NEET Physics Chapter Wise Mock Test – Properties of Matter

NEET Physics Chapter Wise Mock Test – Properties of Matter

Question 1:
A body of mass m = 10 kg is attached to a wire of length 0.3 m. The maximum angular velocity with which it can be rotated in a horizontal circle is (Breaking stress of wire = 4.8 x 10⁷ N/m² and area of cross-section of wire =10^-6 m²)
(a) 4 rad/s
(b) 8 rad/s
(c) 1 rad/s
(d) 2 rad/s

Question 2:
The breaking stress for a copper wire is 2.2 x 10⁸ Nm^-2. The maximum length of the copper wire which when suspended vertically for which the wire will not break under its own weight, will be (Density of copper = 8.8 x 10³ kgm^-3)
(a) 25000m
(b) 2500m
(c) 250m
(d) 25m

Question 3:

Question 4:

Question 5:

Question 6:
A wire is stretched through 1 mm by certain load. The extension produced in the wire of same material with double the length and double the radius will be
(a) 4 mm
(b) 3 mm
(c) 1 mm
(d) 0.5 mm

Question 7:
A 10 m long thick rubber pipe is suspended from one of its ends. The extension produced in the pipe under its own weight will be (Y = 5 x 10⁶ Nm^-2 and density of rubber = 1500 kg m^-3)
(a) 1.5 m
(b) 0.15 m
(c) 0.015 m
(d) 0.0015 m

Question 8:

Question 9:
A copper wire (Y =1 x10¹¹ Nm^-2) of length 6 m and a steel wire (Y = 2 x10¹¹ Nm^-2) of length 4 m each of cross-section 10^-5 m² are fastened end to end and stretched by a tension of 100 N. The elongation produced in the copper wire is
(a) 0.2 mm
(b) 0.4 mm
(c) 0.6 mm
(d) 0.8 mm

Question 10:

Question 11:
A solid cylindrical rod of radius 3 mm gets depressed under the influence of a load through 8 mm. The depression produced in an identical hollow rod with outer and inner radii of 4 mm and 2 mm respectively, will be
(a) 2.7 mm
(b) 1.9 mm
(c) 3.2 mm
(d) 7.7 mm

Question 12:

Question 13:
If the tension on a wire is removed at once, then
(a) it will break
(b) its temperature will reduce
(c) there will be no change in its temperature
(d) its temperature increases

Question 14:
The length of a wire increases by l due to a force F applied on it. Then, the work done W in stretching the
wire will be
(a) W=Fl
(b) W=Fl/4
(c) W=Fl/2
(d) W=Fl/3

Question 15:

Question 16:

Question 17:
Why the dam of water reservoir is thick at the bottom?
(a) Quantity of water increases with depth
(b) Density of water increases with depth
(c) Pressure of water increases with depth
(d) Temperature of water increases with depth

Question 18:

Question 19:
A good lubricant should have
(a) high viscosity
(b) low viscosity
(c) moderate viscosity
(d) high density

Question 20:
A capillary tube is attached horizontally to a constant heat arrangement. If the radius of the capillary tube is increased by 10%, then the rate of flow of liquid will change nearly by
(a) + 10%
(b) + 46%
(c) -10%
(d) – 40%

Question 21:

Question 22:
In which one of the following cases will the liquid flow in a pipe be most streamlined?
(a) Liquid of high viscosity and high density flowing through a pipe of small radius
(b) Liquid of high viscosity and low density flowing through a pipe of small radius
(c) Liquid of low viscosity and low density flowing through a pipe of large radius
(d) Liquid of low viscosity and high density flowing through a pipe of large radius

Question 23:
Two water pipes of diameters 2 cm and 4 cm are connected with the main supply line. The velocity of flow of water in the pipe of 2 cm diameter is
(a) 4 times that in the other pipe
(b) 1/4 times that in the other pipe 4
(c) 2 times that in the other pipe
(d) 1/2 times that in the other pipe

Question 24:
Aerofoils are so designed that the speed of air
(a) on top side is more than on lower side
(b) on top side is less than on lower side
(c) is same on both sides
(d) is turbulent

Question 25:

Question 26:
A cylinder of height 20 m is completely filled with water. The velocity of efflux of water (in ms^-1) through a small hole on the side wall of the cylinder near its bottom is
(a) 10
(b) 20
(c) 25.5
(d) 5

