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

Limiting reactant in a chemical reaction decides the

A

Rate constant

B

Conversion

C

Reaction speed

D

Equilibrium constant

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

A

0

B

1

C

2

D

3

When all the limiting reactant is consumed in the reaction, the operational yield __________ the relative yield.

A

Is greater than

B

Is smaller than

C

Equals

D

Can be either greater or smaller than (depends on the type of reaction)

For a first order chemical reaction, the concentration of the reactant decreases __________ with time.

A

Linearly

B

Exponentially

C

Logarithmically

D

Inversely

রাসায়নিক বিক্রিয়ায় বিক্রিয়ক ও উৎপাদের (reactant and product of a chemical reaction ) মধ্যে মূল পরিবর্তন ঘটে কোনটি?

A

অভ্যন্তরীণ শক্তি

B

স্থিতি শক্তি

C

গতি শক্তি

D

বন্ধন শক্তি

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

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

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

Chemical potential (an intensive property) of a substance is a force that drives the chemical system to equilibrium and is equal to its partial molar properties. The reatio of chemical potential to free energy of a pure substance at oconstant temperature and pressure is

A

0

B

1

C

∞

D

None of these

Half-life period for a first order reaction is __________ the initial concentration of the reactant.

A

Directly proportional to

B

Inversely proportional to

C

Independent of

D

None of these

In a grinding operation, the limiting particle size is the size of the __________ particle in the sample.

A

Smallest

B

Largest

C

Either A or B

D

Neither A nor B

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

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