1. Which technique is used to separate the substances from a mixture?
A. Chromatography
B. Racing Forging
C. Assembling
D. None of the above
[/toggle] Ans. A [/toggle]
2. In what way iodine can be separated from a mixture of potassium chloride and iodine?
A. Filtration
B. Sedimentation
C. Distillation
D. Sublimation
[/toggle] Ans. D [/toggle]
3. What is Boron?
A. Non metal
B. metal
C. Compound
D. Metalloid
[/toggle] Ans. D [/toggle]
4. Which of the following statements are correct about metals?
(a) Metals are lustrous.
(b) These are good conductors of heat and electricity.
(c) They can be converted into wire.
(d) They are malleable.
Choose the correct option:
A. Both (a) and (d)
B. Both (a) and (c)
C. Both (c) and (d)
D. All (a). (b), (c) and (d)
[/toggle] Ans. D [/toggle]
5. A mixture of salt and sugar is known as
A. Homogeneous mixture
B. Heterogeneous mixture
C. Mixture of Components
D. None of the above
[/toggle] Ans. B [/toggle]
6. By which process can sea water be purified?
A. Evaporation
B. Fractional Distillation
C. Filtration
D. Distillation
[/toggle] Ans. D [/toggle]
7. Which technology is used to squeeze water from the soaked clothes in the washing machine?
A. Evaporation
B. Decantation
C. Centrifugation
D. Sedimentation
[/toggle] Ans. C [/toggle]
8. Due to which process dry raisins when kept in water swell up?
A. Osmosis
B. Sedimentation
C. Distillation
D. Decantation
[/toggle] Ans. A[/toggle]
9. Which of the following is a mixture?
A. Distilled water
B. Gasoline
C. Both A and B
D. Neither A nor B
[/toggle] Ans. B [/toggle]
10. Boyle’s law relates to which state of matter?
A. Solid state
B. Liquid stage
C. Gaseous state
D. None of the above
[/toggle] Ans. C [/toggle]
