Quel means « which » in French and is spelled four different ways:
a) quel------masculine singular
b) quelle----feminine singular
c) quels-----masculine plural
d) quelles---feminine plural
You choose the appropriate form that goes with the gender and number of the noun you are describing.
Céline: Excusez-moi, Madame. Je voudrais acheter une montre.
La Vendeuse: D’accord. Quelle montre voulez-vous?
Céline : Je voudrais cette montre bleue.
Montre is feminine and singular, so quelle would be used.
Lequel means “which one” in French and is spelled four different ways:
a) lequel------masculine singular
b) laquelle----feminine singular
c) lesquels-----masculine plural
d) lesquelles---feminine plural
Note: Notice how both the ending and the beginning of the word changes depending on the gender and number of the noun.
There are several ways to use lequel :
1) All forms of lequel replace all forms of quel + noun.
Quelle montre voulez-vous? …… Laquelle veux-tu? Which watch do you want?....Which one do you want?
2) All forms of lequel can also replace a noun being described.
Je veux le cahier là-bas…. Lequel ? I want the notebook over there. …. Which one?
Je pense à mon frère. Auquel penses-tu ? [À quel frère...] I'm thinking about my brother. > Which one are you thinking about?
2) Lequel replaces an inanimate object of a preposition. (If the object of the