First slide

Alkanes

Question

How many of the following compounds gives methane on hydrolysis ${Al}_{4} C_{3}, {Be}_{2} C, {CaC}_{2}, {Mg}_{2} C_{3}$

Moderate

Solution

${Al}_{4} C_{3} + 12 H_{2} O \to 4 Al {(O H)}_{3} + 3 {CH}_{4}$
${Be}_{2} C + 4 H_{2} O \to 2 Be {(OH)}_{2} + {CH}_{4}$

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