Separation of substances Worksheet-5

Separation of substances Worksheet-5

 

Fill in the blanks:

  1. ________method is used when the mixture contains solids of different colours, shapes or sizes.
  2. The process of conversion of vapours of a substance into its liquid state is called _______.
  3. Sugar from sugar solution can be separated by _________.
  4. ________ solution of sugar is used to prepare jalebi.

 

Multiple-Choice Question:

  1. Stone pieces are separated from wheat by:

(A) hand-picking                              (B) evaporation

(C) filtration                                     (D) winnowing

 

  1. Salt in water is a:

(A) solid-solid mixture                    (B) liquid-liquid mixture

(C) solid-liquid mixture                   (D) solid-gas mixture

 

  1. Which of the following method is used to separate cream from milk?

(A) centrifugation                            (B) filtration

(C) decantation                                (D) None of these

 

  1. Which of the following methods is used to separate sugar from its solution in water?

(A) Filtration       (B) Evaporation   (C) Sublimation   (D) Decantation

 

  1. Solutions are:

(A) Heterogeneous mixtures (B) Homogeneous mixtures

(C) Compounds                                (D) Elements

 

  1. Identify the mixture from the following.

(A) Oxygen                                       (B) Carbon dioxide

(C) Hydrogen                                   (D) Air

 

  1. Which one of the following is NOT a mixture?

(A)  paint             (B) sugar              (C) air                   (D) crude oil

 

  1. Orange juice is a:

(A) Homogenous mixture               (B) Heterogenous mixture

(C) Pure substance                          (D) Can’t say

 

Answer key:

  1. Handpicking/Hand picking
  2. Condensation
  3. Evaporation
  4. Saturated
  5. (A)
  6. (C)
  7. (A)
  8. (B)
  9. (B)
  10. (D)
  11. (B)
  12. (A)