In which of the following molecules carbon atom marked with asterisk (*) is asymmetric?

Question

(A) (I), (II), (III), (IV) (B) (I), (II), (III) (C) (II), (III), (IV) (D) (I), (III), (IV)

Tardigrade Admin · Accepted Answer

Asymmetric/chiral carbon atom is that in which all of its four valencies are satistied with four different groups or atoms. In compound (iv), carbon has satisfied two of its valencies with two hydrogen atoms i.e., similar atom.
So, it is not an asymmetric carbon atom while rest of the three molecules asymmetric carbon as each carbon has satisfied all four valencies with four different groups or
atoms.
So, the correct option is (b).

Q. In which of the following molecules carbon atom marked with asterisk (∗) is asymmetric?

(I), (II), (III), (IV)

(I), (II), (III)

(II), (III), (IV)

(I), (III), (IV)

Q. In which of the following molecules carbon atom marked with asterisk $(*)$ is asymmetric?