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Which electronic configuration correspon...

Which electronic configuration corresponds to least ionisation energy?

A

`1s^(2) 2s^(2) 2p^(2)`

B

`1s^(2) 2s^(2) 2p^(5)`

C

`1s^(2) 2s^(2) 2p^(6)`

D

`1s^(2) 2s^(2) 2p^(2) 3s^(1)`

Text Solution

Verified by Experts

The correct Answer is:
D
Electronic configuration of alkali metals correspond to least energy.
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DINESH PUBLICATION-S-BLOCK ELEMENTS (ALKALI AND ALKALINE EARTH METALS )-MCQB
  1. The stability of the following alkali metal chlorides follows the orde...

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  2. which has the maximum m.p ?

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  3. Which electronic configuration corresponds to least ionisation energy?

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  4. Which is formed with lithium is heated in air?

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  5. What types of ions are present in anhydrous mixture of KF and HF ?

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  6. Sodium gives blue colour in NH(3) solution. This blue colour is due to

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  7. When washing soda is heated.

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  8. Which sulphate has the highest solubility in water ?

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  9. Ba,Sr,Ca and Mg may be arranged in order of decreasing first ionisatio...

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  10. Which is the correct order of increasing basic strength?

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  11. Electronic configuration calcium atom can be written as

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  12. The most electropositive amongst the alkaline earth metals is:

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  13. Which imparts brick red colour to the flame ?

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  14. All the following substances react with water. The pair that gives the...

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  15. Which of the following metal ions plays an important role in muscle co...

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  16. The correct order of increasing thermal stability of K(2)CO(3),MgCO(3)...

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  17. The strongest base in the following is :

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  18. The hydroxide which is max, soluble in water is ?

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  19. Chemical A is used for water softening to remove temporary hardness. A...

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  20. Calcium carbide on hydrolysis forms :

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