`Ca^(40)`

Text Solution

Verified by Experts

The correct Answer is:
C
`._(19)K^(40)` is radioactive in nature.
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DINESH PUBLICATION-THE ALKALI METALS-RQ
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  2. Causticisation process is used for the preparation of

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  3. Which of the following is radioactive ?

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  4. When CO(2) is bubbled into an aqueous solution of Na(2)CO(3) the follo...

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  5. Chill salt petre is

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  6. Which of the following are arranged in correct increasing order of sol...

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  7. Alkali metals impart colour to Bunsen flame due to

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  8. Sodium metal cannot be stored under

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  9. Which of the following does not liberate O(2) in Bunsen burner ?

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  10. When NaCl is dissolved in water the sodium ion becomes

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  11. Among alkali metal salts, the lithium salts are the poore conductors o...

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  12. Which one of the following properties of alkali metals increases in ma...

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  13. Which one of the following atoms will have the smallest size ?

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  14. The formula of nitre is

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  15. The process associated with sodium carbonate manufacture is known as

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  16. Baking powder has one of the following constituents

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  17. Which of the following alkali metal hydroxides is the strongest base ?

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  18. Compared with the alkaline earth metals, the alkali metals exhibit

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  19. Which of the following oxides is formed when potassium metal is burnt ...

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  20. Which of the following compounds has the lowest anion to cation size r...

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