Chemical Thermodynamics MCQs for NEET — Chemistry Questions with Answers

Practice free Chemical Thermodynamics (Chemistry) NEET multiple-choice questions online with instant answers and detailed explanations. No login required.

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The intensive property among these quantities is [KCET 2002]

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Explanation

The intensive property is mass/volume.

Which of the following is not a state function [DCE 2002]

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Explanation

ΔQ is not a state function.

Which of the following is true for an adiabatic process [DCE 2002; MP PET 1995, 98, 2004; CPMT 1990; MP PMT 1998, 2002]

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Explanation

For adiabatic process ΔQ = 0.

Which of the following is not a state function 

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Explanation

Work is not a state function as during a process its value depends on the path followed. The value of enthalpy, internal energy and entropy depends on the state and not on the path followed to get that state, hence these are state functions.

Among them intensive property is [AFMC 2004]

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Explanation

Surface tension is an intensive property which do not depend upon the quantity of matter present in the system.

The first law of thermodynamics is only

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Explanation

First low of thermodynamics is also known as Law of conservation of mass and energy.

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 ΔH is the enthalpy change and ΔE is the change in internal energy, then [KCET 2005]

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Explanation

Formation of CO2 from CO is an exothermic reaction; heat is evolved from the system, i.e., energy is lowered. Thus, exothermic reactions occur spontaneously on account of decrease in enthapy of system. Thus, ΔE > ΔH.

The relation between ΔE and ΔH is [MP PET 1992; MP PMT 1996; MP PET/PMT 1998]

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Explanation

ΔH = ΔE + PΔV.

At constant T and P, which one of the following statements is correct for the reaction, CO(g)+12O2(g)CO2(g) [AIIMS 1982, 83; KCET 1988; BHU 1995; MP PET 1997, 99]

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Explanation

Δng=132=12, As Δng is negative, thus ΔH < ΔE.  

For the reaction of one mole of zinc dust with one mole of sulphuric acid in a bomb calorimeter, ΔU and w correspond to [AIIMS 2005]

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Explanation

Bomb calorimeter is commonly used to find the heat of combustion of organic substances which consists of a sealed combustion chamber, called a bomb. If a process is run in a sealed container then no expansion or compression is allowed, so w = 0 and ∆U = q.

∆U < 0, w = 0

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