12th Chemistry Monthly Test - 2 ( Chemical Kinetics )

St. Britto Hr. Sec. School - Madurai

12th Chemistry Monthly Test - 2 ( Chemical Kinetics )-Aug 2020

Time : 2.00 Hours

Part - A

Generic 2 - Answer All Question

What is an elementary reaction? Give the differences between order and molecularity of a reaction

Why is instantaneous rate preferred over average rate?

H_2(g) + Cl_2(g) \(\overset { hv }{ \longrightarrow } \) 2HCl(g). The reaction proceeds with a uniform rate throughout. What do you conclude?

Define half life of a reaction. Show that for a first order reaction half life is independent of initial concentration

The decomposition reaction of ammonia gas on platinum surface has a rate constant R = 2.5 X 10^-4mol L^-1. What is the order of the reaction.

How does the value of rate constant vary with reactant constant.

The rate law for a reaction of A, B and C has been found to be rate =k[A]²[B][L]^3/2 How would the rate of reaction change when
(i) Concentration of [L] is quadrupled
(ii) Concentration of both [A] and [B] are doubled
(iii) Concentration of [A] is halved
(iv) Concentration of [A] is reduced to \(\left( 1/3 \right) \) and concentration of [L] is quadrupled.

Describe the graphical representation of first order reaction.

Write the rate law for the following reactions.
(a) A reaction that is 3/2 order in x and zero order in y.
(b) A reaction that is second order in NO and first order in Br₂.

Write the units of zeroth, first, second and third order rate constants.

Define average rate and instantaneous rate

Derive integrated rate law for a zero order reaction A\(\longrightarrow \) product

For a reaction A + B ⟶ C, the rate of the reaction is denoted \(\frac { -dA }{ dt } \) or \(\frac { -dB }{ dt } \) or \(\frac { +dC }{ dt } \). State the significance of plus and minus sign.

What is the study of chemical kinetics used for?

For the reaction
Cl_{2 (g)} + 2NO _(g)⟶ 2NOCI_(g)
The rate law is expressed as
rate = K[Cl₂] [NO]²
What is the overall order of this reaction

Part - B

Generic 5 - Answer All Question

The half life of the homogeneous gaseous reaction SO₂Cl₂→ SO₂ + Cl₂ which obeys first order kinetics is 8.0 minutes. How long will it take for the concentration of SO₂Cl₂ to be reduced to 1% of the initial value?

The activation energy of a reaction is 225 k Cal mol^-1and the value of rate constant at 40°C is 11.8X10^-6s^-1Calculate the frequency factor, A.

Benzene diazonium chloride in aqueous solution decomposes according to the quation \({ C }_{ 6 }{ H }_{ 5 }{ N }_{ 2 }Cl\longrightarrow { C }_{ 6 }{ H }_{ 5 }Cl+{ N }_{ 2 }\) Starting with an initial concentration of 101 g L^-1, the volume of N₂gas obtained at 50 °C at different intervals of time was found to be as under:

t(min) 6 12 18 24 30 \(\infty \)

Vol.of N₂ (ml) 19.3 32.6 41.3 46.5 50.4 58.3

Show that the above reaction follows the first order kinetics. What is the value of the rate constant?

The time for half change in a first order decomposition of a substance A is 60 seconds. Calculate the rate constant. How much of A will be left after 180 seconds?

How do nature of the reactant influence rate of reaction.

How do concentrations of the reactant influence the rate of reaction?

From the following data, show that the decomposition of hydrogen peroxide is a reaction of the first order:

t(min) 0 10 20

V(ml) 46.1 29.8 19.3

Where t is the time in minutes and V is the volume of standard KMnO₄ solution required for titrating the same volume of the reaction mixture.

A first order reaction is 40% complete in 50 minutes. Calculate the value of the rate constant. In what time will the reaction be 80% complete?

Comment

Add Comment

t(min)	6	12	18	24	30	\(\infty \)
Vol.of N₂ (ml)	19.3	32.6	41.3	46.5	50.4	58.3

InstaQB

Institutions

12th Standard English Medium

12th Standard Tamil Medium

11th Standard English Medium

11th Standard Tamil Medium

10th Standard English Medium

9th Standard English Medium

8th Standard English Medium

7th Standard English Medium

Class XII

Class XI

12Th Standard

11Th Standard

10Th Standard

9Th Standard

12th Chemistry Monthly Test - 2 ( Chemical Kinetics )

St. Britto Hr. Sec. School - Madurai

12th Chemistry Monthly Test - 2 ( Chemical Kinetics )-Aug 2020

Part - A

Generic 2 - Answer All Question

What is an elementary reaction? Give the differences between order and molecularity of a reaction

Why is instantaneous rate preferred over average rate?

