Assertion(A) : Beryllium and magnesium do not impart characteristic colour in flame.
Reasoning(R) : Both Beryllium and magnesium have high I.E.

Both Assertion and Reason are true and Reason is the correct explanation of Assertion

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Both Assertion and Reason are true but Reason is not a correct explanation of Assertion

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Assertion is true but Reason is false

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Both Assertion and Reason are false

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Solution

The correct option is C Both Assertion and Reason are true and Reason is the correct explanation of Assertion
Small sized Be and Mg atoms have high ionization energies. Hence, the energy of flame is not sufficient to excite their electrons. Thus, Be and Mg do not produce colour in flame.

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Assertion(A) : Beryllium and magnesium do not impart characteristic colour in flame.Reasoning(R) : Both Beryllium and magnesium have high I.E.

The correct option is C Both Assertion and Reason are true and Reason is the correct explanation of AssertionSmall sized Be and Mg atoms have high ionization energies. Hence, the energy of flame is not sufficient to excite their electrons. Thus, Be and Mg do not produce colour in flame.

Assertion(A) : Beryllium and magnesium do not impart characteristic colour in flame.
Reasoning(R) : Both Beryllium and magnesium have high I.E.

The correct option is C Both Assertion and Reason are true and Reason is the correct explanation of Assertion
Small sized Be and Mg atoms have high ionization energies. Hence, the energy of flame is not sufficient to excite their electrons. Thus, Be and Mg do not produce colour in flame.