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Question-1
Which is correct for an endothermic reaction?
(A)
ΔH is positive
(B)
ΔH is negative
(C)
ΔE is negative
(D)
ΔH = zero
Question-2
Which of the following is always negative for exothermic reaction?
(A)
ΔH
(B)
ΔS
(C)
ΔG
(D)
None of these
Question-3
Reaction for the formation of NaCI is
(A)
N
2
(g) + CI
2
(g) → NaCl(s)
(B)
Na(s) +
1
/
2
Cl
2
(g) → NaCl(s)
(C)
Na(g) +
1
/
2
Cl
2
(g) → NaCl(s)
(D)
Na(g) + Cl
2
(g) → NaCl(g)
Question-4
If W is the amount of work done by the system and q is the amount of heat supplied to the system, identify the type of the system
(A)
isolated system
(B)
closed system
(C)
open system
(D)
system with thermally conducting walls
Question-5
For exothermic reaction
(A)
H
R
= H
p
(B)
H
R
> H
p
(C)
H
p
>H
R
(D)
All of these
Question-6
For an endothermic reaction, energy of activation is E
a
and enthalpy of the reaction is ΔH (both of these in KJ/mol). Minimum value of E
a
will be
(A)
equal to zero
(B)
less than ΔH
(C)
equal to ΔH
(D)
more than ΔH
Question-7
Minimum work is obtained when 1 kg of ____ gas expanded under 500 kPa to 200 kPa pressure at 0
o
C.
(A)
chlorine
(B)
oxygen
(C)
nitrogen
(D)
methane
Question-8
Which of the given properties depends on the manner in which a change is brought about?
i. ΔE ii. q iii.w
(A)
ΔE only
(B)
q and ΔE
(C)
q and w
(D)
w only
Question-9
Which of the following is the correct option for free expansion of an ideal gas under adiabatic condition?
(A)
q = 0, ΔT < 0, w ≠ 0
(B)
q = 0, ΔT ≠ 0, w = 0
(C)
q ≠ 0, ΔT < 0, w = 0
(D)
q = 0, ΔT = 0, w = 0
Question-10
One mole of an ideal gas is initially at 0
o
C and 1 atm pressure. If it absorbs 1000 cal heat during a reversible isothermal expansion, what will be its final volume?
(A)
102.5L
(B)
242.5L
(C)
22.4L
(D)
121.25L
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Plus 1 Computer Science
Kerala (English Medium)
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