Question 27:

Question 28:

Question 29:
The angle of contact between glass and water is 0° and it rises in a capillary upto 6 cm when its surface tension is 70 dyne cm^-1. Another liquid of surface tension 140 dyne cm^-1, angle of contact 60° and relative density 2 will rise in the same capillary by
(a) 12 cm
(b) 24 cm
(c) 3 cm
(d) 6 cm

Question 30:
A capillary tube of radius 0.25mm is submerged vertically in water, so that 25 mm of its length is outside water. The radius of curvature of the meniscus will be
(ST of water = 75 x 10^-3 Nm^-1)
(a) 0.2 mm
(b) 0.4 mm
(c) 0.6 mm
(d) 0.8 mm

Question 31:

Question 32:

Question 33:

Question 34:

Question 35:
If there were no gravity, which of the following will not be there for a fluid?
(a) Viscosity
(b) Surface tension
(c) Pressure
(d) Archimedes’ upward thrust

Question 36:
A wind with speed 40 m/s blows parallel to the roof of a house. The area of the roof is 250 m². Assuming that the pressure inside the house is atmospheric pressure, the force exerted by the wind on the roof and the direction of the force will be (ρ_air = 1.2 kg/m³)
(a) 4.8x 10⁵ N, downwards
(b) 4.8 x 10⁵ N, upwards
(c) 2.4 x 10⁵ N, upwards
(d) 2.4x 10⁵ N, downwards

Question 37:
The approximate depth of an ocean is 2700 m. The compressibility of water is 45.4x 10^-11 Pa^-1 and density of water is 10³ kg/m³. What fractional compression of vfcater will be obtained at the bottom of the ocean?
(a) 0.8x 10^-2
(b) 1.0x 10^-2
(c) 1.2x 10^-2
(d) 1.4x 10^-2

Question 38:

Question 39:
Copper of fixed volume V is drawn into wire of length l. When this wire is subjected to a constant force F, the extension produced in the wire is Δl. Which of the following graphs is a straight line?
(a) Δl versus 1/l
(b) Δl versus l²
(c) Δl versus 1/l²
(d) Δl versus l

Question 40:
Assertion (A): A small drop of mercury is spherical but bigger drops are oval in shape.
Reason (R): Surface tension of liquid decrease with increase in temperature.
(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

Question 41:
The wettability of surface by a liquid depends primarily on
(a) viscosity
(b) surface tension
(c) density
(d) angle of contact-between the surface and the liquid

Question 42:
The following four wires are made of the same material. Which of these will the largest extension when the same tension is applied?
(a) Length = 50 cm diameter = 0.5 mm
(b) Length = 100 cm diameter = 1 mm
(c) Length = 200 cm diameter = 2 mm
(d) Length = 300 cm diameter = 3 mm

Question 43:
A cubical copper block has each side 2.0 cm. It is suspended by a string and submerged in oil of density 820 kg/m³. The tension in the string is (density of copper 8920 kg/m³, g = 10 m/s²).
(a) 0.648 N
(b) 0.712 N
(c) 0.66N
(d) 1.37N

Question 44:
An ice-berg of density 900 kgm^-3 is floating in water of density 1000 kgm^-3. The percentage of volume of ice-berg outside the water is
(a) 20%
(b) 35%
(c) 10%
(d) 11%

Direction (Q. NOS. 45-46): 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

Question 45:

Question 46:
Assertion (A): To float, a body must displace liquid whose weight is greater than actual weight of the body.
Reason (R): During floating the body will experience no net downward force in that case.

Question 47:
In steel, the Young’s modulus and the strain at the breaking point are 2 x1011 N/m2 and 0.15 respectively. The stress at the breaking point for steel is therefore
(a) 2 x10⁸ N/m²
(b) 3×10¹⁰ N/m²
(c) 3×10¹² N/m²
(d) None of these

Question 48:
In designing, beam for its use to support a load. The depression at centre is proportional to (where, Y is Young’s modulus)
(a) Y²
(b) Y
(c) 1/Y
(d) 1/Y²

Question 49:
A force F is applied on the wire of radius r and length L and change in the length of wire is l. If the same force F is applied on the wire of the
(a) l/2
(b) 2l/2
(c) 3l/2
(d) None of these

Question 50:

Answers:

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