Which of the following give $H_{2}$ gas with $N a$ ?

C H_{4}

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C_{2} H_{6}

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C_{2} H_{4}

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C_{2} H_{2}

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Solution

The correct option is D $C_{2} H_{2}$
Any H attached to an electronegative atom can behave as acidic hydrogen. In given options, only acetylene has acidic hydrogen ion $(H^{+})$ , so it will evolve hydrogen gas with $N a$ .

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Similar questions

Which of the following will give addition reactions and why ?
$C_{4} H_{10}, C_{2} H_{6}, C_{2} H_{4}, C H_{4}, C_{3} H_{8}, C_{3} H_{4}$

C

C H_{4}, C_{2} H_{6}, C_{3} H_{8}, C_{2} H_{4}, C_{2} H_{2}, H_{2} C_{2} O_{4}

C O_{2}

Question 1
Calculate the molecular masses of $H_{2}, O_{2}, C l_{2}, C O_{2}, C H_{4}, C_{2} H_{6}, C_{2} H_{4}, N H_{3}, C H_{3} O H$ .

$B e_{2} C + H_{2} O \to B e O + x$

$C a C_{2} + H_{2} O \to C a (O H)_{2} + y$

$M g_{2} C_{3} + H_{2} O \to M g (O H)_{2} + z$ .

$x, y$ & $z$ are respectively

H_{2}, O_{2}, C l_{2}, C O_{2}, C H_{4}, C_{2} H_{6}, C_{2} H_{4}, N H_{3}, C H_{3} O H

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