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Explore popular questions from Properties of Bulk Matter for NEET. This collection covers Properties of Bulk Matter previous year NEET questions hand picked by experienced teachers.

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Properties of Bulk Matter

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Q 1. The density of water at {tex} 20 ^ { \circ } \mathrm { C } {/tex} is 998{tex} \mathrm { kg } / \mathrm { m } ^ { 3 } {/tex} and at {tex} 40 ^ { \circ } \mathrm { C } \ 992 {/tex} {tex} \mathrm { kg } / \mathrm { m } ^ { 3 } . {/tex} The coefficient of volume expansion of water is

A

{tex} 10 ^ { - 4 / {^ \circ }} \mathrm { C } {/tex}

{tex} 3 \times 10 ^ { - 4 / ^ { \circ } }\mathrm { C } {/tex}

C

{tex} 2 \times 10 ^ { - 4 } / ^ { \circ } \mathrm { C } {/tex}

D

{tex} 6 \times 10 ^ { - 4 } / ^ { \circ } \mathrm { C } {/tex}

Explanation


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Q 2. A piece of ice falls from a height h so that it melts completely. Only one-quarter of the heat produced is absorbed by the ice and all energy of ice gets converted into heat during its fall. The value of h is: {tex} \left. \text { [Latent heat of ice is } 3.4 \times 10 ^ { 5 } \mathrm { J } / \mathrm { kg } = 10 \mathrm { N } / \mathrm { kg } \right] {/tex}

A

34{tex} \mathrm { km } {/tex}

B

544{tex} \mathrm { km } {/tex}

136{tex} \mathrm { km } {/tex}

D

68{tex} \mathrm { km } {/tex}

Explanation


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Q 3. A body of mass {tex} \mathrm { 5kg } {/tex} falls from a height of {tex}20{/tex} metres on the ground and it rebounds to a height of {tex} 0.2 \mathrm { m } . {/tex} If the loss in potential energy is used up by the body, then what will be the temperature rise?
(specific heat of material = {tex}\mathrm{0.09\,cal\,gm^{-1} {^\circ} C ^{-1}}{/tex})

A

{tex} 0 ^ { \circ } \mathrm { C } {/tex}

B

{tex} 4 ^ { \circ } \mathrm { C } {/tex}

C

{tex} 8 ^ { \circ } \mathrm { C } {/tex}

None of these

Explanation


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Q 4. Two straight metallic strips each of thickness {tex}t{/tex} and length {tex} \ell {/tex} are rivetted together. Their coefficients of linear expansions are {tex} \alpha _ { 1 } {/tex} and {tex} \alpha _ { 2 } {/tex} . If they are heated through temperature {tex} \Delta \mathrm { T } {/tex} , the bimetallic strip will bend to form an arc of radius

A

{tex} \mathrm { \frac { t } {\left( \alpha _ { 1 } + \alpha _ { 2 } \right) \Delta T }} {/tex}

{tex} \mathrm { \frac { t } {\left( \alpha _ { 2 } - \alpha _ { 1 } \right) \Delta T }} {/tex}

C

{tex} \mathrm { { t } {\left( \alpha _ { 1 } - \alpha _ { 2 } \right) \Delta T }} {/tex}

D

{tex} \mathrm { { t } {\left( \alpha _ { 2 } - \alpha _ { 1 } \right) \Delta T }} {/tex}

Explanation

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Q 5. Which of the following will expand the most for same rise in temperature?

Aluminium

B

Glass

C

Wood

D

All will expand same

Explanation

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Q 6. The plots of intensity versus wavelength for three black bodies at temperatures {tex} T _ { 1 } , T _ { 2 } {/tex} and {tex} T _ { 3 } {/tex} respectively are as shown. Their temperature are such that

A

{tex} T _ { 1 } > T _ { 2 } > T _ { 3 } {/tex}

{tex} T _ { 1 } > T _ { 3 } > T _ { 2 } {/tex}

C

{tex} T _ { 2 } > T _ { 3 } > T _ { 1 } {/tex}

D

{tex} T _ { 3 } > T _ { 2 } > T _ { 1 } {/tex}

Explanation

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Q 7. When the temperature of a rod increases from {tex}\mathrm t{/tex} to {tex} \mathrm { t } + \Delta \mathrm { t } {/tex} , its moment of inertia increases from {tex}\mathrm I{/tex} to {tex} \mathrm { I } + \Delta \mathrm { I } {/tex} . If {tex} \alpha {/tex} be the coefficient of linear expansion of the rod, then the value of {tex} \frac { \Delta \mathrm { I } } { \mathrm { I } } {/tex} is

