JEE Main 2014 · 9 Apr · Shift 1 · Chemistry Q48

ChemistrySingle correct+4 / -1Question 48 of 90

The number and type of bonds in $\ce{C2^2-}$ ion in $\ce{CaC2}$ are :

One

\sigma

bond and one

\pi

- bond

One

\sigma

bond and two

\pi

- bonds

Two

\sigma

bonds and two

\pi

- bonds

Two

\sigma

bonds and one

\pi

- bond

Answer and worked solution

Official answer: B

$\ce{C2^2-}$ is $\ce{[C#C]^2-}$ , isoelectronic with $\ce{N2}$ : one σ and two π bonds.

JEE Main 2014 · 9 Apr · Shift 1, Chemistry question 48