Question

Which of the following compounds does NOT contain molecules?

a. H2
b. NaCl
c. CO2
d. H2O

Answer 1

B, molecules are ionic bonding this is covalent 

Answer 2

NaCl does not contain molecules

Step-by-step explanation:

Molecules are made of multiple atoms bonded together to form a single entity.

In
`H_(2)` (H-H), two hydrogen atoms are bonded together through a covalent bond. Hence it is a molecule.

In
`CO_(2)` (O=C=O), one carbon atom and two oxygen atoms are bonded together through double bond. Hence it is molecule

In
`H_(2)O` (H-O-H), one oxygen atoms and two hydrogen atoms are bonded together through single bond. Hence it is a molecule.

In NaCl,
`Na^(+) and Cl^(-)` ions are held together through ionic attraction forces. Here no actual bond exists between
`Na^(+) and Cl^(-)`. Both
`Na^(+) and Cl^(-)` remain present as individual ions.

Hence NaCl does not contain molecules