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Question 2
A
all the reactants have been used up 
B
all the products have been formed 
C
there is no further change in temperature 
D
the rates of the forward and backward reactions are equal 
E
the rate of formation of the products decreases with time 
Explanation.
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No official Explanation yet!


Correct Option:
D
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Question 4
A
manufacture of tetraoxosulphate (VI) acid 
B
prevention of the growth of fungi 
C
vulcanization rubber 
D
manufacture of dyes 
E
coating of steel to prevent rusting 
Explanation.
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No official Explanation yet!


Correct Option:
E
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Question 5
A
is a double decomposition 
B
is a neutralization 
C
is reversible 
D
is usually catalysed 
E
attains equilibrium after a few seconds 
Explanation.
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No official Explanation yet!


Correct Option:
B
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Question 7
A
Addition or presence of a catalyst 
B
Size of the reacting particles 
C
The enthalpy change for the reaction 
D
Concentration of the reactants 
E
Temperatureat which the reaction is carried out 
Explanation.
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No official Explanation yet!


Correct Option:
C
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Question 8
A
Addition or presence of a catalyst 
B
Size of the reacting particles 
C
The enthalpy change for the reaction 
D
Concentration of the reactants 
E
Temperatureat which the reaction is carried out 
Explanation.
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No official Explanation yet!


Correct Option:
C
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Question 9
A
6.02 x 10 23 
B
3.01 x 1022 
C
6.02 x 1022 
D
5. 08 x 1022 
E
3.01 x 1022 
Explanation.
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27g Aluminium = \(6.02 \times 10^{23}\)

1g Al = \(\frac{6.02 \times 10^{23}}{27}\)

2.7g Al = \(\frac{6.02 \times 10^{23}}{27} \times 2.7\)

= \(6.02 \times 10^{22} Al \) atoms


Correct Option:
C
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