Question

Which of the following methods are involved in the separation of salt from a mixture of sand, iron fillings, pebbles and salt water?

• A. Handpicking
• B. Magnetic separation
• C. Filtration
• D. Evaporation

Answer 1

Answer: (A), (B), (C), (D)

The correct options are
A Handpicking
B Magnetic separation
C Filtration
D Evaporation

Pebbles are visibly large particles that can be removed by hand. So, they can be separated from the mixture by handpicking.
Iron gets attracted to magnet. Hence, magnetic separation can be used to separate the iron fillings from the mixture.
Sand can be separated from the remaining mixture by the process of filtration. The filtrate obtained is a salt water solution.
Salt can be separated from salt water solution by the process of evaporation. Water gets evaporated leaving salt behind.