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Byju's Answer
Standard XII
Chemistry
Molecular Speeds - Vrms, Vavg, Vmps
Which of the ...
Question
Which of the following process involves decrease in the entropy of system?
A
Br
2
(g)
→
Br
2
(l)
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B
Diamond to graphite
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C
N
2
(g) 10atm
→
N
2
(g). I atm
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D
Boiling of egg so that it become hard
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Solution
The correct option is
A
Br
2
(g)
→
Br
2
(l)
Boiling of egg will result in the formation of solid egg this decreases entropy
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Similar questions
Q.
Predict in how many of the following processes entropy change of the system is positive .
(i)
C
a
C
O
3
(
s
)
→
C
a
O
(
s
)
+
C
O
2
(
g
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(ii)
N
2
(
g
)
+
3
H
2
(
g
)
→
2
N
H
3
(
g
)
(iii)
H
C
l
(
g
)
+
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H
3
(
g
)
→
N
H
4
C
l
(
s
)
(iv)
2
S
O
2
(
g
)
+
O
2
(
g
)
→
2
S
O
3
(
g
)
(v) Cooling of
N
2
(
g
)
from
20
o
C
t
o
−
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C
Q.
In which of the following processes does entropy increase?
(a)
B
r
2
(
l
)
⟶
B
r
2
(
g
)
(b)
H
2
O
(
s
)
⟶
H
2
O
(
g
)
(c)
N
2
(
1
a
t
m
,
100
∘
C
)
⟶
N
2
(
1
a
t
m
,
150
∘
C
)
(d)
N
2
(
g
)
+
3
H
2
(
g
)
⟶
2
N
H
3
(
g
)
(e)
C
a
C
O
3
(
s
)
⟶
C
a
O
(
s
)
+
C
O
2
(
g
)
Q.
During which of the following processes, does entropy decrease?
(A) Freezing of water to ice at
0
o
C
(B) Freezing of water to ice at
−
10
o
C
(C)
N
2
(
g
)
+
3
H
2
(
g
)
→
2
N
H
3
(
g
)
(D) Adsorption of
C
O
(
g
)
on lead surface
(E) Dissolution of
N
a
C
l
in water
Choose the correct answer from the options given below.
Q.
For which of the following
Δ
H
is not equal to
Δ
U
Q.
In which one of the following reactants,
K
p
is less than
K
c
?
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