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Which of the following s-block metals do...

Which of the following s-block metals do not impart any colour to the flame-

A

`Li,Be`

B

`Cs,Fr`

C

`Be,Mg`

D

`Ba,Ra`

Text Solution

Verified by Experts

The correct Answer is:
C
`Be, Mg` due to higher value of IP.
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ALLEN-S-BLOCK ELEMENTS -EXERCISE
  1. Which of the following properties of IA group metals increases as the ...

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  2. The hydride ion H^(-) is stronger base than its hydroxide ion OH^(-). ...

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  3. Which of the following s-block metals do not impart any colour to the ...

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  4. The metal extracted by electrolysis of its fused salt is:-

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  5. Lime stone is:-

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  6. Be(IIA) shows different behaviour as compared to other elements of the...

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  7. Which cannot be used to generate H(2)?

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  8. Only those elements of s-block can produce superoxides which have:-

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  9. In the Down's method for the extraction of sodium, the melting point o...

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  10. Which of the following carbonate will not decompose on heating:-

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  11. The decomposition temperature is maximum for:-

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  12. Metallic magnesium is prepared by-

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  13. Alum is the name used for all double salts having the composition M(2)...

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  14. Which valuable byproduct is obtained in the Down's process for extract...

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  15. Which does not exists in solid state

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  16. Alkali metals dissolve in liquid NH(3) then which of the following obs...

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  17. On passing excess of CO(2) in lime water, its milky appearance disappe...

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  18. Which of the carbide will give methane when reacts with water-

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  19. Alkali metals give colour in bunsen flame due to-

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  20. In the preparation of sodium carbonate which of the following is used-

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