JEE Questions for Physics Thermal Properties Of Matter Quiz 9 - MCQExams.com

There are two identical small holes on the opposite sides of a tank containing a liquid. The tank is open at the top. The difference in height between the two holes is h. As the liquid comes out of the two holes, the tank will experience a net horizontal force proportional to
Physics-Thermal Properties of Matter-91122.png
  • h1/2
  • h3/2
  • h
  • h2
A liquid is kept in a cylindrical vessel which is rotated along its axis. The liquid rises at the sides (Fig). If the radius of the vessel is 0.05 m and the speed of rotation is 2 red/s, find the difference in the height of the liquid at the centre of the vessel and its sides.
Physics-Thermal Properties of Matter-91124.png
  • 20 cm
  • 4 cm
  • 2 cm
  • 0.2 cm
A fire hydrant delivers water of density ρ at a volume rate L. The water travels vertically upwards through the hydrant and then does 90o turn to emerge horizontally at speed υ. The pipe and nozzle have uniform cross section throughout. The force exerted by water on the corner of the hydrant is
  • zero
  • ρ υ L

  • Physics-Thermal Properties of Matter-91126.png
  • 2 ρ υ L
A block is submerged in vessel filled with water by a spring attached to the bottom of the vessel. In equilibrium, the spring is compressed. The vessel now moves downwards with an acceleration a (< g). The spring length
Physics-Thermal Properties of Matter-91128.png
  • will become zero
  • will decrease but not zero
  • will increase
  • may increase or decrease or remain constant
An ice block having two similar metallic pieces is floating in water in a vessel, as shown in Fig. After sometime the ice melts completely, then
Physics-Thermal Properties of Matter-91130.png
  • the water level rises in the vessel
  • the water level falls in the vessel
  • the water level does not change in the vessel
  • the water level may rise or fall depending upon the ratio of masses of ice and metallic pieces
recently, the phenomenon of superconductivity has been observed at 95 K. This temperature is nearly equal to
  • –288oF
  • –146oF
  • –368oF
  • 178oF
The temperature of a substance increases by 27oC. On the Kelvin scale the increase is equal to
  • 300 K
  • 2.46 K
  • 27 K
  • 7 K
The resistance of a resistance thermometer has values 2.71 and 3.70 ohm at 10oC and 100oC. The temperature at which the resistance is 3.26 ohm is
  • 40oC
  • 50oC
  • 60oC
  • 70oC
Two rectangular blocks, having identical dimensions, can be arranged either in configuration II as shown in the figure. One of the blocks has thermal conductivity k and the other 2k. The temperature difference between the ends along the x-axis is the same in both the configurations. It takes 9 s to transport a certain amount of heat from the hot end to the cold end in the configuration I. The time to transport the same amount of heat in the configuration II is
Physics-Thermal Properties of Matter-91135.png
  • 4 sec
  • 3 sec
  • 2 sec
  • 1 sec
Absolute scale of temperature is reproduced in the laboratory by making use of a
  • Radiation pyrometer
  • Platinum resistance thermometer
  • Constant volume helium gas thermometer
  • Constant pressure ideal gas thermometer
Absolute zero (0 K) is that temperature at which
  • Matter ceases to exist
  • Ice melts and water freeezes
  • Volume and pressure of a gas become zero
  • None of these
On which of the following scales of temperature, the temperature is never negative?
  • Celsius
  • Fahrenheit
  • Reaumur
  • Kelvin
One quality of a thermometer is that its heat capacity should be small. If P is a mercury thermometer, Q is a resistance thermometer and R thermocouple type then
  • P is best, R worst
  • R is best, P worst
  • R is best, Q worst
  • P is best, Q worst
Two thermometer are used to record the temperature of a room. If the bulb of one is wrapped in wet hanky
  • The temperature recorded by both willl be same
  • The temperature recorded by wet-bulb thermometer will be greater than that recorded by the other
  • The temperature recorded by dry-bulb thermometer will be greatre than that recorded by the other
  • None of the above
A centigrade and a Fahrenheit thermometer are dipped in boiling water. The water temperature is lowered until the Fahrenheit thermometer registers 140o. What is the fall in temperature as registered by the Centigrade thermometer?
  • 30o
  • 40o
  • 60o
  • 80o
Standardisation of thermometers is obtained with
  • Jolly's thermometer
  • Platinum resistance thermometer
  • Thermocouple thermometer
  • Gas thermometer
Mercury thermometers can be used to measure temperature upto
  • 100oC
  • 212oC
  • 360oC
  • 500oC
A constant volume gas thermometer shows pressure reading of 50 cm and 90 cm of mercury at 0oC and 100oC respectively. When the pressure reading is 60 cm of mercury, the temperature is
  • 25oC
  • 40oC
  • 15oC
  • 12.5oC
If the temperature of an object is 140oF, then its temperature in centigrade is
  • 105oC
  • 32oC
  • 140oC
  • 60oC
On centigrade scale, the temperature of a body increases by 30oC. The increase in temperature on Fahrenheit scale is
  • 50oC
  • 40oC
  • 30oC
  • 54oC
When the room temperature becomes equal to the dew point, the relative humidity of the room is
  • 100%
  • 0%
  • 70%
  • 85%
When a copper ball is heated, the largest percentage increase will occur in its
  • Diameter
  • Area
  • Volume
  • Density
A vertical column 50 cm long at 50oC balances another column of same liquid 60 cm long at 100oC. The coefficient of absolute expansion of the liquid is
  • 0.005/oC
  • 0.0005/oC
  • 0.002/oC
  • 0.0002/oC
The apparent coefficient of expansion of a liquid when heated in a copper vessel is C and when heated in a silver vessel is S. If A is the linear coefficient of expansion of copper, then the linear coefficient of expansion of silver is

