GENERAL SCIENCE MCQS SET 23

GENERAL SCIENCE MCQS SET 23

1. Name the particles which make up matter?
A. Non metals
B. Metals
C. Metalloids
D. Atoms
Ans. D
 

2. Particles of matter have following characteristics:
A. They constantly move
B. They attract each other
C. They are very small
D. All of the above
Ans. D
 

3. Which of the following is the property of Solid?
A. Can be compressed
B. Have definite shape
C. Have low density
D. Intermolecular force is less
Ans. B
 

4. For dryness why crystallisation is a better technique than evaporation?
A. Decomposition of solid takes place.
B. Impurities get removed.
C. Solid gets charged.
D. All of the above
Ans. B
 

5. By which apparatus a mixture of an immiscible liquid is separated?
A. Burner
B. Beaker
C. Distillation Flask
D. Separating Funnel
Ans. D
 

6. The process in which heat is required to convert a liquid into the vapour state is known as:
A. Evaporation
B. Latent heat of Vaporisation
C. Melting
D. Condensation
Ans. B
 

7. Which of the following is a property of diffusion?
A. Slowest in liquids
B. Fastest in gases
C. Based on motion of particles
D. All of the above
Ans. D
 

8. By which technique salt is obtained from sea-water?
A. Filtration
B. Distillation
C. Evaporation
D. Chromatography
Ans. C
 

9. Name a technique which is used for separating two or more dissolved solids which are present in a solution in very small quantities?
A. Distillation
B. Centrifugation
C. Crystallisation
D. Chromatography
Ans. D
 

10.  Diffusion in liquids is an example of:
A. Smell of perfume
B. Smell of food
C. Spreading of ink in water
D. Fragrance of incense stick
Ans. C