Chemistry 2014 | Study Mode

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Question 21
A
CO(g)
B
C(s)
C
H2O(g)
D
H(2)(g)
Explanation

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Correct option: C
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Question 22
A
32395.5
B
30156.3
C
60784.5
D
15196.5
Explanation
Cu Cu2++ 2e
64g Cu requires 2 x 96500 coloumbs 10g Cu requires x columbs
x = 10x2x96500/64 =30156.3

Correct option: B
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Question 23
A
1.00F
B
0.01F
C
0.05F
D
0.50F
Explanation
Cu Cu2+ + 2e
1mole Cu requires 2f
0.25 mole Cu requires x
x = 0.25x2/1 = 0.50f

Correct option: D
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Question 24
A
are both metals
B
belong to the same group
C
belong to the same period
D
are positioned diagonally to each other
Explanation
At the beginning of periods 2 and 3 of the Periodic Table, there are several cases where an element at the top of one group has some similarities with an element in the next group.
For example, boron is a non-metal with some properties rather like silicon. Unlike the rest of Group 2, beryllium has some properties resembling aluminium. And lithium has some properties which differ from the other elements in Group 1, and in some ways resembles magnesium.

There is said to be a diagonal relationship between these elements.

There are several reasons for this, but each depends on the way atomic properties like electronegativity vary around the Periodic Table.

Correct option: D
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Question 25
A
+2081 Jmol-1
B
-2081 Jmol-1
C
-649 Jmol-1
D
+649 Jmol-1
Explanation
G = H - TS
-899 = H - 2980
H = -899 + 2980 = + 2081 Jmol-1

Correct option: A
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Question 26
A
Equilibrium constant is very large
B
H - TS = O
C
H > T S
D
Equilibrium constant is less than zero
Explanation

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Correct option: A
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Question 27
A
entropy of reaction
B
enthalpy of reaction
C
rate of reaction
D
order of reaction
Explanation

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Correct option: C
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Question 28
A
more of the products will be formed
B
the reaction will not proceed
C
the equilibrium position will shift to the right
D
the equilibrium position will shift to the left.
Explanation

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Correct option: D
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Question 29
A
Lead
B
Magnesium
C
Cpper
D
Gold
Explanation

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Correct option: B
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Question 30
A
O 2
B
SO 2
C
HCI
D
H 2
Explanation

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Correct option: C

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