1
JEE Main 2013 (Offline)
MCQ (Single Correct Answer)
+4
-1
The rate of a reaction doubles when its temperature changes from 300K to 310K. Activation energy of such a reaction will be:(R = 8.314 JK–1 mol–1 and log 2 = 0.301)
A
48.6 kJ mol–1
B
58.5 kJ mol–1
C
60.5 kJ mol–1
D
53.6 kJ mol–1
2
AIEEE 2012
MCQ (Single Correct Answer)
+4
-1
For a first order reaction, (A) $$\to$$ products, the concentration of A changes from 0.1 M to 0.025 M in 40 minutes. The rate of reaction when the concentration of A is 0.01 M is :
A
1.73 x 10–5 M/ min
B
3.47 x 10–4 M/min
C
3.47 x 10–5 M/min
D
1.73 x 10–4 M/min
3
AIEEE 2011
MCQ (Single Correct Answer)
+4
-1
The rate of a chemical reaction doubles for every 10oC rise of temperature. If the temperature is raised by 50oC , the rate of the reaction increases by about :
A
24 times
B
32 times
C
64 times
D
10 times
4
AIEEE 2010
MCQ (Single Correct Answer)
+4
-1

Consider the reaction :

Cl2(aq) + H2S(aq) → S(s) + 2H+ (aq) + 2Cl (aq)

The rate equation for this reaction is rate = k [Cl2] [H2S]

Which of these mechanisms is/are consistent with this rate equation?

(A) Cl2 + H2S $$\to$$ H+ + Cl + Cl+ + HS (slow)

Cl+ + HS $$\to$$ H+ + Cl + S (fast)

(B) H2S $$ \Leftrightarrow $$ H+ + HS (fast equilibrium)

Cl2 + HS $$\to$$ 2Cl + H+ + S (slow)

A
B only
B
Both A and B
C
Neither A nor B
D
A only
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