Warming ammonium chloride with sodium hydroxide in a test tube is an example of:

1. closed system

2. Isolated system

3. open system

4. None of these

 

Subtopic:  Classification of System, Extensive & Intensive Properties |
 70%
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints

The reaction CH4(g) + Cl2(g)CH3Cl(g) + HCl(g)

has H=-25 Kcal

Bond Bond Energy Kcal
EC-Cl 84
EH-Cl 103
EC-H X
ECl-Cl Y
X:Y 9:5


From the given data, what is the bond enthalpy of Cl-Cl bond?

1. 70 Kcal 

2.  80 Kcal

3.  67.75 Kcal

4. 57.85 Kcal

Subtopic:  Enthalpy & Internal energy |
 51%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Entropy decreases in which of the following reactions?

1. Boiling of egg

2. Combustion of benzene at 127°C

3. Stretching of rubber band

4. Dissolution of sugar in water

Subtopic:  Spontaneity & Entropy |
 58%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Heat of the neutralization is greater than 13.7 kcal in -

1. HF & NH4OH             

2. HCl & NaOH

3. HI & KOH                   

4. HF & NaOH

Subtopic:  Thermochemistry |
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints

Consider the reaction

N2(g) + 3H2(g)2NH3(g) carried out at constant temperature and pressure. If H and E are enthalpy change and internal energy change respectively, which of the following expression is True?

1.  HE                        2. H=E3.  H<E                       4. H>E

Subtopic:  Enthalpy & Internal energy |
 68%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Work done is maximum in -

1. Isobaric work           

2. Isothermal work

3. Isochoric work         

4. Adiabatic work

Subtopic:  Thermodynamics' Properties and process |
 54%
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints

For exothermic reaction to be spontaneous (S=negative) temperature must be -

1. High 2. Zero
3. Constant 4. Low
Subtopic:  Spontaneity & Entropy |
 66%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Which of the following conditions should be satisfied for the given reaction to be spontaneous at 0°C and 1 atm?

H2O(s) H2O(l)

(1) H=G

(2) H<T.S

(3) H>T.S

(4) H=T.S

Subtopic:  Spontaneity & Entropy |
 64%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

'The free energy change due to a reaction is zero when-

1. The reactants are initially mixed.

2.  A catalyst is added

3. The system is at equilibrium

4. The reactants are completely consumed

Subtopic:  Gibbs Energy Change |
 88%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

An ideal gas expands at a constant external pressure of 2.0 atmosphere by 20 litre and absorbs 10kJ of heat from surrounding. What is the change in internal energy of the system:-

(1) 4052 J

(2) 5948 J

(3) 14052 J

(4) 9940 J

Subtopic:  First Law of Thermodynamics |
 52%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh