NEET Questions - Chemistry - Chemical Thermodynamics

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The temperature of the system decreases in an

Adiabatic compression
Isothermal compression
Isothermal expansion
Adiabatic expansion

If a refrigerator’s door is opened, then we get

Room heated
Room cooled
More amount of heat is passed out
No effect on room

The cooling in refrigerator is due to

Reaction of the refrigerator gas
Expansion of ice
The expansion of the gas in the refrigerator
The work of the compressor

The process, in which no heat enters or leaves the system, is termed as

Isochoric
Isobaric
Isothermal
Adiabatic

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

Closed system
Isolated system
Open system
None of these

Out of boiling point (I), entropy (II), pH (III) and e.m.f. of a cell (IV), intensive properties are –

I, II
I, II, III
I, III, IV
All the above

A thermodynamic state function is

one which obeys all the laws of thermodynamics
a quantity which is used in measuring thermal changes
one which is used in thermo chemistry
a quantity whose value depends only on the state of the system.

In thermodynamics, a process is called reversible when

surroundings and system change into each other
there is no boundary between system and surroundings
the surroundings are always in equilibrium with the system
the system changes into the surroundings spontaneously

Which one of the following statement is false–

work is a state function
temperature is a state function
change in the state is completely defined when the initial and final states are specified
work appears at the boundary of the system.

A mixture of two moles of carbon monoxide and one mole of oxygen, in a closed vessel is ignited to convert the carbon monoxide to carbon dioxide. If OH is the enthalpy change and OE is the change in internal energy, then

$OH \lt OE $
$ OH \gt OE $
OH = OE
The relationship depends on the capacity of the vessel

At constant T and P, which one of the following statements is correct for the reaction, $ CO_{(g)} + { 1 \over 2 } O_{2(g) } \rightarrow CO_{2(g) } $

OH is independent of the physical state of the reactants of that compound (
$ OH \lt OE $
$ OH \gt OE $
OH = OE

If $ \triangle H $ is the change in enthalpy and the changes in internal energy accompanying a gaseous reaction

$ \triangle H $ is always greater than $ \triangle E $
$ \triangle H \lt \triangle E $ only if the number of moles of the products is greater than the number of the reactants
$ \triangle H $ is lways less than $ \triangle E $
$ \triangle H \lt \triangle E $ only if the number of moles of the products is less than the number of moles of the reactants

Enthalpy is an ________property

Extensive
Exclusive
Intensive
Inclusive

Select the correct set of statements/s : I . Work done by the surrounding in case of infinite stage expansion is more than single stage expansion II . Irreversible work is always greater than reversible work III . On an ideal gas in case of single stage expansion and compression system as well as surrounding are restored back to their original states IV . If gas is in thermodynamic equilibrium is taken from state A to state B , by four successive single stage expansions,. Then we can plot 4 points on the P-V indicator diagram

II
I , II, III , IV
II , IV
I , II , IV

Hess Law of Heat summation includes

Initial reactants only
Initial reactants and final products
Final products only
Intermediates only

NEET Chemistry Questions: Chemical Thermodynamics