First slide

Alkaline earth metals

Question

MetaI carbides on reaction with H₂O form CH₄.Carbide can be

Moderate

A

${CaC}_{2}$
B

Mg₃C₂
C

Be₂C
D

SiC

Solution

(1) ${CaC}_{2} + H_{2} O ⟶ Ca (OH)_{2} + CH \equiv CH$
(2) ${Mg}_{2} C_{3} + H_{2} O ⟶ Mg (OH)_{2} + {CH}_{3} C \equiv CH$
(3) ${Be}_{2} C + H_{2} O ⟶ Be (OH)_{2} + {CH}_{4}$

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