# The 6M NaOH solution has t1/2equal to 20min. The t1/2for 4M NaOH solution is

1.  Less than 20 min

2.  Equal to 20 min

3.  Greater than 20 min

4.  None of these

4
Correct Answer :

Equal to 20 min

Explanation :
No Explanation available for this question

# The rate law expression for four reactions are given below. In which case, the percentage increase in the rate of reaction would be maximum when the concentration of A is double

1.  Rate =k [A]

2.  Rate =k [A]3/2

3.  Rate =k [A]0

4.  Rate =k [A]2

4
Correct Answer :

Rate =k [A]2

Explanation :
No Explanation available for this question

1.  1.5

2.  1

3.  2

4.  3

4
Correct Answer :

1

Explanation :
No Explanation available for this question

1.  1

2.  Zero

3.  2

4.  cannot be calculated

4
Correct Answer :

cannot be calculated

Explanation :
No Explanation available for this question

# Consider the reaction, 2A+B→Products When concentration of B alone was doubled, the half -life did not change. When the concentration of A alone was doubled, the rate increased by two times. The unit of rate constant for this reaction is:

1.  No unit

2.  mol L-1s-1

3.  s-1

4.  Lmol L-1s-1

4
Correct Answer :

Lmol L-1s-1

Explanation :
No Explanation available for this question

# The equation for the rate proceed is given by: k=pz e-Ea/RT. A chemical reaction will proceed more rapidly if there is a decrease in:

1.  T

2.  Z

3.  Ea

4.  P

4
Correct Answer :

Ea

Explanation :
No Explanation available for this question

# The rate of the reaction :2NO+O2→ 2NO2at 298Kis 0.014molL-1s-1. The experimental rate is given as Rate =k[NO]2[O2]if the initial concentration of reactants are: [NO]=0.01molL-1 and [O2]=0.02molL-1,then the rate constant is

1.  7.0x10-2L2mol-2s-1

2.  7.0x10-2Lmol-2s-1

3.  7.0x10-4Lmol-2s-1

4.  7.0x103L2mol-2s-1

4
Correct Answer :

7.0x103L2mol-2s-1

Explanation :
No Explanation available for this question

# A lump of coal burns slowly in air while coal dust burns explosively. This is because of

1.  Less mass of powdered coal

2.  Large surface area of coal dust

3.  Lower ignitionb temperature of coal dust

4.  Nature of coal dust

4
Correct Answer :

Large surface area of coal dust

Explanation :
No Explanation available for this question

# The conversion of A to B follows second order kinetics. Doubling the concentration of A will increase the rate of formation of B by

1.  A factor of 2

2.  A factor of 4

3.  A factor of 1/2

4.  A factor of 1/4

4
Correct Answer :

A factor of 4

Explanation :
No Explanation available for this question

# What is the half life period of a radiocative substance if 87.5% of any given amount of the substance disintegrates in 40 minutes

1.  160 min

2.  10 min

3.  20 min

4.  13 min 20 sec

4
Correct Answer :

13 min 20 sec

Explanation :
No Explanation available for this question

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