  • Physics-Thermal Properties of Matter-91146.png
  • 2)
    Physics-Thermal Properties of Matter-91147.png

  • Physics-Thermal Properties of Matter-91148.png

  • Physics-Thermal Properties of Matter-91149.png
A uniform metal rod is used as a bar pendulum. If the room temperature rises by 10oC, and the coefficient of linear expansion of the metal of the rod is 2 × 10–6 per oC, the period of the pendulum will have percentage increase of
  • – 2 × 10–3
  • –1 × 10–3
  • 2 × 10–3
  • 1 × 10–3
A bar of iron is 10 cm at 20oC. At 10oC, it will be (α of iron = 11 × 10–6/oC)
  • 11 × 10–6 cm longer
  • 11 × 10–6 cm shorter
  • 11 × 10–5 cm shorter
  • 11 × 10–5 cm longer
When a rod is heated but prevented from expanding, the stress developed is independent of
  • Material of the rod
  • Rise in temperature
  • Length of rod
  • None of the above
Expansion during heating
  • Occurs only in solids
  • Increase the weight of a material
  • Decreases the density of a material
  • Occurs at the same rate for all liquids and solids
On heating a liquid of coefficient of cubical expansion γ in a container having coefficient of linear expansion γ/3, the level of liquid in the container will
  • Rise
  • fall
  • Remain almost stationary
  • It is difficult to say
A pendulum clock keeps correct time at 0oC. Its mean coefficient of linear expansion is α /oC, then the loss in seconds per day by the clock if the temperature rises by toC is

  • Physics-Thermal Properties of Matter-91154.png
  • 2)
    Physics-Thermal Properties of Matter-91155.png

