For a reacation, X → Y, if the concentration of 'X' is tripled; the rate becomes nine times. The order of reaction is

A 'limiting reactant' is the one, which decides the __________ in the chemical reacation.

A

Equilibrium constant

B

Conversion

C

Rate constant

D

None of these

Overall rate of reaction in a heterogenous catalytic reaction depends upon the mass and energy transfer from the fluid to solid surface and its rate of reaction is usually __________ the concentration of catalyst, if it does not entail a chain mechanism.

A

Proportional to

B

Independent of

C

Inversely proportional to

D

Proportional to the square of

Tk.6000 becomes Tk.7200 in 4 years at a certain rate of simple interest. If the rate becomes 1.5 times of itself, the amount of same principal in 5 years will be-

A

Tk.8000

B

Tk.8250

C

Tk.9000

D

Tk.9250

A chemical reaction is of zero order, when the reaction rate is (where, CA = concentration of reactant)

A

$$ \propto {\text{CA}}$$

B

$$ \propto \frac{1}{{{\text{CA}}}}$$

C

Independent of temperature

D

None of these

When the diameter of a circle is tripled, the area of the circle will be increased by how many times?

A

3

B

6

C

9

D

12

At very high concentration of enzymes, the rate of fermentation chemical reaction is __________ the concentration of reactants.

A

Independent of

B

Directly proportional to

C

Inversely proportional to

D

Proportional to the square of

If the time required for half change is inversely proportional to the square of initial concentration and the velocity depends on the units in which the concentration term is expressed, then the order of reaction is

A

1

B

2

C

3

D

0

If the time required to change the concentration of reactant to half its original value is independent of the initial concentration, the order of reaction is

A

Zero

B

One

C

Two

D

Three

Rate of a chemical reaction is independent of the concentration of the reactants for a __________ reaction.

A

Zero order

B

Third order

C

Consecutive

D

None of these

If n = overall order of a chemical reaction. a = initial concentration of reactant. t = time required to complete a definite fraction of the reaction. Then pick out the correct relationship.

A

$${\text{t}} \propto \frac{1}{{{{\text{a}}^{\text{n}}}}}$$

B

$${\text{t}} \propto \frac{1}{{{{\text{a}}^{{\text{n}} - 1}}}}$$

C

$${\text{t}} \propto \frac{1}{{{{\text{a}}^{{\text{n}} + 1}}}}$$

D

$${\text{t}} \propto {{\text{a}}^{\text{n}}}$$

For a reacation, X → Y, if the concentration of 'X' is tripled; the rate becomes nine times. The order of reaction is

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