Exams › JEE Main › Chemistry

A gold ornament contains 75% gold by purity. Its purity expressed in carats is:

1. 18
2. 16
3. 24
4. 20

Correct answer: 18

Solution

Since 24 carat corresponds to 100% gold, 75% gold equals 0.75 * 24 = 18 carat.

Related JEE Main Chemistry questions

• In the sequence used during extraction and purification of a metal, a metal sulphide is first converted to a metal oxide, then to an impure metal, and finally to a pure metal: Metal sulphide —x→ Metal oxide —y→ Impure metal —z→ Pure metal. What are x, y and z respectively?
• In Bayer’s process, which substance is employed as the reagent?
• Thomas slag refers to which of the following substances?
• Which of the following fluxes is employed to eliminate acidic impurities during a metallurgical operation?
• Which material is used to provide a basic lining to a furnace?
• Electromagnetic separation is employed in the beneficiation of which ore?

⚔️ Practice JEE Main Chemistry free + battle 1v1 →