Which of the following carbides on treatment with water evolve methane 1. CaC2 2.B4C 3. SiC 4.Al4C3

Dear Student


Given Carbides are:

CaC₂ - Calcium Carbide
B₄C - Boron Carbide
SiC - Silicon Carbide
Al₄C₃  - Aluminium Carbide

Will their reaction with water evolve Methane?

Therefore, 

CaC₂ ​+ 2H₂O ---->  Ca(OH)₂ + C₂H₂
So, Calcium Carbide​ will not evolve Methane

B₄C​ + 6H₂O ---> 2B₂O₃ + 6H₂ + C
Boron Carbide, B₄C will not evolve Methane


SiC + 2H₂O ---> SiO₂ + CH₄
Silicon Carbide​, SiC ​will evolve Methane


Al₄C₃ + 12H₂O ---->  4Al (OH)₃ + 3CH_​4
Aluminium Carbide, ​Al₄C₃ will evolve Methane


Regards