General Science - Important Questions and Answers

1. Free surface of a liquid behaves like a sheet and tends to contract to the smallest possible area due to the–

(A) force of adhesion

(B) force of friction 

(C) centrifugal force

(D) force of cohesion 

2. Which of the following chemicals is useful in photography ?

(A) Aluminium hydroxide

(B) Potassium nitrate

(C) Silver bromide

(D) Sodium chloride

3. The purest form of water can be obtained from– 

(A) a deep tubewell

(B) a running stream

(C) a hot water spring

(D) a heavy shower of rain

4. If speed of rotation of the earth increases, weight of the body– 

(A) increases

(B) remains unchanged

(C) decreases

(D) may decrease or increase

5. The buoyancy depends on___

(A) the shape of the body

(B) the mass of the body

(C) the mass of the liquid displaced

(D) the depth to which the body is immersed

6. An element common to all acids is___

(a) oxygen

(b) hydrogen

(c) sulphur

(d) chlorine

7. Which one of the following is not allied to Geophysical Sciences ?

(A) Hydrology

(B) Meteorology

(C) Palaeontology

(D) Seismology

8. Which of the following statements relating to sound and light is true ?

(A) Light is a form of kinetic energy, whereas sound is a form of potential energy.

(B) Light can be reflected but sound cannot be.

(C) Light travels faster in air than sound does.

(D) Sound travels in waves but light does not.

9. Friction can be reduced by changing over from___

(A) sliding to rolling

(B) rolling to sliding

(C) potential energy to kinetic energy 

(D) dynamic to static

10. Which of the following is a physical change ?

(A) Oxidation

(B) Reduction

(C) Decomposition

(D) Sublimation

11. Which of the following vitamins is stored in the liver ?

(A) Vitamin A

(B) Vitamin C

(C) Vitamin E

(D) Vitamin K

12. Which of the following is needed by a person suffering from diabetes ?

(A) Antibiotics

(B) Insulin

(C) Penicillin

(D) Streptomycin

13. Pressure cooker cooks rice faster because____

(A) it always lets the steam escape

(B) high pressure crushes the hard covering of rice grains

(C) it does not let the heat energy escape easily 

(D) high pressure raises the boiling point of water

14. The isotopes of an element contain the same number of_____

(A) neutrons and protons

(B) protons but different number of neutrons 

(C) neutrons and protons but different number of electrons

(D) neutrons and electrons but different number if protons

15. The theory of inheritance of acquired characters was propounded by______

(A) Charles Darwin

(B) Gregor Mendel

(C) J. B. Lamarck

(D) Weismann

16. Photophobia is_____

(A) a disease caused by too much sunlight

(B) abnormal intolerance of light

(C) the adjustment of the eye for light

(D) the ability to perceive light

17. Which one of the following elements is least likely to be found in commercial fertilizers ?

(A) Nitrogen

(B) Phosphorus

(C) Potassium

(D) Silicon

18. Lime is sometimes applied to soil in order to_____

(A) increase the alkalinity of the soil

(B) increase the acidity of the soil

(C) restore nitrates to the soil

(D) make the soil more porous

19. An element found in all organic compounds is_____

(A) oxygen

(B) calcium

(C) nitrogen

(D) carbon

20. Most commonly used bleaching agent is_____

(A) alcohol

(B) carbon  dioxide

(C) chlorine

(D) sodium chloride

Ans : (C)

21. Which out of the following organs dies not eliminate waste products from the body ?

(A) Large intestine

(B) Liver

(C) Kidney

(D) Skin

22. Superconductivity is a phenomenon in which the resistance of a substance_____

(A) increases with temperature

(B) decreases with temperature

(C) does not change with temperature

(D) becomes zero at very low temperature

23. Liquids transmit pressure equally in all directions. This is known as______

(A) Boyle-Pascal’s Law

(B) Pascal’s Law

(C) Archimedes’ Principal

(D) None of the above

24. The life history of human malarial parasite in Anopheles was first described by_____

(A) Patrick Manson

(B) Laveran

(C) Ronald Ross

(D) Richard Pfeiffer

25. Which of the following is based on the process of fusion ?

(A) Atom bomb

(B) Hydrogen bomb

(C) Ordinary bomb

(D) Napalm bomb

26. Brain of a normal human adult weighs about___

(A) 1 lb

(B) 2 lb

(C) 3 lb

(D) 4 lb

27. Hybridization is____

(A) downward movement of water through soil

(B) a process of tilling the land

(C) decayed vegetable matter

(D) cross-fertilization between two varieties

28. Of the following foods, which one is the best source of protein ?

(A) Butter

(B) Fish

(C) Lettuce

(D) Milk

29. The volume of which of the following materials decreases when it is heated from 0°C to 5°C ? 

(A) Air

(B) Copper

(C) Water

(D) Mercury

30. Which of the following is a non metal that remains liquid at room temperature?

(A) Phosphorous

(B) Bromine

(C) Chlorine

(D) Helium