Science Quiz 5

Science Quiz 5

1)

Which type of reaction produces the most harmful radiation?

A) Fusion reaction
B) Chemical reaction
C) Fission reaction
D) Photo-Chemical reaction

2)

The velocity of sound is maximum in -

A) Vacuum
B) Metal
C) Liquid
D) Air

3)

When you pull out the plug connected to an electrical appliance, you often observe a spark. To which property of the appliance, is this related?

A) Capacitance
B) Resistance
C) Inductance
D) Wattage

4)

The focal length of a convex lens is

A) shorter for blue light than for red
B) the same for all colours
C) shorter for red light than for blue
D) maximum for yellow light

5)

When a ball drops on to the floor it bounces. Why does it bounce?

A) The floor heats up on impact
B) Newton's third law implies that for every action there is a reaction
C) File floor exerts a force on the ball during the impact
D) The floor is perfectly rigid

6)

A body has a mass of 6 kg on the Earth; when measured on the Moon, its mass would be

A) nearly 1 kg
B) 6 kg
C) less than 1 kg
D) less than 6 kg

7)

Which of the following is used for correcting myopic eyes?

A) Convex Lens
B) Concave Lens
C) Cylindrical Lens
D) None of the above

8)

The sky appears blue due to-

A) Scattering of light
B) Reflection of light
C) Refraction of light
D) Diffraction of light

9)

Decibel unit is used to measure-

A) Light intensity
B) Sound intensity
C) Magnitude of Earthquake
D) None of the above

10)

What does an air conditioner installed in a room control?

A) Humidity and temperature only
B) Temperature only
C) Pressure and temperature only
D) Humidity, pressure and temperature