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## Properties of Matter

### Physics

#### Previous Years Questions

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Given below are two statements : One is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A)...
NEET 2022
If a soap bubble expands, the pressure inside the bubble
NEET 2022
A spherical ball is dropped in a long column of a highly viscous liquid. The curve in the graph shown, which represents ...
NEET 2022
The velocity of a small ball of mass M and density d, when dropped in a container filled with glycerin becomes constant ...
NEET 2021
A wire of length L, are of cross section A is hanging from a fixed support. The length of the wire changed to L1 when ma...
NEET 2020 Phase 1
A capillary tube of radius r is immersed in water and water rises in it to a height h. The mass of the water in the capi...
NEET 2020 Phase 1
A soap bubble, having radius of 1 mm, is blown from a detergent solution having a surface tension of 2.5 $$\times$$ 10...
NEET 2019
The unit of thermal conductivity is :
NEET 2019
A small hole of area of cross-section 2 mm2 present near the bottom of a fully filled open tank of height 2 m. Taking g...
NEET 2019
When a block of mass M is suspended by a long wire of length L, the length of the wire becomes (L + $$l$$). The elastic ...
NEET 2019
A copper rod of 88 cm and an aluminium rod of unknown length have their increase in length independent of increase in tm...
NEET 2019
A small sphere of radius ‘r’ falls from rest in a viscous liquid. As a result, heat is produced due to viscous force. Th...
NEET 2018
Two wires are made of the same material and have the same volume. The first wire has cross-sectional area A and the seco...
NEET 2018
The power radiated by a black body is P and it radiates maximum energy at wavelength, $$\lambda$$0 . If the temperature...
NEET 2018
Two rods A and B of different materials are welded together as shown in figure. Their thermal conductivities are K1 and ...
NEET 2017
A spherical black body with a radius of 12 cm radiates 450 watt power at 500 K. If the radius were halved and the temper...
NEET 2017
A U tube with both ends open to the atmosphere, is partially filled with water. Oil, which is immiscible with water, is...
NEET 2017
The bulk modulus of a spherical object is 'B'. If it is subjected to uniform pressure 'P', the fractional decrease in r...
NEET 2017
A black body is at a temperature of 5760 K. The energy of radiation emitted by the body at wavelength 250 nm is U1, at w...
NEET 2016 Phase 1
Two non-mixing liquids of densities $$\rho$$ and n$$\rho$$ (n &gt; 1) are put in a container. The height of each liqui...
NEET 2016 Phase 1
A piece of ice falls from a height h so that it melts completely. Only one-quarter of the heat produced is absorbed by t...
NEET 2016 Phase 1
Three liquids of densities $$\rho$$1, $$\rho$$2&nbsp;&nbsp;and $$\rho$$3 (with $$\rho$$1 &gt; $$\rho$$2 &gt; $$\rho... NEET 2016 Phase 2 A rectangular film of liquid is extended from (4 cm$$ \times $$2 cm) to (5 cm$$ \times $$4 cm). If the work done is ... NEET 2016 Phase 2 Two identical bodies are made of a material for which the heat capacity increases with temperature. One of these is at 1... NEET 2016 Phase 2 Coefficient of linear expansion of brass and steel rods are$$\alpha $$1 and$$\alpha $$2. Lengths of brass and steel ro... NEET 2016 Phase 1 A body cools from a temperature 3T to 2T in 10 minutes. The room temperature is T. Assume that Newton's law of cooling i... NEET 2016 Phase 2 The approximate depth of an ocean is 2700 m. The compressiblity of water is 45.4$$ \times $$10$$-$$11 Pa$$-$$1 and den... AIPMT 2015 Cancelled Paper On observing light from three different starts P, Q and R, it was found that intensity of violet colour is maximum in th... AIPMT 2015 Cancelled Paper A wind with speed 40 m/s blows parallel to the roof of a house. The area of the roof is 250 m2. Assuming that the pressu... AIPMT 2015 Cancelled Paper The two ends of a metal rod are maintained at temperatures 100oC and 110oC. The rate of heat flow in the rod is found to... AIPMT 2015 Cancelled Paper The Young's modulus of steel is twice that of brass. Two wires of same length and of same area of cross section, one of ... AIPMT 2015 Water rises to a height h in capillary tube. If the length of capillary tube above the surface of water is made less tha... AIPMT 2015 The cylindrical tube of a spray pump has radius R, one end of which has n fine holes, each of radius r. If