JEE Questions for Physics Thermal Properties Of Matter Quiz 4 - MCQExams.com

A gas in container A is thermal equilibrium with another gas of the same mass in container B. If we denote the corresponding pressures and volumes by the suffixes A and B then which of the following statements is most likely to be true
  • PA = PB, VA ≠ VB
  • PA ≠ PB, VA = VB
  • PA / VB= PB / VB
  • PA VA = PB VB
The critical volume of a gas obeying Vander Waal’s equation is

  • Physics-Thermal Properties of Matter-90828.png
  • 2)
    Physics-Thermal Properties of Matter-90829.png
  • 3 b

  • Physics-Thermal Properties of Matter-90830.png
The expansion of a mass m of an ideal gas at a constant pressure P is shown by the line H. The expansion of a mass 2 m of the same gas at pressure P/2 is shown by :
Physics-Thermal Properties of Matter-90831.png
  • line F
  • line G
  • line H
  • line I
If ‘S’ is stress and ‘Y’ is Young’s modulus of material of a wire, then the energy stored in the wire per unit volume is

  • Physics-Thermal Properties of Matter-90832.png
  • 2)
    Physics-Thermal Properties of Matter-90833.png

  • Physics-Thermal Properties of Matter-90834.png

  • Physics-Thermal Properties of Matter-90835.png
Small liquid drops assume spherical shape because
  • atmospheric pressure exerts a force on a liquid drop
  • volume of a spherical drop is minimum
  • gravitational force acts upon the drop
  • liquid tends to have the minimum surface area due to surface tension.
A vessel contains a mixture of one mole of oxygen and two moles of nitrogen at 300K. The ratio of the average rotational kinetic energy per O2 molecule to the per N2 molecule is
  • 1 : 1
  • 1 : 2
  • 2 : 1
  • depends upon the moment of inertia of two molecules
A water film is formed between two straight parallel wires of 10 cm length 0.5cm apart. If the distance between two wires is increased by 1 mm. What will be the work done? (Surface tension of water = 72 dyne/cm)
  • 72erg
  • 144 erg
  • 288 erg
  • 36 erg
The average translational kinetic energy of at a particular temperatureis 0.048 eV. The average translational kinetic energy of N2 molecules in eV at the same temperature is
  • 0.0015
  • 0.0030
  • 0.048
  • 0.768.
The load versus elongation graph for four wires of the same materials is shown in the Fig. The thinnest wire is represented by the line
Physics-Thermal Properties of Matter-90837.png
  • OC
  • OD
  • OA
  • OB
A U-tube is partially filled with water. Oil which does not mix with water is next poured into one side, until water rises by 25 cm on the other side. If the density of the oil is 0.8 g/cc, the oil level will stand higher than the water level by
  • 6.25 cm
  • 12.50 cm
  • 18.75 cm
  • 25.00 cm
Two soap bubbles of radii r1 and r2 equal to 4 cm and 5 cm respectively are touching each other over a common surface AB (shown in Fig). Its radius will be
Physics-Thermal Properties of Matter-90838.png
  • 4 cm
  • 4.5 cm
  • 5 cm
  • 20 cm
A wire suspended vertically from one of its ends is stretched by attaching a weight of 200 N to the lower end. The weight stretches the wire by 1 mm. Then elastic energy stored in the wire is
  • 20 J
  • 0.1 J
  • 0.2 J
  • 10 J
When a body falls in air, the resistance of air depends to a greater extent on the shape of the body. Three different shapes are given Fig. Identify the combination of air resistances which truely represents the physical situation. (The cross-sectional areas are the same).
Physics-Thermal Properties of Matter-90841.png
  • 1 < 2 < 3
  • 2 < 3 < 1
  • 3 < 2 < 1
  • 3 < 1 < 2
A bird is sitting in a large closed cage which is placed on a spring balance. It records a weight of 5 N. The bird of mass 0.5 kg flies upward in the cage with an acceleration of 2m/s2 . The spring balance will now record a weight of
  • 4 N
  • 5 N
  • 6 N
  • 7 N
A steel ball of mass 0.1 kg falls freely from a height of 10 m and bounces to a height of 5.4 m from the ground. If the dissipated energy in this process is absorbed by the ball, the rise in its temperature is (Specific heat of steel = 460 J kg–1 C–1\'g = 10 ms2–)
  • 0.01°C
  • 0.1°C
  • 1°C
  • 1.1°C
Water falls from a height 500 m. What is the rise in temperature of water at bottom if whole energy remains in the water?
  • 0.96°C
  • 1.02°C
  • 1.16°C
  • 0.23°C
A faulty thermometer has its lower fixed point marked as –10°C and upper fixed point marked as 110°. If the temperature of the body shown in this scale is 62°, the temperature shown on the Celsius scale is
  • 72° C
  • 82° C
  • 60° C
  • 42° C
On the celsius scale the absolute zero of temperature is at
  • 0°C
  • –32°C
