Everyday Science — All MCQs
2717 questions available
Q701.A body can escape the gravitational pull of the earth if it is thrown up with a velocity of?
Correct Answer: C
Earth's escape velocity is approximately 7 miles per second (about 11.2 km/s).
Q702.A body of land that is surrounded by water on three sides is called____?
Correct Answer: C
A landmass surrounded by water on three sides, connected to the mainland on one side, is called a peninsula.
Q703.A boy sitting in an open car moving with the constant speed throws a ball straight up into the air. The ball falls ____?
Correct Answer: A
Due to inertia, the ball retains the car's forward motion, so it lands back in the same relative position (not behind him) as the car continues moving — but per momentum principles it actually falls back to the same spot the boy is in, appearing to fall behind him only if the car accelerates.
Q704.A branch of medicine dealing with eyes and related diseases is called____?
Correct Answer: A
Ophthalmology is the branch of medicine dealing with the eyes and related diseases.
Q705.A Cheetah can accelerate to 100 kmph in
Correct Answer: A
A cheetah can accelerate from 0 to 100 km/h in about 3 seconds, among the fastest accelerations of any land animal.
Q706.A clouding that develops in the lens of the eye or in its envelope obstructing the passage of light is known as____?
Correct Answer: C
A cataract is a clouding of the eye's lens that obstructs light, leading to blurred vision.
Q707.A colloidal system in which a liquid is dispersed into a liquid is called____?
Correct Answer: C
An emulsion is a colloidal system in which one liquid is dispersed as tiny droplets within another liquid.
Q708.A colour blind person cannot distinguish between ____?
Correct Answer: B
Colour blindness most commonly affects the ability to distinguish between red and green due to defects in cone cells.
Q709.A common skin condition that causes skin redness and irritation is known as____?
Correct Answer: A
Psoriasis is a common chronic skin condition causing red, irritated, scaly patches.
Q710.A definite area or a space where some thermodynamic process takes place is known as?
Correct Answer: A
A defined region of space where a thermodynamic process occurs is called a thermodynamic system.
Q711.A device that converts mechanical energy into electric energy is called____?
Correct Answer: D
A generator is a device that converts mechanical energy into electrical energy through electromagnetic induction.
Q712.A fresh egg when placed in salt water will ____ ?
Correct Answer: C
A fresh egg floats in salt water because the increased density of salt water provides more buoyant force than the egg's density.
Q713.A glass chimney stops an oil lamp from smoking because:
Correct Answer: C
A glass chimney improves air draft and shields the flame from drafts, both of which help produce a cleaner, less smoky flame.
Q714.A healthy man consumes maximum calories while playing?
Correct Answer: D
Football (soccer), with its continuous running, burns among the highest calories of common sports for a healthy adult.
Q715.A Little inhalation is done through____?
Correct Answer: B
Light or minimal tobacco inhalation typically occurs through smoking pipes and cigars, as smoke isn't usually drawn deep into the lungs.
Q716.A loudspeaker changes ____ energy into sound energy.
Correct Answer: B
A loudspeaker converts electrical energy into sound energy using a vibrating diaphragm driven by an electromagnet.
Q717.A man is standing on a weighing machine in a lift which is moving. The weighing machine will slow MINIMUM reading when, the lift is moving?
Correct Answer: C
A weighing machine in a lift shows minimum (zero) reading during free fall, when the lift's supporting cable fails and both the person and scale fall at the same acceleration.
Q718.A man presses more weight on earth at____?
Correct Answer: B
A person exerts more pressure/weight on the ground while standing, as their full weight rests on a smaller area (feet) compared to lying down.
Q719.A mixture of sand and naphthalene can be separated by ____ ?
Correct Answer: C
A mixture of sand and naphthalene can be separated by sublimation, since naphthalene sublimes (turns to vapour) on heating while sand does not.
Q720.A moderator is used in nuclear reactor in order to ?
Correct Answer: B
A moderator in a nuclear reactor slows down fast neutrons so they can more effectively sustain the fission chain reaction.