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Assertion (A): Magnesium does not impart...

Assertion (A): Magnesium does not impart any characteristic colour to the flame.
Reason (R ): Due to small size and high effective nuclear charge, magnesium requires a large amount of energy for excitation of electrons.

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.

Text Solution

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The correct Answer is:
A
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Knowledge Check

  • Assertion : Berylium does not impart any characteristic colour to the Bunsen flame. Reason : Due to its very high ionization energy, beryllium requires a large amount of energy for excitation of the electrons.

    A
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    B
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  • Assertion : Be and Mg do not impart characteristic colour to the flame. Reason : Both Be and Mg have high ionisation energy.

    A
    Both assertion and reason are true and reason is the correct explanation of assertion
    B
    Both assertion and reason are true but reason is not the correct explanation of assertion
    C
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    D
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  • Assertion: Magnesium does not impact characteristic colour to the bunsen-burner flame. Reason: Ionisation energy of Mg is very high.

    A
    If both assertion and reason are true and the reason is the correct explanation of assertion
    B
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    D
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