Molecularity of Reaction

Q. Karthik and Arun are studying chemical kinetics together. They came around this equation: $N_2+3H_2\to 2N{H}_3$.
Karthik concluded that the molecularity of the reaction is 4 as one molecule of $N_2$ is reacting with three molecules of $H_2$.
But Arun said that molecularity of 4 is very unlikely as the probability of 4 molecules colliding simultaneously is almost zero.
As they are both contradicting each another can you figure out who is correct and who is wrong.

1. Karthik is correct, Arun is wrong
2. Both are wrong
3. Karthik is wrong Arun is correct
4. Both are correct

Q. Identify the correct statement :

1. Half life of first order reaction is independent of temperature
2. First order reaction must be complex
3. A reactant molecule having sufficient energy must get converted into product
4. For zero order reaction, half life depends on initial concentration of reactant

Q.

In a series of reactions, which is the rate-determining step?

1. the simplest reaction

2. the slowest reaction

3. the fastest reaction

4. None of the above

Q.

What does termolecular refer to?

1. 2 molecules colliding

2. 4 molecules colliding

3. 3 molecules colliding

4. 1 molecule dissociating

Q. Half-life period of a zero order reaction is

1. Proportional to initial concentration of reactants
2. Independent of initial concentration of reactants
3. Inversely proportional to initial concentration of reactants
4. Inversely proportional to square of initial concentration of reactants.

Q. The rate constant of reaction is $1.2\times {10}^{-1}mo{l}^{-2}lite{r}^2{s}^{-1}$ , the order of the reaction is

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

Q. Which of the following statements about molecularity of any reaction are incorrect?

1. It is experimentally determined
2. It is meant for the reaction and not for its individual steps
3. It may or may not be whole number.
4. It can never be zero

Q. The rate constant of reaction is $1.2\times {10}^{-1}mo{l}^{-2}lite{r}^2{s}^{-1}$ , the order of the reaction is

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

Q. Certain bimolecular reactions which follow first order kinetics are called

1. Bimolecular reaction s
2. Unimolecular reactions
3. First order reaction
4. Pseudo unimolecular reactions

Q. Which of the following are the acceptable values for molecularity of a reaction?

1. 2
2. 0
3. 0.5
4. -1