In an isobaric process, the ratio of heat supplied to the system (dQ) and work done by the system (dW) for diatomic gas is [AFMC 2002]

(1) 1 : 1

(2) 7 : 2

(3) 7 : 5

(4) 5 : 7

Subtopic:  Cp & Cv |
 55%
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NEET 2023 - Target Batch - Aryan Raj Singh
Hints

If for a given substance melting point is TB and freezing point is TA, then correct variation shown by graph between entropy change and temperature is [DCE 2001]

(1)

(2)

(3)

(4)

Subtopic:  Spontaneity & Entropy |
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh
Hints

The amount of heat measured for a reaction in a bomb calorimeter is

1. ΔG

2. ΔH

3. ΔE

4. PΔV

Subtopic:  Thermodynamics' Properties and process |
 51%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

A Beckmann thermometer is used to measure -

1. High temperature

2. Low temperature

3. Normal temperature

4. All temperatures

Subtopic:  Thermodynamics' Properties and process |
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NEET 2023 - Target Batch - Aryan Raj Singh
Hints

The heat liberated when 1.89 g of benzoic acid is burnt in a bomb calorimeter at 25°C increases the temperature of 18.94 kg of water by 0.632°C. If the specific heat of water at 25°C is 0.998 cal/g-deg, the value of the heat combustion of benzoic acid is

(1) 771.1 kcal

(2) 871.2 kcal

(3) 881.1 kcal

(4) 981.1 kcal

Subtopic:  Enthalpy & Internal energy |
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NEET 2023 - Target Batch - Aryan Raj Singh
Hints

The enthalpy of neutralization of HCN by NaOH is –12.13 kJ mol–1. The enthalpy of ionisation of HCN will be -

1. 45.07 kJ

2. 4.310 kJ

3. 451.9 kJ

4. 33.77 kJ

Subtopic:  Hess's Law |
 69%
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NEET 2023 - Target Batch - Aryan Raj Singh
Hints

In thermodynamics, a process is called reversible when

1. Surroundings and system change into each other

2. There is no boundary between the system and the surroundings

3. The surroundings are always in equilibrium with the system

4. The system changes into the surroundings spontaneously

Subtopic:  Thermodynamics' Properties and process |
 72%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh
Hints

C(graphite)+O2(g)CO2(g); ΔH=94.05kcalmol1

C(diamond)+O2(g)CO2(g); ΔH=94.50kcalmol1

which of the following is correct?

(1) C(graphite)C(diamond); ΔH298Ko=450calmol1

(2) C(diamond)C(graphite); ΔH298Ko=+450calmol1

(3) Graphite is the stabler allotrope

(4) Diamond and graphite both are sp2 hybridised

Subtopic:  Enthalpy & Internal energy |
 70%
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NEET 2023 - Target Batch - Aryan Raj Singh
Hints

Which of the following is not a correct statement? [ (Engg.) 2002]

1. When ΔG is negative, the process is spontaneous

2. When ΔG is zero, the process is in a state of equilibrium

3. When ΔG is positive, the process is non-spontaneous

4. None of these

Subtopic:  Gibbs Energy Change |
 85%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh
Hints

When a gas undergoes adiabatic expansion, it gets cooled due to -

1. Loss of energy

2. Fall in pressure

3. Decrease in velocity

4. Increase in energy with work done

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