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In case of alkaline earth metals, the ox...

In case of alkaline earth metals, the oxidation state more than two is not observed because 

A

They have only two electrons in the outer most shell

B

The s-orbital can accommodate only two electrons

C

The removal of third electron involves breaking up of noble gas configuration and the energy needed for this purpose is extremely high

D

None of the above

Text Solution

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The correct Answer is:
C
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AAKASH SERIES-ALKALINE EARTH METALS-OBJECTIVE EXERCISE - 1
  1. In alkaline earth metals, the electrons are more firmly held to the nu...

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  2. Which of the following is true for magnesium?

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  3. In case of alkaline earth metals, the oxidation state more than two is...

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  4. One of the following statements is incorrect

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  5. A piece of magnesium ribbon was heated to redness in an atmosphere of ...

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  6. BeF(2) is highly soluble in water whereas the fluorides of other alkal...

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  7. A substance which gives a brick red flame and breaks down on heating t...

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  8. Which of the following statements is false?

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  9. Which of the following statements is false?

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  10. The activity of alkaline earth metals as reducing agents

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  11. Beryllium hydride is obtained by

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  12. Substance which absorbs CO(2) and violently reacts with H(2)O with sou...

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  13. Which pair of the following chlorides do not impart colour to the flam...

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  14. The least ionic chloride is formed by

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  15. Which of the following on thermal decompo sition yields a basic as wel...

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  16. The substance not likely to contain CaCO(3) is

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  17. Which of the following elements does not form hydride by direct heatin...

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  18. Chlorophyll contains

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  19. The calcium concentration in plasma is regulated by which harmones

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  20. Which of the following is correct A) Ca^(+2) ions are necessary to b...

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