2{tex} \alpha \triangle t {/tex}

B

{tex} \alpha \Delta \mathrm { T } {/tex}

C

{tex} \frac { \alpha \Delta t } { 2 } {/tex}

D

{tex} \frac { \Delta \mathrm { t } } { \alpha } {/tex}

Explanation



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Q 8. Two rods, one of aluminum and the other made of steel, having initial length {tex} \ell _ { 1 } {/tex} and {tex} \ell _ { 2 } {/tex} are connected together to form a single rod of length {tex} \ell _ { 1 } + \ell _ { 2 } . {/tex} The coefficients of linear expansion for aluminum and steel are {tex} \alpha _ { a } {/tex} and {tex} \alpha _ { s } {/tex} and respectively. If the length of each rod increases by the same amount when their temperature are raised by {tex} t ^ { 0 } \mathrm { C } , {/tex} then find the ratio {tex} \ell _ { 1 } / \left( \ell _ { 1 } + \ell _ { 2 } \right) {/tex}

A

{tex} \alpha_s / \alpha_a {/tex}

B

{tex} \alpha _ { a } / \alpha _ { s } {/tex}

{tex} \alpha_s / \left( \alpha _ { a } + \alpha _ { s } \right) {/tex}

D

{tex} \alpha _ { a } / \left( \alpha _ { a } + \alpha _ { s } \right) {/tex}

Explanation

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Q 9. On observing light from three different stars {tex} \mathrm { P } , \mathrm { Q } {/tex} and {tex} \mathrm { R } {/tex} , it was found that intensity of violet colour is maximum in the spectrum of {tex} \mathrm { P } {/tex} , the intensity of green colour is maximum in the spectrum of {tex} \mathrm { R } {/tex} and the intensity of red colour is maximum in the spectrum of {tex} \mathrm { Q } {/tex}. If {tex} \mathrm T_{ \mathrm P},\, \mathrm T _ { \mathrm Q } {/tex} and {tex} \mathrm T _ { \mathrm R } {/tex} are the respective absolute temperature of {tex} \mathrm{P , Q} {/tex} and {tex} \mathrm R , {/tex} then it can be concluded from the above observations that

{tex} \mathrm { T } _ { \mathrm { p } } > \mathrm { T } _ { \mathrm { R } } > \mathrm { T } _ { \mathrm { Q } } {/tex}

B

{tex} \mathrm { T } _ { \mathrm { p } } < \mathrm { T } _ { \mathrm { R } } < \mathrm { T } _ { \mathrm { Q } } {/tex}

C

{tex} \mathrm { T } _ { \mathrm { p } } < \mathrm { T } _ { \mathrm { Q } } < \mathrm { T } _ { \mathrm { R } } {/tex}

D

{tex} \mathrm { T } _ { \mathrm { P } } > \mathrm { T } _ { \mathrm { Q } } ^ { } > \mathrm { T } _ { \mathrm { R } } ^ { } {/tex}

Explanation

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Q 10. Which of the following statements is/are false about mode of heat transfer?

A

In radiation, heat is transfered from one medium to another without affecting the intervening medium

Radiation and convection are possible in vaccum while conduction requires material medium

C

Conduction is possible in solids while convection occurs in liquids and gases

D

All are correct

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Q 11. Two rods of same length and transfer a given amount of heat 12 second, when they are joined as shown in figure
(i). But when they are joined as shown in figure
(ii), then they will transfer same heat in same conditions in

A

24{tex} \mathrm { s } {/tex}

B

13{tex} \mathrm { s } {/tex}

C

15{tex} \mathrm { s } {/tex}

48{tex} \mathrm { s } {/tex}

Explanation

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Q 12. The radiation energy density per unit wavelength at a temperature {tex}\mathrm T{/tex} has a maximum at a wavelength {tex} \lambda _ { 0 } . {/tex} At temperature {tex} 2 \mathrm { T } , {/tex} it will have a maximum wavelength

