Everyday science mcqs for nts,fpsc,ppsc,interviews and all other competative exams.Important MCQS
Which part of the Camera is analogue to the retina in the human eye?
A. Lens
B. Film
C. Aperture
D. Shutter
When a person enters a dark room from bright light he is not able to see clearly for a little while because the?
A. Eye is unable to adjust itself immediately
B. Retina becomes insensitive momentarily
C. Iris is unable to dilate the pupil immediately
D. Distance between the lens and retina take time to adjust
What is the average adult pulse rate?
A. 140-150
B. 115-125
C. 72-80
D. 60
The beautiful color patterns exhibited by a peacock in its tail feathers are due to ?
A. Selective absorption of light
B. Selective re ection of light
C. Sinterference of light
D. Natural colour pattern of feathers
A lake starts freezing because of the cold atmosphere. It will first freeze
A. At the bottom
B. ln the middle pan
C. At the top surface
D. Uniformly throughout the water body
The sun appears red at sunrise and sunset while it appears white at noon, because
A. Of refraction
B. It is cooler at sunrise and at sunset
C. Of diffraction leading to red end of the spectrum reaching the earth.
D. Of Scattering of light due to dust particles and air molecules.
An astronaut inside a spacecraft is in a state of weightlessness. This implies that?
A. The mass of the astronaut is reduced to zero
B. Gravity inside the spacecraft ceases to act
C. The astronaut is outside the influence of the earth’s gravitational force
D. The astronaut and the spacecraft are both in a free-failing state
An iceberg is floating in sea. How much of its mass will remain above the surface of water?
A. One tenth
B. One fifth
C. One fourth
D. One third
Most of the ozone in the atmosphere is concentrated in the _____________?
A. Mesosphere
B. Troposphere
C. Stratosphere
D. ionosphere
The cow’s milk contains how much amount of water in terms of percentage?
A. 60%
B. 65%
C. 72%
D. 80%