(a) Cp+Cv=R (b) Cp – Cv=R (c) Cp /Cv=R (d) Cv+Cp=R Answer-b (11)
(in JK-1 mol-1) at constant volume is (R=8.3JK-1 mol-1 ) (a) 18.7 (b) 18.9 (c) 19.2 (d) None of the above Answer-a (6)
[γ=(5/3)] is mixed with one mole of diatomic gas [γ=(5/3)]. What is γ for the mixture? γ denotes the ratio of specific heat at constant pressure, to that at constant volume (a) 3/2 (b) 23/15 (c) 35/23 (d) 4/3 Answer-a …
(Cp) and at constant volume (Cv) which is correct (a) Cp of hydrogen gas is (5/2)R (b) Cv of hydrogen gas is (7/2)R (c) H2 has very small values of Cp and Cv (d) Cp – Cv = 1.99 cal/mole–K for …
(a) (3/2)R (b) (5/2)R (c) (7/2)R (d) 4R …
(a) 8475 J/kg K (b) 5186J/kg K (c) 1660 J/kg K (d) 10375 J/kg K Answer-d (43)
Cp-Cv=a . and for oxygen gas Cp-Cv=b . So the relation between a and b is given by (a) a=16b …
Cp/Cv is (a) 1.66 (b) 1.40 (c) 1.33 (d) 1.00 Answer-b (5)
(a) Cv=R/(γ-1) (b) Cp=Rγ/(γ-1) (c) Cp/Cv = γ …
Cp and Cv of the gas are respectively (a) Monoatomic, (5/2)R ,(3/2)R (b) Monoatomic, (7/2)R ,(5/2)R (c) Diatomic, (7/2)R ,(5/2)R (d) Triatomic, (7/2)R ,(5/2)R Answer-c (6)
(a) (3/2)R (b) (5/2)R (c) (7/2)R …
(a) Has only two values CP and Cv (b) Has a unique value at a given temperature (c) Can have any value between 0 and ∞ (d) Depends upon the mass of the gas Answer-c (17)
(a) At constant pressure work is done in expanding the gas (b) At constant volume work is done in expanding the gas (c) The molecular attraction increases more at constant pressure (d) The molecular vibration increases more at constant pressure …
γ=1.5. For this gas (a) Cv=(3R)/J (b) Cp=(3R)/J (c) Cv=(5R)/J …
Cv = 2.98 cal/mole/K. The mass of the argon atom is (a) 6.60×10-23 gm (b) 3.30×10-23 gm (c) 2.20×10-23 gm …
27°C to 227°C , its r.m.s. speed changed from 400 metre/sec to Vs .The is Vs (a) 516 metre/sec (b) 450 metre/sec (c) 310 metre/sec (d) 746 metre/sec Answer-a (5)
Cv for a monoatomic gas is (a) (3/2)R (b) (5/2)R (c) 3R …
(a) Cp-Cv =R/J (b) Cv-Cp =R/J (c) Cp-Cv =J (d) Cv-Cp =J …
(a) 3/2 (b) 5/2 (c) 5/3 …
(a) Same and 3 cal/mole/°C approximately (b) Exactly equal and its value is 4 cal/mole/°C (c) Will be totally different (d) Approximately equal and its value is 5 cal/mole/°C Answer-d (3)
(a) Cp=(5/2)R (b) Cv=(3/2)R (c) Cp-Cv=2R (d) Cp=(7/2)R Answer-d (10)
R/Cv=0.67 . This gas is made up of molecules which are (a) Diatomic (b) Mixture of diatomic and polyatomic molecules (c) Monoatomic (d) Polyatomic Answer-c (5)
The Cp/Cv is (a) 1.67 (b) 1.4 (c) 1.29 (d) 1.33 Answer-d (8)
Cp/Cv is given by (a) (2/f)+1 (b) 1-(2/f) (c) 1+(1+f) …
(a) 2 (b) 3 (c) 5 (d) 1 Answer-a (4)
(a) 3 (b) 4 (c) 5 (d) 6 Answer-c (6)
(a) Three degrees of freedom (b) Four degrees of freedom (c) Five degrees of freedom (d) Six degrees of freedom Answer-a (10)
SO2 (molecular mass 64) is (a) He (molecular mass 4) (b) O2 (molecular mass 32) (c) H2 (molecular mass 2) (d) CH4 (molecular mass 16) Answer-a (4)
O2 and H2 molecules is placed in a large evacuated chamber. The entire system is maintained at constant temperature T. The ratio of Vrms of O2 molecules to that of the Vrms of H2 molecules, found in the chamber outside the …
(a) 800 K (b) 1600 K (c) 1200 K (d) None of these Answer-b (4)
(a) 819°C (b) 719°C (c) 909°C (d) None of these Answer-a (4)
105 Pa and 0°C temperature is 0.5 km sec-1 If the pressure is kept constant but temperature is raised to 819°C, the velocity will become (a) 1.5 kms–1 (b) 2 kms–1 (c) 5 kms–1 …
(a) Collision on walls will be less (b) Number of collisions per unit time will increase (c) Collisions will be in straight lines (d) Collisions will not change Answer-b (6)
(a) Is decreased (b) Is increased (c) Remains unchanged (d) Increases or decreases according to the nature of the gas Answer-b (2)