Thermal Properties Of Matter CBSE Questions & Answers

Thermal Properties Of Matter

This is Physics Class 11 Thermal Properties of Matter CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
Heat is a form of
  • A
    solid
  • B
    energy
    Correct
  • C
    liquid
  • D
    gas
2
Heat flows from one body to another if
  • A
    there is no difference of temperature
  • B
    there is a difference of temperatures
    Correct
  • C
    there is a difference of material
  • D
    there is a difference of density
3
The ice and steam point have values 32 \(^\circ \)F and 212 \(^\circ \)F respectively, on the Fahrenheit scale. Corresponding values on the Centigrade scale are
  • A
    5 \(^\circ \)C and 102 \(^\circ \)C
  • B
    10 \(^\circ \)C and 112 \(^\circ \)C
  • C
    0 \(^\circ \)C and 100 \(^\circ \)C
    Correct
  • D
    -5 \(^\circ \)C and 95 \(^\circ \)C
4
180 equal intervals between two reference points on Fahrenheit scale correspond to
  • A
    100 equal intervals on Celsius scale
    Correct
  • B
    90 equal intervals on Celsius scale
  • C
    110 equal intervals on Celsius scale
  • D
    50 equal intervals on Celsius scale
5
The correct equation for converting between Fahrenheit temperature \({{\rm{t}}_{\rm{F}}}\) and Celsius temperature \({{\text{t}}_{\text{C}}}\) is
  • A
    \({{{t_F} - 32} \over {180}} = {{{t_C}} \over {120}}\)
  • B
    \({{{t_F} + 32} \over {180}} = {{{t_C}} \over {100}}\)
  • C
    \({{{t_F} - 32} \over {180}} = {{{t_C}} \over {100}}\)
    Correct
  • D
    \({{{t_F} - 32} \over {160}} = {{{t_C}} \over {100}}\)
6
If P is the pressure, \(\mu \) is the number of moles in the sample, T the temperature and V the volume of gas, ideal-gas equation is
  • A
    PV = \(\mu \)RT
    Correct
  • B
    PV = RT
  • C
    PV = \(\mu \)R/T
  • D
    PV = \(\mu \)T
7
Plots of pressure as a function of temperature for gas thermometers containing different types and quantities of gas converge to the same point when extrapolated to zero pressure. The temperature value to which converge is.
  • A
    232.15\(^\circ \)C
  • B
    -273.15\(^\circ \)C
    Correct
  • C
    -212.00\(^\circ \)C
  • D
    32.15\(^\circ \)C
8
Relation between Kelvin (T) and Celsius scales (\({{\rm{t}}_{\rm{C}}}\)) is
  • A
    T = \({{\rm{t}}_{\rm{C}}}\) + 212.15
  • B
    T = \({{\rm{t}}_{\rm{C}}}\) + 180.15
  • C
    T = \({{\rm{t}}_{\rm{C}}}\) + 273.15
    Correct
  • D
    T = \({{\rm{t}}_{\rm{C}}}\) + 32.15
9
If the substance is in the form of a long rod, then for small change in temperature, \(\Delta {\rm{T}}\), the fractional change in length, Δl/l, is
  • A
    directly proportional to \(\Delta {\rm{T}}\)
    Correct
  • B
    inversely proportional to log \(\Delta {\rm{T}}\)
  • C
    directly proportional to log \(\Delta {\rm{T}}\)
  • D
    inversely proportional to \(\Delta {\rm{T}}\)
10
compared to glass copper expands
  • A
    three times less
  • B
    two times less
  • C
    five times more
    Correct
  • D
    about the same
11
If V is the initial volume, \(\Delta {\rm{V}}\) the fractional change in volume of a substance for temperature change \(\Delta {\rm{T}}\), the coefficient of volume expansion, \({\alpha _{\rm{V}}}\) is defined as
  • A
    \({\alpha _V} = \left( {{{V} \over V}} \right){1 \over {T}}\)
    Correct
  • B
    \({\alpha _V} = \left( {{{V} \over {2V}}} \right){1 \over {T}}\)
  • C
    \({\alpha _V} = \left( {{{V} \over V}} \right){1 \over {2T}}\)
  • D
    \({\alpha _V} = \left( {{{2V} \over V}} \right){1 \over {T}}\)
12
Which of these materials has low coefficient of volume expansion \({\alpha _{\rm{V}}}\) ?
  • A
    paraffin
  • B
    alcohol
  • C
    water
  • D
    pyrex glass
    Correct
13
Which of these materials have high coefficients of volume expansion \({\alpha _{\rm{V}}}\)?
  • A
    Pyrex glass
  • B
    invar
  • C
    alcohol
    Correct
  • D
    glass
14
expansion of water is called anomalous because
  • A
    it expands on heating from 0 \(^\circ \)C to 4 \(^\circ \)C
  • B
    it contracts on heating from 0 \(^\circ \)C to 4 \(^\circ \)C
    Correct
  • C
    it contracts on cooling from 4 \(^\circ \)C to 0 \(^\circ \)C
  • D
    it expands on cooling from 10 \(^\circ \)C to 4 \(^\circ \)C
15
Animal and plant life in lakes and ponds are not destroyed because
  • A
    water expands on heating at all temperatures
  • B
    freezing takes place at the top first and bottom layers are not frozen as temperature in bottom layers is more than zero
    Correct
  • C
    water contracts on cooling at all temperatures
  • D
    freezing takes place at the bottom first