Select the methanides from compounds given below- IAl4C3 IIBe2C IIIMgC2 IVBaC2

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Question

Select the methanides from compounds given below:
$A l_{4} C_{3} I B e_{2} C I I M g C_{2} I I I B a C_{2} I V$

I only

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I and IV

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I and II

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I, II, III and IV

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Solution

The correct option is C I and II
$A l_{4} C_{3}$ and $B e_{2} C$ are methanides. On hydrolysis, they liberate methane.

$A l_{4} C_{3} + 12 H_{2} O \to 4 A l (O H)_{3} + 3 C H_{4}$

$B e_{2} C + 4 H_{2} O \to 2 B e (O H)_{2} + C H_{4}$

$M g C_{2}$ and $B a C_{2}$ on hydrolysis liberates acetylene.

$M g C_{2} + 2 H_{2} O \to M g (O H)_{2} + H C \equiv C H$

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

Option C is correct.

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Select the methanides from compounds given below:Al4C3IBe2CIIMgC2IIIBaC2IV

The correct option is C I and IIAl4C3 and Be2C are methanides. On hydrolysis, they liberate methane.Al4C3+12H2O→4Al(OH)3+3CH4Be2C+4H2O→2Be(OH)2+CH4MgC2 and BaC2 on hydrolysis liberates acetylene.MgC2+2H2O→Mg(OH)2+HC≡CHBaC2+2H2O→Ba(OH)2+HC≡CHOption C is correct.

Select the methanides from compounds given below:
$A l_{4} C_{3} I B e_{2} C I I M g C_{2} I I I B a C_{2} I V$