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Be forms [BeF(4)]^(2-), but Al forms [Ai...

Be forms `[BeF_(4)]^(2-)`, but `Al` forms `[AiF_(6)]^(3-)`.
Reason (R ): Be does not have `d`-orbitals in the valence shell but `Al` has.

A

If both `(A)` and `(R )` are correct and `(R )` is the correct explanation of `(A)`.

B

If both `(A)` and `(R )` are correct, but `(R )` is not the correct explanation of `(A)`.

C

If `(A)` is correct, but `(R )` is incorrect.

D

If `(A)` is incrrect, but `(R )` is correct.

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The correct Answer is:
A
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CENGAGE CHEMISTRY-S-BLOCK GROUP 2 - ALKALINE EARTH METALS-Exercises Assertion Reasoning
  1. Assertion (A): Magnesium does not impart any characteristic colour to ...

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  2. Assertion (A): Alkaline earth metals are harder than alkali meatals. ...

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  3. Assertion (A): Beryllium compounds are covalent in nature. Reason (R...

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  4. BeSO(4) is soluble in water but BaSO(4) is insoluble. Reason (R ): ...

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  5. Assertion (A): magnesium keeps on burning in CO(2). Reason (R ): Mag...

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  6. Be forms [BeF(4)]^(2-), but Al forms [AiF(6)]^(3-). Reason (R ): Be...

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  7. Assertion (A): Magnesium can be obtained by the electronlysis of aqueo...

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  8. Assertion (A): Be and Mg impart characterstic colour to the flame. R...

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  9. Assertion (A): magnesium is not present in enamel of human teeth. Re...

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  10. Assertion (A): Barium is not required for notmal biological function i...

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  11. Assertion (A): Addtion of nH(4)OH to an aqueous solution of BaCl(2) in...

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

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  13. Assertion (A): Sulphur is estimates as BaSO(4) and not as MgSO(4). R...

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  14. Assertion (A): Na(2)SO(4) is soluble in water while BaSO(4) is insolub...

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  15. Assertion (A): Calcium and magnesium oxides are not reduced by carbon....

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  16. Assertion (A): Be(OH)(2) is soluble in NaOH. Reason (R ): Be(OH)(2)...

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  17. Assertion (A): In curing cement plasters, water is sprinkled form time...

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