  • Physics-Thermal Properties of Matter-91156.png

  • Physics-Thermal Properties of Matter-91157.png
A litre of alcohol weighs
  • less in winter than in summer
  • Less in summer than in winter
  • Same both in summer and winter
  • None of the above
An ideal gas is expanding such that PT2 = Constant. The coefficient of volume expansion of the gas
  • 1/T
  • 2/T
  • 3/T
  • 4/T
Water has maximum density at
  • 0oC
  • 32oC
  • –4oC
  • 4oC
At some temperature T, a bronze pin is a large to fit into a hole drilled in a steel block. The change in temperature required for an exact fit is minimum when
  • Only the block is heated
  • Both block and pin are heated together
  • Both block and pin are cooled together
  • Only the pin is cooled
If the length of a cylinder on heating increases by 2%, the area of its base will increase by
  • 0.5%
  • 2%
  • 1%
  • 4%
The coefficient of superficial expansion of a solid is 2 × 10–5/oC. Its coefficient of linear expansion is
  • 4 × 10–5/oC
  • 3 × 10–5/oC
  • 2 × 10–5/oC
  • 1 × 10–5/oC
Coefficient of real expansion of mercury is 0.18 × 10–5/oC. If the density of mercury at 0oC is 13.6 g/cc, its density at 473 K is
  • 13.11 g/cc
  • 26.22 g/cc
  • 52.11 g/cc
  • None of these
A cylindrical metal rod of length Lo is shaped into a ring with a small gap as shown. On heating the system
Physics-Thermal Properties of Matter-91163.png
  • x decreases, r and d increases
  • x and r increases, d decreases
  • x, r and d all increase
  • Data insufficient to arrive at a conclusion
Two uniform brass rods A and B of length l and 2/ and radii 2r and r respectively are heated to the same temperature. The ratio of the increase in the volume of A to that of B is
  • 1 : 1
  • 1 : 2
  • 2 : 1
  • 1 : 4
A rod of sliver at 0oC is heated to 100oC. Its length is increased by 0.19 cm. Coefficient of cubical expansion of the silver rod is
  • 5.7 × 10–5/oC
  • 0.63 × 10–5/oC
  • 1.9 × 10–5/oC
  • 16.7 × 10–5/oC
A brass disc fits simply in a hole of a steel plate. The disc from the hole can be loosened if the system
  • First heated then cooled
  • First cooled then heated
  • Is heated
  • Is cooled
An iron bar length 10 m is heated from 0oC to 100oC. If the coefficient of linear thermal expansion of iron 10 × 10–6/oC, the increase in the length of bar is
  • 0.5 cm
  • 1.0 cm
  • 1.5 cm
  • 2.0 cm
Surface temperature of a lake is 2oC. Find the temperature of the bottom of the lake
  • 2oC
  • 3oC
  • 4oC
  • 1oC
Two rods, one of aluminium and the other made of steel, having initial length l1 and l2 are connected together to form a single rod of length l1 + l2. The coefficient of linear expansion for aluminium and steel are αa and αs respectively. The length of each rod increases by the same amount when their temperature are raised by toC, then the ratio of l1/(l1 + l2)

  • Physics-Thermal Properties of Matter-91167.png
  • 2)
    Physics-Thermal Properties of Matter-91168.png

  • Physics-Thermal Properties of Matter-91169.png

  • Physics-Thermal Properties of Matter-91170.png
Two solid spheres of the same material have the same radius but one is hollow while the other is solid. Both spheres are heated to same temperature. Then,
  • The solid sphere expands more
  • The hollow sphere expands more
  • Expansion is same for both
  • Nothing can be said about their relative expansion if their masses are not given
The coefficient of the volume expansion of a liquid is 49 × 10–5 K–1. Calculate the fractional change in its density when the temperature is raised by 30o
  • 7.5 × 10–2
  • 3.0 × 10–2
  • 1.5 × 10–2
  • 1.1 × 10–2
When vapour condense into liquid
  • It absorbs heat
  • It liberates heat
  • Its temperature increases
  • Its temperature decreases
At NTP water boils at 100oC. Deep down the mine, water will boil at a temperature
  • 100oC
  • >100oC
  • <100oC
  • Will not boil at all
A gas in an airtight container is heated from 25oC to 90oC. The density of the gas will
  • Increase slightly
  • Increase considerably
  • Remain the same
  • Decrease slightly
The factor not needed to calculate heat lost or gained when there is no change of state is
  • Weight
  • Specific heat
  • Relative density
  • temperature change
0:0:1


Answered Not Answered Not Visited Correct : 0 Incorrect : 0

Practice Physics Quiz Questions and Answers