General Science #4 MCQ

GENERAL SCIENCE #4 MCQ

1. Why does a scooter driver over an oily road generally slip?

(a) Friction between tyres and road decreases

(b) Friction between tyres and road increases

(c) Inertia of the scooter tyres increases

(d) Inertia of the scooter tyres decreases

Answer: (a)

2. A man cannot see an object distinctly at a distance less than 1 m. He is suffering from which of the following?

(a) Distortion

(b) Myopia

(c) Astigmatism

(d) Hypermetropia

Answer: (d)

3. Which one of the following optical instruments produce a virtual image?

(a) A simple magnifier

(b) An ordinary single lens reflex camera

(c) Movie projector

(d) None of the above

Answer: (a)

4. How many images can a man see if he stands between two plane mirrors inclined at an angle of 60°?

(a) 4

(b) 5

(c) 6

(d) 7

Answer: (b)

5. Which of the following is a scalar quantity?

(a) Electric field

(b) Moment of a force

(c) Acceleration

(d) Power

Answer: (d)

6. Panchromatic photographic film is sensitive to which of the following?

(a) Light of violet colour

(b) Light of red colour

(c) Light of yellow colour

(d) The entire region of the visible spectrum

Answer: (d)

7. Air is blown over a hot body to cool it. This would increase the rate of heat loss by which of the following?

(a) Radiation and convection

(b) Conduction and convection

(c) Convection

(d) Conduction

Answer: (c)

8. Cheese is an example of which of the following?

(a) Foam

(b) Sol

(c) Gel

(d) Emulsion

Answer: (c)

9. Common salt is obtained from the oceans by which of the following methods?

(a) Filtration

(b) Evaporation

(c) Crystallisation

(d) Sublimation

Answer: (b)

10. Scattering of light takes place in which of the following?

(a) Electroplating

(b) Electrolytic solution

(c) Colloidal solutions

(d) Electrodialysis

Answer: (c)

11. Salt sodium is a mixture of which of the following?

(a) Sodium chloride in water

(b) Common salt and bromine

(c) Bromine in water

(d) None of the above

Answer: (a)

12. Kinetic energy of molecules is highest in which of the following?

(a) Liquid

(b) Solid

(c) Gas

(d) None of the above

Answer: (c)

13. Ice-cream is an example of which of the following?

(a) Suspension

(b) Emulsion

(c) True solution

(d) Colloid

Answer: (b)

14. What is called the method of separating complex mixtures based on their rates of absorption?

(a) Occlusion

(b) Distillation

(c) Sedimentation

(d) Chromatography

Answer: (d)

15. What is the number of floating ribs in the human body?

(a) 5 pairs

(b) 3 pairs

(c) 6 pairs

(d) 2 pairs

Answer: (d)

16. The colour of the human skin is due to which of the following?

(a) Myelin

(b) Melanin

(c) Myoglobin

(d) Keratin

Answer: (b)

17. What is the outermost layer of the skin called?

(a) Epidermis

(b) Fibre

(c) Mucus

(d) None of the above

Answer: (a)

18. Which of the following is the hardest part in human body?

(a) Chitin

(b) Keratin

(c) Dentine

(d) Enamel

Answer: (d)

19. Which of the following is not the part of nervous system?

(a) Nerves

(b) Brain

(c) Blood

(d) Spinal cord

Answer: (c)

20. Which is the protein, present in human blood?

(a) Haemoglobin

(b) Myosin

(c) Insulin

(d) Trypsin

Answer: (a)