Related Practice Questions :

In a catalytic reaction involving the formation of ammonia by Haber's process N2+3H2 → 2NH3, the rate of appearance of NH3 was measured as 2.5 x 10-4 mol L-1S-1 The rate of disappearance of H2 will be

1. 2.5 x 10-4 mol L-1S-1

2. 1.25 x 10-4 mol L-1S-1

3. 3.75 x 10-4 mol L-1S-1

4. 15.00 x 10-4 mol L-1S-1

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Which of the following represents the expression for 3/4 th life of a first order reaction?

1. (k/2.303) log (4/3)

2. (2.303/k) log (3/4)

3. (2.303/k) log 4

4. (2.303/k) log 3

 

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For an endothermic reaction, where ΔH represents the enthalpy of the reaction in kJ/mol, the minimum value for the energy of activation will be

1. Less than ΔH

2. Zero

3. More than ΔH

4. Equal to ΔΗ

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In the formation or sulphur trioxide by the contact process,

2SO2(g) + O2(g) 2SO3(g)

The rate of reaction is expressed as d(O2)/dt = 2.5x10-4 mol L-1sec-1. The rate disappearance of (SO2) will be

1. 5.0x10-4 mol L-1sec-1

2. 2.5x10-4 mol L-1sec-1

3. 3.75x10-4 mol L-1sec-1

4. 50.0x10-4 mol L-1sec-1

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The dissociation of H2O2 is a first order reaction. The half life for '16 V H2O2 is 30 min, calculate the time at which the solution is 1V H2O2 ?

(1) 120 min.

(2) 90 min.

(3) 60 min.

(4) 150 min.

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