  • 100°C
  • –273.15°C
Oxygen boils at –183°C. This temperature is approximately
  • 215°F
  • –297°F
  • 329°F
  • 361°F
Recently, the phenomenon of superconductivity has been observed at 95 K. This temperature is nearly equal to
  • –288°F
  • –146°F
  • –368°F
  • +178°F
The temperature of a substance increases by 27°C. On the Kelvin scale this increase is equal to
  • 300 K
  • 2.46 K
  • 27 K
  • 7 K
Thermoelectric thermometer is based on
  • Photoelectric effect
  • Seebeck effect
  • Compton effect
  • Joule effect
Maximum density of H2O is at the temperature
  • 32oF
  • 39.2oF
  • 42oF
  • 4oF
The study of physical phenomenon at low temperatures (below liquid nitrogen temperature ) is called
  • Refrigeration
  • Radiation
  • Cryogenics
  • Pyrometry
The absolute zero is the temperature at which
  • Water freezes
  • All substances exist in solid state
  • Molecular motion ceases
  • None of the above
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 freezes
  • Volume and pressure of a gas becomes zero
  • None of the above
On which of the following scales of temperature, the temperature is never negative
  • Celsius
  • Fahrenheit
  • Reaumur
  • Kelvin
The temperature on Celsius scale is 25°C. What is the corresponding temperature on the Fahrenheit scale
  • 40°F
  • 77°F
  • 50°F
  • 45°F
At what temperature the centigrade (Celsius) and Fahrenheit, readings are the same ?
  • – 40o
  • +40o
  • 36.6o
  • –37o
Standardisation of thermometers is obtained with
  • Jolly's thermometer
  • Platinum resistance thermometer
  • Thermocouple thermometer
  • Gas thermometer
The gas thermometers are more sensitive than liquid thermometers because
  • Gases expand more than liquids
  • Gases are easily obtained
  • Gases are much lighter
  • Gases do not easily change their states
Mercury thermometers can be used to measure temperatures upto
  • 100°C
  • 212°C
  • 360°C
  • 500°C
The absolute zero temperature in Fahrenheit scale is
  • –273°F
  • –32°F
  • –460°F
  • –132°F
A constant pressure air thermometer gave a reading of 47.5 units of volume when immersed in ice cold water, and 67 units in a boiling liquids. The boiling point of the liquid will be
  • 135°C
  • 125°C
  • 112°C
  • 100°C
On a new scale of temperature (which is linear) and called the W scale, the freezing and boiling points of water are 39° W and 239° W respectively. What will be the temperature on the new scale, corresponding to a temperature of 39° C on the Celsius scale
  • 200° W
  • 139° W
  • 78° W
  • 117° W
Of the following thermometers, the one which can be used for measuring a rapidly changing temperature is a
  • Thermocouple thermometer
  • Gas thermometer
  • Maximum resistance thermometer
  • Vapour pressure thermometer
The correct value of 0°C on Kelvin scale will be
  • 273.15 K
  • 273.00 K
  • 273.05 K
  • 273.63 K
A bar of iron is 10 cm at 20°C. At 19°C it will be (α of iron = 11 × 10–6/° C)
  • 11 × 10–6 cm longer
  • 11 × 10–6 shorter
  • 11 × 10–5 shorter
  • 11 × 10–5 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
  • Increases 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 X in a container having coefficient of linear expansion y/3, the level of liquid in the container will
  • Rise
  • Fall
  • Will remain almost stationary
  • It is difficult to say
A solid ball of metal has a concentric spherical cavity within it. If the ball is heated, the volume of the cavity will
  • Increase
  • Decrease
  • Remain unaffected
  • None of these
If the length of a cylinder on heating increases by 2%, the area of its base will increase by
  • 0.5%
  • 2%
  • 1%
  • 4%
Density of substance at 0°C is 10 gm/cc and at 100°C, its density is 9.7 gm/cc. The coefficient of linear expansion of the substance will be
  • 102
  • 10–2
  • 10–3
  • 10–4
Ratio among linear expansion coefficient (α) areal expansion coefficient (β) and volume expansion coefficient (γ) is
  • 1 : 2 : 3
  • 3 : 2 : 1
  • 4 : 3 : 2
  • None of these
When vapour condenses into liquid
  • It absorbs heat
  • It liberates heat
  • Its temperature increases
  • Its temperature decreases
At NTP water boils at 100°C. Deep down the mine, water will boil at a temperature
  • 100°C
  • > 100°C
  • < 100°C
  • Will not boil at all
Water is used to cool radiators of engines, because
  • Of its lower density
  • It is easily available
  • It is cheap
  • It has high specific heat
Melting point of ice
  • Increases with increasing pressure
  • Decreases with increasing pressure
  • Is independent of pressure
  • Is proportional to pressure
0:0:1


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