Separation of substances Worksheet-3

Separation of substances Worksheet-3

 

Fill in The Blanks:

  1. The process of deliberately mixing food materials with cheap, unwanted harmful things is called ________.
  2. ___ method is used to separate insoluble solids from liquids.
  3. ________ process is used to separate pebbles and stones from sand at construction sites.
  4. In a solution of turmeric in water,_____ is solute.
  5. The ability of a substance to get dissolved in a given liquid is known as its ______.

 

Multiple-Choice Question:

  1. Filtration is a process used to separate:

(A) solid-solid mixture

(B) liquid-liquid mixture

(C) suspended solid-liquid mixture

(D) liquid-liquid mixture

 

  1. Which of the following process is used to remove sand from water?

(A) Sedimentation                           (B) Filtration

(C) evaporation                               (D) None of these

 

  1. In which of the following process a mixture is rotated at high speed?

(A) Evaporation                               (B) Filtration

(C) Distillation                                  (D) Centrifugation

 

  1. The constituents of a mixture are present in:

(A) Fixed ratio                                  (B) Can’t say

(C) Variable ratio                             (D) none of these

 

  1. A compound consists of:

(A) Only one kind of atom

(B) Only one kind of element

(C) A mixture of elements and molecules

(D) Only one kind of molecules

 

  1. In the distillation apparatus shown what are the parts labelled A and B?

distillation1c.gif

(A) A=funnel, B=thermometer

(B) A=thermometer, B=Funnel

(C) A=Liebig condenser, B=thermometer

(D)  A=Liebig condenser, B=Flask

 

  1. Mixtures of sand and water or sand and iron filings are:

(A) Heterogenous mixtures            (B) Homogenous mixtures

(C) Can’t say

 

Answer key:

  1. food adulteration/Adulteration
  2. Evaporation
  3. Sieving
  4. Turmeric
  5. Solubility
  6. (C)
  7. (A)
  8. (D)
  9. (C)
  10. (C)
  11. (C)
  12. (A)