As far as i know, "quand" and "lorsque" have similiar meaning, "when". So what is the difference and when to use them?
According to the Larousse dictionary, "quand" and "lorsque" are synonyms.
Still according to the Larousse dictionary, the two words indicate the coincidence in time, a simultaneity.
In addition, the word "quand" corresponds to the English word "when" for a question while the word "lorsque" can't be used to translate the interrogative word "when".