PYQSide ExamsMy practice

Kinetic Theory · Question 21

AIPMT 2015MCQMedium📈 Topic in 12% papers+4−1
1

4.0 g of a gas occupies 22.4 litres at NTP. The specific heat capacity of the gas at constant volume is 5.0 J K-1 mol-1. If the speed of sound in this gas at NTP is 952 m s-1, then the heat capacity at constant pressure is (Take gas constant R = 8.3 J K-1 mol-1)

  1. 7.0 J K-1 mol-1
  2. 8.5 J K-1 mol-1
  3. 8.0 J K-1 mol-1
  4. 7.5 J K-1 mol-1

Answer

(3) 8.0 J K-1 mol-1

Solution

22.4 L at NTP is 1 mol M = 4.0 g mol-1 = 4 10-3 kg mol-1

v = RTM = v2MRT

= (952)2 4 10-38.3 273

= 3625.22265.9 1.6

Cp = Cv = 1.6 5.0 = 8.0 J K-1 mol-1

Answer: (3)

AIPMT 2015

Keep practising — Kinetic Theory

2

The ratio of the specific heats CpCv = in terms of degrees of freedom (n) is given by

  1. (1 + 2n )
  2. (1 + n2 )
  3. (1 + 1n )
  4. (1 + n3 )
AIPMT 2015 (Cancelled)
3

The mean free path of molecules of a gas, (radius r) is inversely proportional to

  1. r3
  2. r2
  3. r
  4. r
AIPMT 2014
4

In the given (V - T) diagram, what is the relation between pressure P1 and P2? [figure]

  1. P2 < P1
  2. Cannot be predicted
  3. P2 = P1
  4. P2 > P1
NEET 2013
5

The amount of heat energy required to raise the temperature of 1 g of Helium at NTP, from T1 K to T2 K is

  1. 34Na kB (T2 - T1)
  2. 34Na kB ( T2T1 )
  3. 38Na kB (T2 - T1)
  4. 32Na kB (T2 - T1)
NEET 2013
6

In a vessel, the gas is at pressure P. If the mass of all the molecules is halved and their speed is doubled, then the resultant pressure will be

  1. 2P
  2. P
  3. P/2
  4. 4P
NEET 2013 (Karnataka)
7

At 10 the value of the density of a fixed mass of an ideal gas divided by its pressure is x. At 110 this ratio is

  1. 10110x
  2. 283383x
  3. x
  4. 383283x
AIPMT 2008
8

The equation of state for 5 g of oxygen at a pressure P and temperature T, when occupying a volume V, will be (where R is the gas constant)

  1. PV = (5/32)RT
  2. PV = 5RT
  3. PV = (5/2)RT
  4. PV = (5/16)RT
AIPMT 2004
9

To find out degrees of freedom, the expression is

  1. f = 2 - 1
  2. f = + 12
  3. f = 2 + 1
  4. f = 1 + 1
AIPMT 2000

All Kinetic Theory PYQs →

PDFDownload Kinetic Theory PYQs as PDF Free, with answer key and a QR code to every solution — print it or study offline⬇
All NEET Physics chapters
Class 11Units and MeasurementsMotion in a Straight LineMotion in a PlaneLaws of MotionWork, Energy and PowerSystem of Particles and Rotational MotionGravitationMechanical Properties of SolidsMechanical Properties of FluidsThermal Properties of MatterThermodynamics (Physics)Kinetic TheoryOscillationsWaves
Class 12Electric Charges and FieldsElectrostatic Potential and CapacitanceCurrent ElectricityMoving Charges and MagnetismMagnetism and MatterElectromagnetic InductionAlternating CurrentElectromagnetic WavesRay Optics and Optical InstrumentsWave OpticsDual Nature of Radiation and MatterAtomsNucleiSemiconductor ElectronicsExperimental Skills (Physics)