NEET Order, Molecularity and Mechanism Practice Questions With Solutions

NEET Chemistry Order, Molecularity and Mechanism Practice Questions

Question 1.

For a certain reaction, the rate = \(k[A]^2[B],\) when the initial concentration of A is tripled keeping the concentration of B constant, the initial rate would be:

AIncrease by a factor of three

BDecrease by a factor of nine

CIncrease by a factor of six

DIncrease by a factor of nine

Question 2.

The correct options for the rate law that corresponds to overall first order reaction is:

A\( Rate =k[A]^0[B]^2 \)

B\( Rate =k[A][B] \)

C\(Rate=k[A]^{1 / 2}[B]^2 \)

D\(Rate =k[A]^{-1 / 2}[B]^{3 / 2}\)

Question 3.

The given graph is a representation of the kinetics of a reaction.

The y and x axes for zero and first-order reactions, respectively are:

Azero order (y=rate and x=concentration), first order (y=rate and x=t_1/2)

Bzero order (y=concentration and x=time), first order (y=t_1/2 and x = concentration)

Czero order (y=concentration and x= time), first order (y=rate constant and x= concentration)

Dzero order (y=rate and x=concentration), first order (y=t_1/2 and x = concentration)

Question 4.

The half-life for a zero-order reaction having 0.02 M initial concentration of reactant is 100 s. The rate constant (in mol L^–1 s^–1) for the reaction is:

A

1.0 \times 10^{- 4}

B

2.0 \times 10^{- 4}

C

2.0 \times 10^{- 3}

D

1.0 \times 10^{- 2}

Question 5.

When the initial concentration of the reactant is doubled,
the half-life period of a zero-order reaction:

Ais halved

Bis doubled

Cis tripled

Dremains unchanged

Question 6.

When the initial concentration of a reactant is doubled in a reaction, its half-life period is not affected. The order of the reaction will be:

A0

B1

C1.5

D2

Question 7.

The rate Constant of reaction A → B is 0.6 × 10^–3\(\mathrm{molL}^{-1} \mathrm{~S}^{-1}\). If the Concentration of A is 5M, then the concentration of B after 20 min is:

A1.08M

B3.60M

C0.36M

D0.72M

Question 8.

For the reaction,

N_{2} O_{5} (g) \to 2 {NO}_{2} (g) + \frac{1}{2} O_{2} (g)

the value of rate of disappearance of N₂O₅is given as 6.25 x 10^-3mol L^-1s^-1.The rate of formation of NO₂ and O₂ is given respectively as:

A6.25 × 10^-3 mol L^-1s^-1 and 6.25 × 10^-3 mol L^-1s^-1.

B1.25 × 10^-2 mol L^-1s^-1 and 3.125 × 10^-3 mol L^-1s^-1.

C6.25 × 10^-3 mol L^-1s^-1 and 3.125 × 10^-3 mol L^-1s^-1.

D1.25 × 10^-2 mol L^-1s^-1and 6.25 × 10^-3mol L^-1s^-1.

Question 9.

The rate of reaction between two reactants A and B decreases by a factor of 4 if the concentration of reactant B is doubled. The order of this reaction with respect to reactant B is:

A2

B-1

C1

D-2

Question 10.

If the rate of the reaction is equal to the rate constant, the order of the reaction is:

A0

B1

C2

D3

Question 1.

2 A

\to

B

+

C

; It would be a zero-order reaction when:

AThe rate of reaction is proportional to the square of the concentration of A

BThe rate of reaction remains the same at any concentration of A

CThe rate remains unchanged at any concentration of B and C

DThe rate of reaction doubles if the concentration of B is doubled

NEET Order, Molecularity and Mechanism Practice Questions With Solutions

NEET Chemistry Order, Molecularity and Mechanism Practice Questions

Question 1.

Question 2.

Question 3.

Question 4.

Question 5.

Question 6.

Question 7.

Question 8.

Question 9.

Question 10.

Question 1.

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