Exams › JEE Main › Chemistry

Which of the following salts fails to give any colour in a flame test?

1. KI
2. LiCl
3. CaCl2
4. MgCl2

Correct answer: MgCl2

Solution

MgCl2 does not produce a characteristic color in a flame test because magnesium ions do not emit visible light when heated, unlike the other salts listed which contain elements that do.

Related JEE Main Chemistry questions

• Which statement correctly describes how chemical reactivity changes down the group for alkali metals and halogens?
• Which of the following is a true peroxide?
• When zeolite, a hydrated sodium aluminium silicate, is used with hard water, which ions from the water replace the sodium ions in the zeolite?
• Among the following carbonates, which one is the least thermally stable?
• The solubility of carbonates falls as we move down the magnesium group because there is a reduction in the
• Which statement about sodium peroxide, Na2O2, is incorrect?

⚔️ Practice JEE Main Chemistry free + battle 1v1 →