A

4{tex} \lambda _ { 0 } {/tex}

B

2{tex} \lambda _ { 0 } {/tex}

{tex} \frac { \lambda _ { 0 } } { 2 } {/tex}

D

{tex} \frac { \lambda _ { 0 } } { 4 } {/tex}

Explanation

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Q 13. A metal ball immersed in alcohol weighs {tex} \mathrm { W } _ { 1 } {/tex} at {tex} 0 ^ { \circ } \mathrm { C } {/tex} and {tex} \mathrm { W } _ { 2 } {/tex} at {tex} 50 ^ { \circ } \mathrm { C } . {/tex} The coefficient of cubical expansion of the metal is less than that of alcohol. Assuming that the density of the metal is large compared to that of alcohol, it can be shown that

A

{tex} \mathrm { W } _ { 1 } > \mathrm { W } _ { 2 } {/tex}

B

{tex} \mathrm { W } _ { 1 } = \mathrm { W } _ { 2 } {/tex}

{tex} \mathrm { W } _ { 1 } < \mathrm { W } _ { 2 } {/tex}

D

{tex} \mathrm { W } _ { 1 } = \left( \mathrm { W } _ { 2 } / 2 \right) {/tex}

Explanation

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Q 14. One end of a thermally insulated rod is kept at a temperature {tex} T _ { 1 } {/tex} and the other at {tex} T _ { 2 } {/tex} . The rod is composed of two sections of length {tex} l _ { 1 } {/tex} and {tex} l _ { 2 } {/tex} and thermal conductivities {tex} K _ { 1 } {/tex} and {tex} K _ { 2 } {/tex} respectively. The temperature at the interface of the two sections is

A

{tex} \frac { \left( K _ { 1 } l _ { 1 } T _ { 1 } + K _ { 2 } l _ { 2 } T _ { 2 } \right) } { \left( K _ { 1 } l _ { 1 } + K _ { 2 } l _ { 2 } \right) } {/tex}

B

{tex} \frac { \left( K _ { 2 } l _ { 2 } T _ { 1 } + K _ { 1 } l _ { 1 } T _ { 2 } \right) } { \left( K _ { 1 } l _ { 1 } + K _ { 2 } l _ { 2 } \right) } {/tex}

C

{tex} \frac { \left( K _ { 2 } l _ { 1 } T _ { 1 } + K _ { 1 } l _ { 2 } T _ { 2 } \right) } { \left( K _ { 2 } l _ { 1 } + K _ { 1 } l _ { 2 } \right) } {/tex}

{tex} \frac { \left( K _ { 1 } l _ { 2 } T _ { 1 } + K _ { 2 } l _ { 1 } T _ { 2 } \right) } { \left( K _ { 1 } l _ { 2 } + K _ { 2 } l _ { 1 } \right) } {/tex}

Explanation



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Q 15. A black body has maximum wavelength {tex} \lambda _ { m } {/tex} at temperature 2000{tex} \mathrm { K } {/tex} . Its corresponding wavelength at temperature 3000 {tex} \mathrm { K } {/tex} will be

A

{tex} \frac { 3 } { 2 } \lambda _ { m } {/tex}

{tex} \frac { 2 } { 3 } \lambda _ { m } {/tex}

C

{tex} \frac { 4 } { 9 } \lambda _ { m } {/tex}

D

{tex} \frac { 9 } { 4 } \lambda _ { m } {/tex}

Explanation



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Q 16. In materials like aluminium and copper, the correct order of magnitude of various elastic moduli is:

A

Young's modulus {tex} < {/tex} shear modulus {tex} < {/tex} bulk moduli

B

Bulk modulus {tex} < {/tex} shear modulus {tex} < {/tex} Young's moduli

Shear modulus {tex} < {/tex} Young's modulus < bulk moduli

D

Bulk modulus < Young's modulus < shear moduli

Explanation


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Q 17. A material has poisson's ratio {tex} 0.50 . {/tex} If a uniform rod of it suffers a longitudinal strain of {tex} 2 \times 10 ^ { - 3 } , {/tex} then the percentage change in volume is

A

0.6

0

C

0.2

D

0.8

Explanation

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Q 18. A material has poisson's ratio 0.50. If a uniform rod of it suffers a longitudinal strain of 2 x 10-3 then the percentage change in volume is

A

0.6

0

C

0.4

D

0.2

Explanation

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Q 19. The pressure on an object of bulk modulus B undergoing hydraulic compression due to a stress exerted by surrounding fluid having volume strain {tex}\left(\frac{\Delta V}{V}\right)^{2}{/tex} is

