GENERAL SCIENCE #7
MULTIPLE CHOICE QUESTIONS
1. A
rocket or a jet engine works on the principle of which of the following?
(a) Conservation of mass
(b) Conservation of momentum
(c) Newton’s second law of motion
(d) Conservation of energy
Answer:
(b)
2. What
is the SI unit of power?
(a) Kelvin
(b) Watt
(c) Coulomb
(d) Joule
Answer:
(b)
3. A
body at rest can have which of the following?
(a) Velocity
(b) Momentum
(c) Speed
(d) Energy
Answer:
(d)
4. Which
law of motion is called ‘law of inertia’?
(a) Newton’s first law of motion
(b) Newton’s second law of motion
(c) Newton’s third law of motion
(d) None of the above
Answer:
(a)
5. Newton’s
second law of motion gives the measure of which of the following?
(a) Force
(b) Impulse
(c) Acceleration
(d) Momentum
Answer:
(a)
6. What
is the SI unit of pressure?
(a) N/m2 or Pascal
(b) Ampere
(c) Joule
(d) Kelvin
Answer:
(a)
7. Joule
is the SI unit of which of the following?
(a) Momentum
(b) Work
(c) Force
(d) Power
Answer:
(b)
8. Which
is the lightest element?
(a) Hydrogen
(b) Mercury
(c) Nitrogen
(d) Oxygen
Answer:
(a)
9. Which
metal exists in liquid state at room temperature?
(a) Iodine
(b) Mercury
(c) Chlorine
(d) Bromine
Answer:
(b)
10. An
element is made up of atoms, all having the ……….
(a) very high actual masses
(b) same atomic number
(c) different atomic number
(d) sometimes different sometimes same atomic number
Answer:
(b)
11. How
many elements are present in nature?
(a) 25
(b) 92
(c) 250
(d) 117
Answer:
(b)
12. Which
of the following sentences is correct?
(a) Air is a compound
(b) Liquid air does not have a fixed boiling point
(c) Air is a mixture
(d) Both ‘b’ and ‘c’
Answer:
(d)
13. Which
of the following element has lowest conductance of heat?
(a) Sodium
(b) Mercury
(c) Lead
(d) Zinc
Answer:
(a)
14. Which
of the following is the best conductor of electricity?
(a) Platinum
(b) Silver
(c) Copper
(d) Diamond
Answer:
(b)
15. Which
of the following animals has the heaviest heart?
(a) Cow
(b) Dog
(c) Horse
(d) Sheep
Answer:
(c)
16. Which
of the following human organs is least susceptible to harmful radiations?
(a) Brain
(b) Lungs
(c) Heart
(d) Eyes
Answer:
(a)
17. Kidney
is a part of which of the following?
(a) Skeleton system
(b) Nervous system
(c) Digestive system
(d) Excretory system
Answer:
(d)
18. The
normal blood pressure of human beings is in which of the following ranges?
(a) 110/70 mm
(b) 130/70 mm
(c) 120/80 mm
(d) 100/80 mm
Answer:
(c)
19. Which
of the following does not contain carbohydrates?
(a) Wax
(b) Starch
(c) Cellulose
(d) Wheat flour
Answer:
(a)
20. Which
of the following body organ is not present in pair?
(a) Ovary
(b) Kidney
(c) Testes
(d) Heart
Answer:
(d)
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