1.

A : Magnesium and Cesium gives blue colour in flame colouration. R : Mgand Cs are of comparable size.

Answer»

If both ASSERTION & Reason are true and the reason is the CORRECT explanantion of the assertion, then mark (1).
If both Assertion & Reason are true and the reason is not the correct explanantion of the assertion, then mark (2).
If Assertion is true STATEMENT but Reason is FALSE. Them mark (3).
If both Assertion and reason are false statement, then mark (4).

Answer :D


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