Question 2 :
Thermodynamics mainly deals with<br>Note: Two or more options may be correct.
Question 3 :
Assertion: Thermodynamics process in nature are irreversible.
Reason: Dissipative effects cannot be eliminated
Question 4 :
Temperatures of two hot bodies $B_{1}$ and $B_{2}$ are $100^{\circ}C$ and $80^{\circ}C$ respectively. The temperature of surrounding is $40^{\circ}C$. At $t = 0$, the ratio of rates of cooling of the two bodies (liquid) $R_{1} : R_{2}$ will be:
Question 5 :
The temperature at the bottom of a high water fall is higher than that at the top because
Question 7 :
The following two equilibria exist simultaneously in a closed vessel :<br/>$PCI_5(g) \rightleftharpoons PCI_3(g) + Cl_2(g)$<br/>$COCI_2(g) \rightleftharpoons CO (g) + CI_2 (g)$<br/>If some CO is added into the vessel, then after the equlibrium is attained again, concertration of ?
Question 8 :
$C_v$ for ammonia gas is $(in J \ mol^{-1} \ K^{-1})$
Question 10 :
$C_v$ for helium gas $(He)$ is $(in J \ mol^{-1} \ K^{-1})$
Question 12 :
When the system is said to be in a state of thermodynamic equilibrium?
Question 14 :
Which one of the following systems is an example of a closed system?
Question 15 :
Assertion: The presence of reactants in the closed vessel made of conducting material is an example of a closed system.
Reason: In a closed system, there is no exchange of matter but exchange of energy is possible between the system and the surroundings.
Question 18 :
A reaction that occurs only when heat is added is best described as:
Question 19 :
For the gas phase exothermic reaction, $A_2+B_2 \rightleftharpoons C_2$, carried out in a closed vessel, the equilibrium moles of $A_2$, can be increased by : 
Question 20 :
Magnitude of Seebeck emf between the junctions does not depend on
Question 21 :
The value closest to the thermal velocity of a Helium atom at room temperature (300 K) in $ms^{-1}$ is : [$k_B = 1.4 \times 10^{-23} \ J/K ; \ m_{He} = 7\times 10^{-27} \ kg$ ]
Question 22 :
Under which of the following conditions is the relation,<br/>$\triangle H=\triangle U+P\triangle V$ valid for a closed system?
Question 23 :
The state of gas can be described by quoting the relationship between_____________.<br>
Question 24 :
Assertion: Diamond is thermodynamically less stable than its allotrope graphite.
Reason: Molar entropy of graphite is greater than that of diamond under similar conditions.
Question 25 :
Which of the following parameters does not charaterize the thermodynamic state of matter?
Question 27 :
Assertion: Water drops take spherical shape when falling freely.
Reason: Water has minimum surface tension among all liquids.
Question 28 :
Conversion of sulphur to $SO_3$ has $\triangle H=2xK cal$ and conversion of $SO_2$ to $SO_3$ involves $\triangle H=-ykcal$. The correct thermochemical equation for formation of $SO_2$ is:
Question 29 :
Assertion: We feel cold on touching the ice.
Reason: Ice is a solid form of water.
Question 31 :
In a laboratory, liquid in a thermally insulated container is stirred for one hour by a mechanical linkage to a stirrer, for this process:
Question 34 :
In an evacuated closed isolated chamber at ${250}^{o}C$. $.02$ mole $P{Cl}_{5}$ and $.01$ mole ${Cl}_{2}$ are mixed $(P{Cl}_{5}\rightleftharpoons P{Cl}_{3}+{Cl}_{2})$. At equilibrium density of mixture was $2.49g/L$ and pressure was $1$ atm. The number of total moles at equilibrium will be approximately:
