Chemical Thermodynamics-First Law of Thermodynamics [NEET (2024 Updated)-National Eligibility cum Entrance Test (Medical) Chemistry]: Questions 1 - 7 of 73
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Question 1
Question MCQ▾
When 50 g of iron is dissolved in HCl at 25°C in an open vessel and atmospheric pressure is 1 atm, calculate the work done?
Choices
Choice (4) | Response | |
---|---|---|
a. | -22.123 J | |
b. | -21.84 J | |
c. | 22.123 J | |
d. | -2212.39 J |
Question 2
Question MCQ▾
Heat of formation of 2 moles of NH3 (G) is -90 KJ , bond energies of H-H and N-H bonds are 435 KJ and 390 KJ/mol. The value of the bond energy?
Choices
Choice (4) | Response | |
---|---|---|
a. | -472.5 KJ | |
b. | 945 KJ | |
c. | -945 KJ | |
d. | 472.5 KJ |
Question 3
Question MCQ▾
A gas expands, isothermally and irreversibly the work done by gas is?
Choices
Choice (4) | Response | |
---|---|---|
a. | Maximum | |
b. | Minimum | |
c. | Average | |
d. | Zero |
Question 4
Question MCQ▾
Bomb calorimeter proceeds at constant?
Choices
Choice (4) | Response | |
---|---|---|
a. | Weight | |
b. | Volume | |
c. | Pressure | |
d. | Temperature |
Question 5
Question MCQ▾
One mole of a gas is heated at constant pressure to raise its temperature by 1°C. The work done in joules is?
Choices
Choice (4) | Response | |
---|---|---|
a. | -16.62 | |
b. | - 4.3 | |
c. | 19.4 | |
d. | - 8.314 |
Question 6
Question MCQ▾
Determine the heat of transformation of C (diamond) ⇾ C (graphite) ?
Choices
Choice (4) | Response | |
---|---|---|
a. | 0.5 kcal | |
b. | 5.0 kcal | |
c. | -0.5 kcal | |
d. | -5.0 kcal |
Question 7
Question MCQ▾
The compounds which have negative enthalpies of formation are known as
Choices
Choice (4) | Response | |
---|---|---|
a. | endothermic compounds | |
b. | exothermic compounds | |
c. | allotropic compounds | |
d. | isothermal compounds |