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Assertion : Density is Mg is more than t...

Assertion : Density is `Mg` is more than that of `Ca`.
Reason : It is due to the presence of `3d-` orbital.

A

Both assertion and reason are true and the reason is the correct explanation of the assertion.

B

Both assertion and reason are true but reason is not the correct explanation of the assertion

C

Assertion is true but reason is false.

D

Assertion is false but reason is true.

Text Solution

Verified by Experts

The correct Answer is:
c
The density of alkaline earth metals decreases from `Be` to `Ca`. Alkaline earth metal have `ns^(2)` configuration.
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A2Z-S BLOCK ELEMENTS ( GROUP 13 - 14)-Section B - Assertion Reasoning
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  8. Assertion (A): Na(2)SO(4) is soluble in water while BaSO(4) is insolub...

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  9. Assertion : Superoxides of alkali metals are paramagnetic. Reason : ...

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  10. Assertion : Solutions of alkali metals in liquid ammonia are good redu...

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  11. Assertion : Solubilities of alkali metal fluorides and carbonates incr...

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  12. Assertion : All alkali metals do not form superoxides as one of the ma...

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  13. Assertion : Na(2)SO(4) can be used as the starting material for the p...

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  14. Assertion : Potassium carbonate can be prepared by Solvay process like...

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  15. Assertion (A): BaCO(3) is more soluble in HNO(3) than in water. Reas...

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  16. Assertion : The crystalline salts of alkaline earth metals contain mor...

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  17. Assertion : Sodium bicarbonate generally precipitates normal carbonate...

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  18. Assertion : The decahydrated form of sodium carbonate on standing in a...

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  19. Assertion : Solution of sodium hydroxide can be stored in a vessel mad...

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  20. Assertion : White precipitate of BaSO(4) is insoluble in water but rea...

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