Question

1) Which of the following is added to water in order to kill germs?

a) Sugar b) Alum c) Salt d) Chlorine

2) Pick the materials from the following which is completely soluble in water.
a) Chalk powder b) Salt crystals c) Glucose d) Sawdust

3) Which method is used to obtain a pure liquid from a solution?
a) distillation b) condensation c) filtration d) loading



4) A mixture of sawdust and water can be separated by which method?

a) sedimentation b) decantation c) distillation d) filtration



5) Radhika obtained salt from salt solution by evaporation but water cannot be recovered during evaporation, it is lost into the air. In order to recover both salt as well as water from the solution, which method should she use?

a) Distillation b) Decantation c) Filtration d) Loading

Answer 1

Answer:

1) D

2C

3 C

4 A

5 not sure but B