A

{tex} B ^ { 2 } \left( \frac { \Delta V } { V } \right) {/tex}

B

{tex} { B } \left( \frac { \Delta { V } } { { V } } \right) ^ { 2 } {/tex}

C

{tex} \frac { 1 } { B } \left( \frac { \Delta V } { V } \right) {/tex}

{tex} { B } \left( \frac { \Delta { V } } { \mathrm { V } } \right) {/tex}

Explanation

Bulk modulus {tex} B ={/tex} {tex} \frac {|-dp|}{| \frac{dV}{V}|} {/tex} Pressure, {tex} dP= B (\frac {\Delta V}{V}) {/tex}

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Q 20. The diagram shows a force extension graph for a rubber band. Consider the following statements :


I. It will be easier to compress this rubber than expand it
II. Rubber does not return to its original length after it is stretched
III. The rubber band will get heated if it is stretched and released
Which of these can be deduced from the graph:

III only

B

II and III

C

I and III

D

I only

Explanation

Area of hysterisis loop gives the energy loss in the process of stretching and unstretching of rubber band and this loss will appear in the form of heating.

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Q 21. The density of water at the surface of ocean is {tex} \rho . {/tex} If the bulk modulus of water is {tex} \mathrm { B } , {/tex} what is the density of ocean water at a depth where the pressure is {tex} \mathrm { nP } _ { 0 } , {/tex} where {tex} \mathrm { P } _ { 0 } {/tex} is the atmospheric pressure?

{tex} \frac { \rho \mathrm { B } } { \mathrm { B } - ( \mathrm { n } - 1 ) \mathrm { P } _ { 0 } } {/tex}

B

{tex} \frac { \rho \mathrm { B } } { \mathrm { B } + ( \mathrm { n } - 1 ) \mathrm { P } _ { 0 } } {/tex}

C

{tex} \frac { \rho \mathrm { B } } { \mathrm { B } - \mathrm { nP } _ { 0 } } {/tex}

D

{tex} \frac { \rho \mathrm { B } } { \mathrm { B } + \mathrm { nP } _ { 0 } } {/tex}

Explanation


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Q 22. A ball of radius r and density ρ falls freely under gravity through a distance h before entering water. Velocity of ball does not change even on entering water. If viscosity of water is η the value of h is given by

A

{tex} \frac { 2 } { 9 } r ^ { 2 } \left( \frac { 1 - \rho } { \eta } \right) g {/tex}

B

{tex} \frac { 2 } { 81 } r ^ { 2 } \left( \frac { \rho - 1 } { \eta } \right) g {/tex}

{tex} \frac { 2 } { 81 } r ^ { 4 } \left( \frac { \rho - 1 } { \eta } \right) ^ { 2 } g {/tex}

D

{tex} \frac { 2 } { 9 } r ^ { 4 } \left( \frac { \rho - 1 } { \eta } \right) ^ { 2 } g {/tex}

Explanation


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Q 23. A lead shot of 1 mm diameter falls through a long column of glycerine. The variation of its velocity v with distance covered is represented by

B

C

D

Explanation

When a body falls through a viscous liquid, its velocity increases due to gravity but after some time its velocity becomes uniform because of viscous force becoming equal to the gravitational force. Viscous force itself is variable force which increases as velocity increases, so curve A is the correct answer.

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Q 24. A water tank of height 10 m completely filled with water is placed on a level ground. It has two holes one at 3 m and the other at 7 m from its base. The water ejecting from

both the holes will fall at the same spot

B

upper hole will fall farther than that from the lower hole

C

upper hole will fall closer than that from the lower hole

D

more information is required

Explanation

Range is same for holes equal distance from top and bottom of tank.

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Q 25. Two capillary of length L and 2L and of radius R and 2R are connected in series. The net rate of flow of fluid through them will be (given rate to the flow through single capillary, {tex} X = \frac { \pi \mathrm { PR } ^ { 4 } } { 8 \eta \mathrm { L } } {/tex})

{tex} \frac { 8 } { 9 } X {/tex}

B

{tex} \frac { 9 } { 8 } { X } {/tex}

C

{tex} \frac { 5 } { 7 } X {/tex}

D

{tex} \frac { 7 } { 5 } X {/tex}

Explanation



{tex}\mathrm{When \space two \space capillary \space tubes \space are \space joined \space in \space series,then \space equivalent \space resistance \space is}{/tex}