Chemical Kinetics Test

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Chemical Kinetics Test - 1

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Weekly Quiz Competition

Question 1
1 / -0

The rate of a chemical reaction

A
Increases as the reaction proceeds

B
Decreases as the reaction proceeds

C
May increase or decrease during the reaction

D
Remains constant as the reaction proceeds

Solution

Rate of reaction continuously decreases with time.
Question 2
1 / -0

The rate of a reaction that not involve gases is not dependent on

A
Pressure

B
Temperature

C
Concentration

D
Catalyst

Solution

The rate of reaction depends upon conc. of reactant, surface area of reactant, temperature, presence of light and catalyst.
Question 3
1 / -0

The rate at which a substance reacts depends on its

A
Atomic weight

B
Equivalent weight

C
Molecular weight

D
Active mass

Solution

According to law of mass action.
Question 4
1 / -0

The rate law for the reaction RCl + NaOH(aq) → ROH + NaCl is given by Rate = K₁[RCl]. The rate of the reaction will be

A
Doubled on doubling the concentration of sodium hydroxide

B
Halved on reducing the concentration of alkyl halide to one half

C
Decreased on increasing the temperature of the reaction

D
Unaffected by increasing the temperature of the reaction

Solution

R = K[RCl], if [RCl] = 1/2, then rate = R/2.
Question 5
1 / -0

If doubling the concentration of a reactant `A' increases the rate 4 times and tripling the concentration of `A' increases the rate 9 times, the rate is proportional to

A
Concentration of `A'

B
Square of concentration of `A'

C
Under root of the concentration of `A'

D
Cube of concentration of `A'

Solution

2² = 4, 3² = 9
Question 6
1 / -0

The rate of chemical reaction at constant temperature is proportional to

A
The amount of products formed

B
The product of masses of the reactants

C
The product of the molar concentration of the reactants

D
The mean free path of the reaction

Solution

The rate of chemical reaction ∝The product of the molar conc. of the reactants (at constant T)
Question 7
1 / -0

When a reaction is progressing

A
The rate of the reaction goes on increasing

B
The concentration of the products goes on decreasing

C
The concentration of the reactants goes on decreasing

D
The reaction rate always remains constant

Solution

As reaction progressing the concentration of the reactants decreases and the concentration of the product increases.
Question 8
1 / -0

If the concentration of the reactants is increased, the rate of reaction

A
Remains unaffected

B
Increases

C
Decreases

D
May increase or decrease

Solution

Greater are the concentrations of the reactants, faster is the reaction. Conversely, as the concentrations of the reactants decreases, the rate of reaction also decreases.

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Chemical Kinetics Test - 1

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Chemical Kinetics Test - 1

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Question 1

Increases as the reaction proceeds

Decreases as the reaction proceeds

May increase or decrease during the reaction

Remains constant as the reaction proceeds

Solution

Question 2

Pressure

Temperature

Concentration

Catalyst

Solution

Question 3

Atomic weight

Equivalent weight

Molecular weight

Active mass

Solution

Question 4

Doubled on doubling the concentration of sodium hydroxide

Halved on reducing the concentration of alkyl halide to one half

Decreased on increasing the temperature of the reaction

Unaffected by increasing the temperature of the reaction

Solution

Question 5

Concentration of `A'

Square of concentration of `A'

Under root of the concentration of `A'

Cube of concentration of `A'

Solution

Question 6

The amount of products formed

The product of masses of the reactants

The product of the molar concentration of the reactants

The mean free path of the reaction

Solution

Question 7

The rate of the reaction goes on increasing

The concentration of the products goes on decreasing

The concentration of the reactants goes on decreasing

The reaction rate always remains constant

Solution

Question 8

Remains unaffected

Increases

Decreases

May increase or decrease

Solution

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