For a reaction at equilibrium-

1. $∆G=∆{G}^{\circ }=0$

2.

3.

4. $∆G=∆{G}^{\circ }\ne 0$

Concept Questions :-

Gibbs Energy Change
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

Using only the following data:

(I)

(II)

the $∆{H}^{\circ }$ value, in kilojoules, for the reaction

$F{e}_{2}{O}_{3}\left(s\right)+CO\left(g\right)\to 2FeO\left(s\right)+C{O}_{2}\left(g\right)$ is calculated to be:

1. -43.3

2. -10.3

3. +6.2

4. +10.3

Concept Questions :-

Enthalpy and It's Type
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

82 litres of carbon dioxide are produced at a pressure of 1 atm by the action of acid on a metal carbonate. The work done by the gas (in calories) in pushing back the atmosphere is (R = 0.082 litre-atm deg-1mol-1)

1. 1000

2. 820

3. 1640

4. 2000

Concept Questions :-

First Law of Thermodynamics
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

Among the following, the reaction for which $∆H=∆E$ is-

1. $PC{l}_{5}\left(g\right)\to PC{l}_{3}\left(g\right)+C{l}_{2}\left(g\right)$

2. ${H}_{2}\left(g\right)+C{l}_{2}\left(g\right)\to 2HCl\left(g\right)$

3. ${C}_{2}{H}_{5}OH\left(l\right)+3{O}_{2}\left(g\right)\to 2C{O}_{2}\left(g\right)+3{H}_{2}O\left(l\right)$

4. ${C}_{2}{H}_{4}\left(g\right)+{H}_{2}\left(g\right)\to {C}_{2}{H}_{6}\left(g\right)$

Concept Questions :-

First Law of Thermodynamics
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

For which change $∆H\ne ∆E$

1. ${H}_{2}+{I}_{2}⇌2HI$

2. $HCl+NaOH\to NaCl+{H}_{2}O$

3. $C\left(s\right)+{O}_{2}\left(g\right)⇌C{O}_{2}\left(g\right)$

4. ${N}_{2}+3{H}_{2}\to 2N{H}_{3}$

Concept Questions :-

Enthalpy and It's Type
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

Enthalpy change when 1.00 g water is frozen at ${0}^{\circ }C,$ is :

1. 0.0797 kcal

2. -0.0797 kcal

3. 1.435 kcal

4. -1.435 kcal

Concept Questions :-

Enthalpy and It's Type
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

One mole of hydrogen gas at ${25}^{\circ }C$ and 1 atm pressure is heated at constant pressure until its volume has doubled. Given that ${C}_{v}$ for hydrogen is 3.0 cal deg-1 mol-1, the and $∆E$ for this process are-

1. = 1490 cal and $∆E$ = 894 cal

2. $∆E$= 1490 cal

3. = 894 cal and $∆E$= 1490 cal

4. $∆E$= 894 cal

Concept Questions :-

CP and CV and Relation for Real Gas
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

The enthalpy change of the reaction

$A{l}_{2}C{l}_{6}\left(s\right)+6Na\left(s\right)\to 2Al\left(s\right)+6NaCl\left(s\right)$ is -257 kcal.

Given the heat of formation of NaCl(s) is 98.0 kcal, the heat of formation of $A{l}_{2}C{l}_{6}\left(s\right)$ is-

1. 158 kcal

2. -331 kcal

3. -166 kcal

4. 316 kcal

Concept Questions :-

Thermochemistry
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

Some of the thermodynamic parameters are state variables while some are process variables. Some grouping of the parameters are given. Choose the correct one-

1. State variables : Temperature, No. of moles

Process variables : Internal energy, work done by the gas

2. State variables : Volume, Temperature

Process variables : Internal energy, work done by the gas

3. State variables : work done by the gas, heat rejected by the gas.

Process variables : Temperature, volume

4. State variables : Internal energy, volume

Process variables : Work done by the gas, heat absorbed by the gas

High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

One mole of a real gas is subjected to heating at constant volume from state to  state. Then it is subjected to irreversible adiabatic compression against constant external pressure of P3 atm till syatem reaches the final state. If the constant volume molar heat capacity of real gas is CV. Find out correct expression for $∆H$ from state 1 to state 3-

1. ${C}_{v}\left({T}_{3}-{T}_{1}\right)+\left({P}_{3}{V}_{1}-{P}_{1}{V}_{1}\right)$

2. ${C}_{v}\left({T}_{2}-{T}_{1}\right)+\left({P}_{3}{V}_{2}-{P}_{1}{V}_{1}\right)$

3. ${C}_{v}\left({T}_{2}-{T}_{1}\right)+\left({P}_{3}{V}_{1}-{P}_{1}{V}_{1}\right)$

4. ${C}_{p}\left({T}_{2}-{T}_{1}\right)+\left({P}_{3}{V}_{1}-{P}_{1}{V}_{1}\right)$

Concept Questions :-

CP and CV and Relation for Real Gas