Practice Physics concept - general science mcq Online Quiz (set-1) For All Competitive Exams
Q-1) The substance which exhibits practically no elastic effect is
(a)
(b)
(c)
(d)
Q-2) Which one among the following is the correct value of the gravitational force of the Earth acting on a body of mass 1 kg?
(a)
(b)
(c)
(d)
Q-3) A body weighs 5 kg on equator. At the poles it is likely to weight
(a)
(b)
(c)
(d)
Q-4) The weight of a body is 9.8 N at the place where g = 9.8 ms–2. Its mass is
(a)
(b)
(c)
(d)
Q-5) The mass of a body on earth is 100 kg (acceleration due to gravity, $g_e = 10 m/{s}^2$. If acceleration due to gravity on the moon is $g_e$/ 6, then the mass of the body on the moon is :
(a)
(b)
(c)
(d)
Q-6) Consider the following statements:
- The gravitational force exerted by the sun on the moon is greater than the gravitational force exerted by the earth on the moon.
- A heavy body falls at a faster rate than a light body in vacuum.
Which of the following statements given above is/are correct ?
(a)
(b)
(c)
(d)
Q-7) Consider the following statements : If there were no phenomenon of capillarity
- it would be difficult to use a kerosene lamp
- one would not be able to use a straw to consume a soft drink
- the blotting paper would fail to function
- the big trees that we see around would not have grown on the Earth
Which of the statements given above are correct?
(a)
(b)
(c)
(d)
Q-8) A block of ice is floating in a beaker containing liquid of specific gravity greater than one. When ice melts completely what happens to the level of liquid in the beaker?
(a)
(b)
(c)
(d)
Q-9) A liquid rises to a certain length in a capillary tube. The tube is inclined to an angle of The length of the liquid column will
(a)
(b)
(c)
(d)
Q-10) If the radius of the earth were to shrink by one percent, its mass remaining the same, the value of g on the earth’s surface would:
(a)
(b)
(c)
(d)
Q-11) Assertion (A)
Gravitational attraction is a central force and therefore in motion of planets in the solar system, the angular momentum is conserved.
Reason (R)
In the motion of planets of the solar system, equal areas are swept in equal time.
(a)
(b)
(c)
(d)
Q-12) Assertion (A):
An iron ball floats on mercury but gets immersed in water.
Reason (R) :
The specific gravity of iron is more than that of mercury.
(a)
(b)
(c)
(d)
Q-13) Assertion (A) :
A beaker filled with water at 4°C overflows if the temperature is decreased or increased.
Reason (R) :
Density of water is maximum at 4°C.
(a)
(b)
(c)
(d)
Q-14) Assertion (A) :
The weight of a body decreases with the increase of altitude on earth.
Reason (R) :
The earth is not a perfect sphere.
(a)
(b)
(c)
(d)
Q-15) Assertion (A) :
With the increase of temperature, the viscosity of glycerine increases.
Reason (R) :
Rise of temperature increases kinetic energy of molecules.
(a)
(b)
(c)
(d)
Q-16) Raw mangoes shrivel when pickled in brine. The phenomenon is associated with
(a)
(b)
(c)
(d)
Q-17) For which one of the following is capillarity not the reason?
(a)
(b)
(c)
(d)
Q-18) In scuba-diving, while ascending towards the water surface, there is a danger of bursting the lungs. It is because of
(a)
(b)
(c)
(d)
Q-19) The specific gravity of a substance is measured by a hydrometer at the sea level. If the measurement is done at the top of a mountain, what would be the specific gravity ?
(a)
(b)
(c)
(d)
Q-20) Dirty cloths containing grease and oil stains are cleaned by adding detergents to water. Stains are removed because detergent
(a)
(b)
(c)
(d)