Bond line formula of HOCH(CN)₂ is :

Solution

Chemistry ma’am · 3 steps

In a bond-line formula, carbons become corners and their hydrogens vanish. Find the option with no CH.

1. Bond-line rules. Each corner or line end is a carbon atom, and hydrogens on carbon are not drawn. Heteroatoms such as O and N are written out, along with any H on them, so OH stays OH.
2. Read the molecule. In HOCH(CN)₂ the central carbon carries one H, one OH and two CN groups. In bond-line form, this carbon is just the point where three lines meet. Its H is left out.

   Option	Central carbon	Type of formula
   (a)	C and its H drawn with bonds	structural formula
   (b)	written as CH	condensed formula
   (c)	written as CH, with C≡N shown	condensed formula
   (d)	a bare junction of three lines	bond-line formula

3. So. Only (d) shows the central carbon as a vertex with its H left out. The OH and the two CN groups hang off that vertex, so the answer is (d).

The idea to keep. Bond-line means no C and no H-on-C written anywhere. If you can still read the letters CH at a carbon, it is a condensed or structural formula, not bond-line.

Answer from the NTA final answer key. Solution by PrepWiser.