HCHO Practice Exercise 1
We have just arrived at a bonding description for the formalde-
hyde molecule. Which of the following statements about the
molecule is or are true?

(i) Two of the electrons in the molecule are used to make the
Pie bond in the molecule.
(ii) Six of the electrons in the molecule are used to make the o
bonds in the molecule.

(iii) The C-O bond length in formaldehyde should be shorter
than that in methanol, H3COH.
(a) Only one of the statements is true.
(b) Statements (i) and (ii) are true.
(c) Statements (i) and (iii) are true.
(d) Statements (ii) and (iii) are true.
(e) All three statements are true