H2(g) + Cl2(g) \(\overset { hv }{ \longrightarrow } \) 2HCl(g). The reaction proceeds with a uniform rate throughout. What do you conclude?

Define half life of a reaction. Show that for a first order reaction half life is independent of initial concentration

The decomposition reaction of ammonia gas on platinum surface has a rate constant R = 2.5 X 10-4mol L-1. What is the order of the reaction.

How does the value of rate constant vary with reactant constant.

Describe the graphical representation of first order reaction.

Write the rate law for the following reactions. (a) A reaction that is 3/2 order in x and zero order in y. (b) A reaction that is second order in NO and first order in Br2.

Write the units of zeroth, first, second and third order rate constants.

Define average rate and instantaneous rate

Derive integrated rate law for a zero order reaction A\(\longrightarrow \) product

For a reaction A + B ⟶ C, the rate of the reaction is denoted \(\frac { -dA }{ dt } \) or \(\frac { -dB }{ dt } \) or \(\frac { +dC }{ dt } \). State the significance of plus and minus sign.

What is the study of chemical kinetics used for?

For the reaction Cl2 (g) + 2NO (g) ⟶ 2NOCI(g) The rate law is expressed as rate = K[Cl2] [NO]2 What is the overall order of this reaction

Part - B

Generic 5 - Answer All Question

The half life of the homogeneous gaseous reaction SO2Cl2 → SO2 + Cl2 which obeys first order kinetics is 8.0 minutes. How long will it take for the concentration of SO2Cl2 to be reduced to 1% of the initial value?

The activation energy of a reaction is 225 k Cal mol-1 and the value of rate constant at 40°C is 11.8X10-6s-1Calculate the frequency factor, A.

The time for half change in a first order decomposition of a substance A is 60 seconds. Calculate the rate constant. How much of A will be left after 180 seconds?

How do nature of the reactant influence rate of reaction.

How do concentrations of the reactant influence the rate of reaction?

From the following data, show that the decomposition of hydrogen peroxide is a reaction of the first order: t(min) 0 10 20 V(ml) 46.1 29.8 19.3 Where t is the time in minutes and V is the volume of standard KMnO4 solution required for titrating the same volume of the reaction mixture.

A first order reaction is 40% complete in 50 minutes. Calculate the value of the rate constant. In what time will the reaction be 80% complete?

Comment

Other Study material

12th Chemistry Weekly Test - 3 ( Chemistry in Ever

12th Chemistry Weekly Test - 1 (Hydroxy Compounds

12th Chemistry Monthly Test - 3 ( Surface Chemistr

12th Chemistry Weekly Test - 4 ( Hydroxy Compounds

12th Chemistry Weekly Test - 3 ( Hydroxy Compounds

12th Chemistry Weekly Test - 2 ( Hydroxy Compounds

12th Chemistry weekly Test - 4 ( Electro Chemistry

12th Chemistry Monthly Test - 1 ( Electro Chemistr

12th Chemistry Monthly Test - 2 ( Electro Chemistr

12th Chemistry Monthly Test - 3 ( Electro Chemistr

12th Chemistry Weekly Test - 1 ( Surface Chemistry

12th Chemistry Weekly Test - 2 ( Surface Chemistry

12th Chemistry Weekly Test - 3 ( Surface Chemistry

12th Chemistry Weekly Test - 4 ( Surface Chemistry

12th Chemistry Monthly Test - 1 (Surface Chemistry

Tamilnadu Stateboardszs - Class

H_2(g) + Cl_2(g) \(\overset { hv }{ \longrightarrow } \) 2HCl(g). The reaction proceeds with a uniform rate throughout. What do you conclude?

The decomposition reaction of ammonia gas on platinum surface has a rate constant R = 2.5 X 10^-4mol L^-1. What is the order of the reaction.

Write the rate law for the following reactions.
(a) A reaction that is 3/2 order in x and zero order in y.
(b) A reaction that is second order in NO and first order in Br₂.

For the reaction
Cl_{2 (g)} + 2NO _(g)⟶ 2NOCI_(g)
The rate law is expressed as
rate = K[Cl₂] [NO]²
What is the overall order of this reaction

The half life of the homogeneous gaseous reaction SO₂Cl₂→ SO₂ + Cl₂ which obeys first order kinetics is 8.0 minutes. How long will it take for the concentration of SO₂Cl₂ to be reduced to 1% of the initial value?

The activation energy of a reaction is 225 k Cal mol^-1and the value of rate constant at 40°C is 11.8X10^-6s^-1Calculate the frequency factor, A.

From the following data, show that the decomposition of hydrogen peroxide is a reaction of the first order:

t(min) 0 10 20

V(ml) 46.1 29.8 19.3

Where t is the time in minutes and V is the volume of standard KMnO₄ solution required for titrating the same volume of the reaction mixture.