Science Quiz 6

Science Quiz 6

1)

A body is charged negatively. It implies that

A) it has lost some of its protons
B) it has lost some of its electrons
C) it has acquired some electrons from outside
D) None of these

2)

A devastating Cloud Burst swept over Leh in August 2010. Which one of the following statements with regard to cloud Burst is not correct?

A) There is no satisfactory technique till now for predicting Cloud Burst
B) Cloud Burst is a localised weather phenomenon representing highly concentrated rainfall over a small area in a short duration of time
C) Cloud Burst occurs due to upward movement of moistureladen air with sufficient rapidity to form cumulonimbus clouds
D) Cloud Burst occurs only in hilly areas

3)

In the case of nuclear disaster, which of the following options for cooling the nuclear reactors may be adopted?
1. Pumping of water to the reactors.
2. Use of boric acid.
3. Taking out the fuel rods and keeping them in a cooling pond.
Select the correct answer using the code given below:

A) 1 and 2 only
B) 1, 2 and 3
C) 1 and 3 only
D) 3 only

4)

A close bottle containing water at room temperature is taken to the Moon and than the lid is opened. The water will

A) boil
B) freeze
C) decompose into oxygen and hydrogen
D) not change at all

5)

In scuba-diving, while ascending towards the water surface, there is a danger of bursting the lungs. It is because of

A) Boyle's law
B) Archimedes' principle
C) Gay-Lussac's law of combining volumes
D) Gram's law of diffusion

6)

Most of the communication satellites today are placed in a geostationary orbit. In order to stay over the same spot on the Earth, a geostationary satellite has to be directly above the

A) Equator
B) Tropic of Cancer
C) either North or South Pole
D) Tropic of Capricorn

7)

Viewfinders, used in automobiles to locate the position of the vehicles behind, are made of

A) plane mirror
B) convex mirror
C) concave mirror
D) parabolic mirror

8)

Which one among the following would expand the most on being heated?

A) Alcohol
B) Water
C) Air
D) Glass

9)

If a ship moves from freshwater into seawater, it will

A) sink completely
B) remain unaffected
C) rise a little higher
D) sink a little bit

10)

Mr.X was advised by an architect to make outer walls of his house with hollow bricks. The correct reason is that such walls

A) make the building stronger
B) prevent seepage of moisture from outside
C) help keeping inside cooler in summer and warmer in winter
D) protect the building from lightning