JEE CHEMISTRY MCQ: P-BLOCK ELEMENTS

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Holme’s signals can be obtained by using

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Correct option: B

Ca{C_2} + C{a_3}{P_2}

Option B (

Ca{C_2} + C{a_3}{P_2}

) is correct because Holmes' signals are produced by the reaction of calcium carbide (

Ca{C_2}

) and calcium phosphide (

C{a_3}{P_2}

) with water, generating acetylene and phosphine, which ignite spontaneously.

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