NEET Physics Chapter Wise Mock Test – General properties of matter
A thick rope of density 1.5 x103kgm-3 and Young’s modulus 5 x 106 Nm-2, 8 m in length when hung from the ceiling of room, the increase in its length due to its own weight is
(a) 9.6 x10-5 m
(b) 19.2 x 10-7 m
(c) 9.6×10-2 m
(d) 9.6 m
A vessel contains oil (density = 0.8 g cm-3) over mercury (density =13.6gcm-3). A homogeneous sphere floats with half of its volume immersed in mercury and the other half in oil. The density of material of the sphere in gcm-3 is
Two wires A and B are of the same material. Their lengths are in the ratio 1 : 2 and the diameter are in the ratio 2 : 1. If they are pulled by the same force, their increase in length will be in the ratio
(b) 1: 4
(c) 1: 8
Two capillary tubes P and Q are dipped in water. The height of water level in capillary P is 2/3 to the height in Q capillary. The ratio of their diameters is
For a given material the Young’s modulus is 2.4 times that of rigidity modulus. Its poission’s ratio is
For adiabatic expansion of a monoatomic perfect gas, the volume increases by 2.4%. What is the percentage decrease in pressure?
The work done in increasing the size of a soap film from 10 cm x 6 cm to 10 cm x 11 cm is 3 xIO-4 J. The surface tension of the film is
(a) 1.5×10-2 Nm-1
(b) 3.0×10-2 Nm-1
(c) 6.0 x 10-2 Nm-1
(d)11.0x 10-2 Nm-1
How much force is required to produce an increase of 0.2% in the length of a brass wire of diameter 0.6 mm? [Young’s modulus for brass = 0.9x 1011 Nm-2]
(a) Nearly 17 N
(b) Nearly 51 N
(c) Nearly 34 N
(d) Nearly 68 N
If two drops of same radius are falling through air with a velocity of 5 cm s-1. If the two drops coalescence to form one drop, the terminal velocity of the drop is
(a) 2.5 cms-1
(b) 10 cms-1
(d) 5 x 41/3 cms-1
The pressure and density of a diatomic gas (γ = 7/5) changes adiabatically from(p, ρ) to(p’,ρ’). If ρ’/ρ = 32, then (p’/p) should be
(d) None of these
One mole of monoatomic gas (γ=5/3) is mixed with one mole of diatomic gas (γ=7/5) What will be the value of y for the mixture?
70 cal of heat is required to increase, the temperature of 2 moles of an ideal gas from 30°C to 35 °C at constant pressure. The amount of heat required to increase the temperature of the same gas through the same temperature range (30°C to 35°C) at constant volume will be [(Gas constant R = 2 cal/(mol-1K-1)].
(a) 30 cal
(b) 50 cal
(c) 70 cal
(d) 90 cal
125 ml of gas A at 0.60 atm and 150 ml of gas B at 0. 80 atm pressure at same temperature is filled in a vessel of 1 L volume. What will be total pressure of mixture at the same temperature?
(a) 0.195 atm
(b) 0.212 atm
(c) 0.120 atm
(d) 0.140 atm
At constant temperature, on increasing the pressure of a gas by 5%, its volume will decrease by
The gas having average speed four times as that of S02 (molecular mass = 64) is
(a) He (molecular mass 4)
(b) O2 (molecular mass 32)
(c) H2 (molecular mass 2)
(d) CH4 (molecular mass 16)
The temperature of a given mass is increased from 27°C to 327°C. The rms velocity of the molecules increases by
(a) √2 times
(b) 2 times
(c) 2√2 times
(d) 4 times
The quantity of heat required to heat 1 mole of a monoatomic gas through 1 K at constant pressure is
(a) 3.5 R
(b) 2.5 R
(c) 1.5 R
(d) None of these
The radiant energy from the sun, incident normally at the surface of the earth is 20 kcal m-2 min. What would have been the radiant energy, incident normally on the earth, if the sun had a temperature, twice of the present one?
(a) 160 kcal m-2 min-1
(b) 40 kcal m-2 min-1
(c) 320 kcal m-2 min-1
(d) 80 kcal m-2 min-1
A solid ball of density half that of water falls freely under gravity from a height of 19.6 m and then enters water. Neglecting air resistance and viscosity effect in water, the depth upto which the ball will go is (g = 9.8 m/s2)
(a) 19.6 m
(b) 28.4 m
(d) 14.7 m
Newton’s law of cooling is the special case of Stefan’s law, when
(a) temperature of body is high
(b) temperature of surroundings is high
(c) temperature difference of body and surroundings is small
(d) temperature difference of body and surroundings is high
It takes 10 min to cool a liquid from 61°C to 59°C. If room temperature is 30°C, then time taken in cooling from51°C to49°C is
(a) 10 min
(b) 11 min
(c) 13 min
(d) 15 min
Direction (Q. Nos. 27-31): In each of the following questions a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements mark the correct answer as
(a) If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion
(b) If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion
(c) If Assertion is true but Reason is false
(d) If both Assertion and Reason are false
Assertion (A): If length of a rod is doubled the breaking load remains unchanged.
Reason (R): Breaking load is equal to the elastic limit.
Assertion (A): The number of degrees of freedom of triatomic molecules, is 6.
Reason (R): Triatomic molecules have three translational degrees of freedom and three rotational degrees of freedom.
Assertion (A): If the same load is attached to lead and rubber wires of the same cross-sectional area, the strain of lead is very much less than that of rubber.
Reason (R): Lead is more elastic than rubber.
Assertion (A): The coefficient of real expansion of liquid is independent of the nature of container.
Reason (R): γa = γr + γv
where, γa = coefficient of apparent expansion
γr = coefficient ofL real expansion and
γv = coefficient of expansion of vessel.
Assertion (A): Thermodynamic processes in nature are irreversible.
Reason (R): Dissipative effects cannot be eliminated.
A body when fully immersed in a liquid of specific gravity 1.2 weight 44 gwt. The same body when fully immersed in water weight 50 gwt. The mass of the body is
(a) 36 g
(b) 48 g
(c) 64 g
(d) 80 g
How much should the pressure of the gas be increased to decrease the volume by 10% at a constant temperature?
(d) 5.11 %
4 m3 of water is to be pumped to a height of 20 m and forced into a reservoir at a pressure of 2 x105 N/m2. The work done by the motor is (External pressure = 105 N/m2)
(a) 8 x 105 J
(b) 16 x 105 J
(c) 12 x 105 J
(d) 32 x 105 J
One end of a conducting rod is maintained at temperature 50°C and at the other end ice is melting at 0°C. The rate of melting of ice is doubled, if
(a) the temperature is made 200°C and the area of cross-section of the rod is doubled
(b) the temperature is made 100°C and length of the rod is made four times
(c) area of cross-section of rod is halved and length is doubled
(d) the temperature is made 100°C and area of cross-section of rod and length both are doubled
A small steel ball falls through a syrup at a constant speed of 1.0 m/s. If the steel ball is pulled upwards with a force equal to twice its effective weight, how fast will it move upward?
(a) 1.0 m/s
(b) 2.0 m/s
(c) 0.5 m/s
22320 cal of heat is supplied to 100g of ice at 0°C. If the latent heat of fusion of ice is 80 cal g-1 and latent heat of vaporisation of water is 540 cal g-1the final amount of water, thus obtained and its temperature respectively are .
(a) 8g, 100°C
(b) 100g, 100°C
(c) 92g, 100°C
(d) 82g, 100°C
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