Limiting reactant in a chemical reaction decides the

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

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)

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

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

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

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

A

Linearly

B

Exponentially

C

Logarithmically

D

Inversely

The conversion of a reactant, undergoing a first order reaction, at a time equal to three times the half life of the reaction is

A

0.875

B

0.5

C

0.425

D

Data insufficient to calculate

The minimum energy required to allow a chemical reaction to proceed is termed as the 'threshold energy '. Chemical reaction with low activation energy are

A

Always irreversible

B

Insensitive to temperature changes

C

Mostly irreversible

D

Highly temperature sensitive

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

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

Limiting reactant in a chemical reaction decides the

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