Question

Which of the following carbide is not possible with lanthanides(ln) LnC
Ln3C
Ln2C3
LnC2

Answer 1

Answer:

LnC is not possible.

Answer 2

LnC is not possible.

• Lanthanide reacts with solid carbon to form carbide.
• In this reaction, lanthanide reacts with a solid carbon atom at a very high temperature like 2500° Celcius to form three types of carbide as follows $Ln_3C, Ln_2C_3, LnC_2$.
• This is the only reaction of lanthanide carbide preparation where the carbide LnC is not produced so, LnC is not possible.
• Thus, the correct option is LnC.

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