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Question

Which one is not true about carbides?

A
Al4C3 is methanide and produces methane on hydrolysis
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B
Mg2C3 is propylide and produces propane on hydrolysis
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C
CaC2 and Na2C2 are acetylides and they produce acetylene on hydrolysis
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D
Be2C gives methane on hydrolysis
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Solution

The correct option is B Mg2C3 is propylide and produces propane on hydrolysis
Mg2C3 is propylide and produces propyne on hydrolysis.
(a)
Al4C3+12H2O4Al(OH)3+3CH4
(b)
Mg2C3+H2OMg(OH)2+C3H4
(c)
CaC2+2H2OCa(OH)2+C2H2
Na2C2+2H2O2Na(OH)+C2H2
(d)
Be2C+H2OBe(OH)2+CH4

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