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NEET-UG SERIES
Chemistry

Enthalpy Change

7 previous year questions.

Volume: 7 Ques
Yield: Medium

High-Yield Trend

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2024
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2018
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2016
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2013
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2006

Chapter Questions
7 MCQs

01
PYQ 2006
easy
chemistry ID: neet-ug-
The enthalpy and entropy change for the reaction : Br2(l) + Cl2(g) → 2BrCl(g) are 30 kJ mol-1 and 105 JK-1 mol-1 respectively. The temperature at which the reaction will be in equilibrium is :
1

285.7 K

2

373 K

3

250 K

4

400 K

02
PYQ 2012
medium
chemistry ID: neet-ug-
Standard enthalpy of vapourisation for water at is . The internal energy of vaporisation of water at (in ) is : (Assume water vapour to behave like an ideal gas)
1
43.76
2
40.66
3
37.56
4
-43.76
03
PYQ 2013
medium
chemistry ID: neet-ug-
On the basis of thermochemical equations (a), (b) and (c), find out which of the algebric relationships given in options (i) to (iv) is correct. (1) (2) (3)
1
z = x + y
2
x = y - z
3
x = y + z
4
y = 2z - x
04
PYQ 2016
easy
chemistry ID: neet-ug-
One mole of an ideal monatomic gas undergoes a process described by the equation constant. The heat capacity of the gas during this process is -
1
2
3
4
05
PYQ 2018
medium
chemistry ID: neet-ug-
The bond dissociation energies of and are in the ratio of for the formation of is - . The bond dissociation energy of will be
1
2
3
4
06
PYQ 2024
easy
chemistry ID: neet-ug-
Arrange the following elements in increasing order of first ionization enthalpy:
Li, Be, B, C, N
Choose the correct answer from the options given below:
1
Li < Be < B < C < N
2
Li < B < Be < C < N
3
Li < Be < C < B < N
4
Li < Be < N < B < C
07
PYQ 2024
medium
chemistry ID: neet-ug-
Identify the incorrect statement from the following:
1
The acidic strength of HX (X = F, Cl, Br and I) follows the order: HF > HCl > HBr > HI.
2
Fluorine exhibits ā€“1 oxidation state whereas other halogens exhibit +1, +3, +5 and +7 oxidation states also.
3
The enthalpy of dissociation of F2 is smaller than that of Cl2.
4
Fluorine is stronger oxidising agent than chlorine.