Science GK Quiz Questions for Practice
The amount of buoyancy obtained by a solid partially or fully immersed in a liquid depends on?
(A) on the amount of liquid displaced by the solid
(B) on the weight of the solid
(C) on the mass of the solid
(D) none of these
Correct Answer : A
Explanation :
Archimedes' principle states that : "The upward buoyant force that is exerted on a body immersed in a fluid, whether fully or partially submerged, is equal to the volume of the fluid that the body displaces."
The reason why a needle floats on top of the water is?
(A) Surface tension
(B) Adhesion
(C) Cohesion
(D) Capillarity
Correct Answer : A
Explanation :
It is due to the surface tension of the liquid.
What is the reason for the spherical shape of a liquid drop?
(A) Viscosity
(B) Light Load
(C) Surface Tension
(D) Atmospheric Pressure
Correct Answer : C
Explanation :
Due to surface tension, surface tries to minimize its area. As sphere has the minimum surface area among all geometrical shapes thus, liquid drop becomes spherical.
The working principle of the washing machine is?
(A) Sub-Centre
(B) Diffusion
(C) Centrifugation
(D) Dialysis
Correct Answer : C
Explanation :
The working principle of a washing machine is centrifugation. Centrifugation is a separation process that uses the action of centrifugal force to promote accelerated settling of particles in a solid-liquid mixture.
An iron needle sinks in water but a ship floats, on what principle is this based?
(A) Pascal's principle
(B) Principle of Archimedes
(C) Law of Gravitation
(D) None of these
Correct Answer : B
Explanation :
Hence, according to Archimedes' principle, the upthrust is more than the weight of the ship. That is why the iron ship floats in water.
What is the end product of glycolysis?
(A) Ethyl Alcohol
(B) Carbon Dioxide
(C) Pyruvic Acid
(D) Glucose
Correct Answer : C
Lysosomes are known as suicide bags because of their _.
(A) Protolytic Enzyme
(B) parasitic Nucleus
(C) Hydrolytic Enzyme
(D) Phagocytic Cctivity
Correct Answer : C
Due to the presence of which of the following, animal cells and plant cells differ?
(A) Ribosome
(B) Cell Wall
(C) Chloroplast
(D) Protoplasm
Correct Answer : B
Bricks in a building are like _ in living beings.
(A) Cells
(B) Tissues
(C) Organs
(D) Glands
Correct Answer : A
Which of the following is not present in adult stomata?
(A) Cytoplasm
(B) Chloroplast
(C) Cell Wall
(D) Vacuole
Correct Answer : A
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Rajesh Bhatia
A Writer, Teacher and GK Expert. I am an M.A. & M.Ed. in English Literature and Political Science. I am highly keen and passionate about reading Indian History. Also, I like to mentor students about how to prepare for a competitive examination. Share your concerns with me by comment box. Also, you can ask anything at linkedin.com/in/rajesh-bhatia-7395a015b/.
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