Molecularity of an elementary reaction, P + Q → R + S is
A. 1
B. 2
C. 3
D. 4
Answer: Option B
Solution(By Examveda Team)
The molecularity of an elementary reaction represents the number of molecules or particles that come together to react and form the products. In the given elementary reaction:P + Q → R + S
There are two reactant molecules (P and Q) that come together to form two product molecules (R and S).
Therefore, the molecularity of this elementary reaction is 2.
So, the correct answer is Option B: 2.
This Question Belongs to Chemical Engineering >> Chemical Reaction Engineering
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Comments ( 1 )
A. $${{\text{k}}_{\text{e}}}{\text{ff}} = {\text{k}} + {{\text{k}}_{\text{g}}}$$
B. $${{\text{k}}_{\text{e}}}{\text{ff}} = \frac{{{\text{k}} + {{\text{k}}_{\text{g}}}}}{2}$$
C. $${{\text{k}}_{\text{e}}}{\text{ff}} = {\left( {{\text{k}}{{\text{k}}_{\text{g}}}} \right)^{\frac{1}{2}}}$$
D. $$\frac{1}{{{{\text{k}}_{\text{e}}}{\text{ff}}}} = \frac{1}{{\text{k}}} + \frac{1}{{{{\text{k}}_{\text{g}}}}}$$
The half life period of a first order reaction is given by (where, K = rate constant. )
A. 1.5 K
B. 2.5 K
C. $$\frac{{0.693}}{{\text{K}}}$$
D. 6.93 K
Catalyst is a substance, which __________ chemical reaction.
A. Increases the speed of a
B. Decreases the speed of a
C. Can either increase or decrease the speed of a
D. Alters the value of equilibrium constant in a reversible
A. $$ \propto {\text{CA}}$$
B. $$ \propto \frac{1}{{{\text{CA}}}}$$
C. Independent of temperature
D. None of these
molecularity will be 2, because the probability of 4 molecules colliding at the same time is almost impossible.