Types of Elementary Reactions

Q. Select the equation for [B] at any time t in the following reaction. Let the initial concentration of A be $\left[A_0\right]$ and B and C be 0.

1. $\left[B\right]=\left[B{]}_0\left(\frac{k_1\left[A\right]}{k_1+k_2}\right)\right(1-e^{-(k_1+k_2)t})$
2. $\left[B\right]=\frac{k_1\left[A\right]}{k_1+k_2}(1-e^{(k_1+k_2)t})$
3. $\left[B\right]=\frac{k_1[A{]}_0}{k_1+k_2}(1-e^{-(k_1+k_2)t})$
4. $\left[B\right]=\frac{k_1[A{]}_0}{k_1+k_2}(1-e^{(k_1+k_2)t})$

Q.

For the elementary reaction M ⟶ N, the rate of disappearance of M increases by a factor of 8 upon doubling the concentration of M. The order of the reaction with respect to M is

(IIT-JEE-Advanced 2014)

1. 4
2. 2
3. 3
4. 1

Q. Which of the following represents the rate law for the following reversible reaction?

1. $-\frac{d\left[A\right]}{dt}=k_1\left[A\right]+k_2\left[B\right]$
2. $\frac{+d\left[A\right]}{dt}=k_1\left[A\right]-k_2\left[B\right]$
3. $-\frac{d\left[B\right]}{dt}=k_1\left[A\right]-k_2\left[B\right]$
4. $-\frac{d\left[B\right]}{dt}=k_1\left[A\right]-k_2\left[B\right]$

Q. Which of the following statements are true in the case of reversible elementary reactions?

1. Rate of forward reaction is always very large.
2. Rate of backward reaction is very slow in the end.
3. Rate of forward reaction is very large at the beginning.
4. Rate of backward reaction is very slow in the beginning.

Q.

For a consecutive reaction $R_1\stackrel{k_1}{\to }{R}_2{R}_1\stackrel{k_2}{\to }{R}_3$ If initial concentration of $R_1$ is 100 M and $k_1:k_2=1:0.15$ the value of $[R_2{]}_{max}$ is $[Given:k_1=4.0\times {10}^{-2}mi{n}^{-1}]$

1. 71.55 M

2. 7.155 M

3. 5.571 M

4. 55.71 M

Q.

A substance undergoes first order decomposition involving two parallel first order reaction as :

The mol percent of B in the product is :

1. 23.17

2. 76.83

3. 30.16

4. 69.84

Q.

Which of the following statements are applicable to a balanced chemical equation of an elementary reaction?
(a) Order is same as molecularity
(b) Order is less than the molecularity
(c) order is greater than the molecularity
(d) Molecularity can never be zero

Q.

For a reaction $A+B⟶$ Products, the rate law is ---Rate = $k\left[A\right][B{]}^{3/2}$ Can the reaction be an elementary reaction? Explain.

Q.

In a reaction if the concentration of reactant A is tripled, the rate of reaction becomes twenty seven times. What is the order of the reaction?

Q.

A substance undergoes first order decomposition involving two parallel first order reaction as :

The mol percent of B in the product is :

1. 30.16

2. 69.84

3. 23.17

4. 76.83