the speed of ... AIPMT 2015 The value of coefficient of volume expansion of glycerin is 5$$ \times $$10$$-$$4 K$$-$$1. The fractional change in th... AIPMT 2015 Certain quantity of water cools from 70oC to 60oC in the first 5 minutes and to 54oC in the next 5 minutes. The temperat... AIPMT 2014 Steam at 100oC is passed into 20 g of water at 10oC. When water acquires a temperature of 80oC, the mass of water presen... AIPMT 2014 A certain number of spherical drops of a liquid of radius r coalesce to form a single drop of radius R and volume V. If ... AIPMT 2014 Copper of fixed volume V is drawn into wire of length$$l$$. When this wire is subjected to a constant force F, the exte... AIPMT 2014 The density of water at 20oC is 998 kg/m3 and at 40oC is 992 kg/m3. The coefficient of volume expansion of water is ... NEET 2013 (Karnataka) A fluid is in streamline flow across a horizontal pipe of variable area of cross section. For this which of the followin... NEET 2013 (Karnataka) If the ratio of diameters, lengths and Young's modulus of steel and copper wires shown in the figure are p, q and s resp... NEET 2013 (Karnataka) Two metal rods 1 and 2 of same lengths have same temperature difference between their ends. Their thermal conductivities... NEET 2013 (Karnataka) The wettability of a surface by a liquid depends primarily on NEET 2013 The following four wires are made of the same material. Which of these will have the largest extension when the same ten... NEET 2013 The molar specific heats of an ideal gas at constant pressure and volume are denoted by Cp and Cv, respectively. If &nbs... NEET 2013 A piece of iron is heated in a flame. It first becomes dull red then becomes reddish yellow and finally turns to white h... NEET 2013 A slab of stone of area 0.36 m2 and thickness 0.1 m is exposed on the lower surface to steam at 100oC. A block of ice at... AIPMT 2012 Mains If the radius of a star is R and it acts as a black body, what would be the temperature of the star, in which the rate o... AIPMT 2012 Prelims Liquid oxygen at 50 K is heated to 300 K at constant pressure of 1 atm. The rate of heating is constant. Which one of th... AIPMT 2012 Prelims Assuming the sun to have a spherical outer surface of radius r, radiating like a black body at temperature toC, the powe... AIPMT 2010 Prelims The total radiant energy per unit area, normal to the direction of incidence, received at a distance R from the centre o... AIPMT 2010 Prelims A cylindrical metallic rod in thermal contact with two reservoirs of heat at its two ends conducts an amount of heat Q i... AIPMT 2010 Prelims The two ends of a rod of length L and a uniform cross-sectional area A are Kept at two temperatures T1 and T2 (T1 &gt; T... AIPMT 2009 A black body at 227oC radiates heat at the rate of 7 cals/cm2s. At a temperature of 727oC, the rate of heat radiated in ... AIPMT 2009 On a new scale of temperature (which is linear) and called the W scale, the freezing and boiling points of water are 39o... AIPMT 2008 A black body is at 727oC. It emits energy at a rate which is proportional to AIPMT 2007 Assuming the sun to have a spherical outer surface of radius r, radiating like a black body at temperature toC, the powe... AIPMT 2007 A black body at 1227oC emits radiations with maximum intensity at a wavelength of 5000$$\mathop A\limits^ \circ $$. If... AIPMT 2006 Which of the following rods, (given radius r and length$$l$$) each made of the same material and whose ends are maintai... AIPMT 2005 If$$\lambda $$m denotes the wavelength at which the radioactive amission from a black body at a temperature TK is max... AIPMT 2004 Consider a compound slab consisting of two different materials having equal thicknesses and thermal conductivities K and... AIPMT 2003 The Wien's displacement law express relation between AIPMT 2002 Which of the following is best close to an ideal black body? AIPMT 2002 Consider two rods of same length and different specific heats (S1, S2), conductivities (K1, K2) and area of cross-sectio... AIPMT 2002 For a black body at temperature 727oC, its radiating power is 60 watt and temperature of surrounding is 227oC. If temper... AIPMT 2002 Unit of Stefan's constant is AIPMT 2002 A cylindrical rod having temperature T1 and T2 at its end. The rate of flow of heat Q1 cal/sec. If all the linear dimens... AIPMT 2001 A black body has maximum wavelength$$\lambda m at 2000 K. Its corresponding wavelength at 3000 K will be
AIPMT 2000

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