Question

Match the statements given in Column I and Column II.

Column I		Column II
A	Catalyst alters the rate of reaction.	1	Cannot be fraction or zero.
B	Molecularity	2	Proper orientation is not there.
C	Second half-life of first order reaction.	3	By lowering the activation energy.
D	$e^{-E_{a} / R T}$	4	Is same as the first.
E	Energetically favourable reactions are sometimes slow.	5	Total probability is one.
F	Area under the Maxwell, Boltzmann curve is constant	6	Refers to the fraction of molecules with energy equal to or greater than activation energy.

• A. $A-(3), B-(1), C-(4), D-(6), E-(2), F-(5)$
• B. $A-(4), B-(3), C-(1), D-(6), E-(2), F-(5)$
• C. $A-(1), B-(3), C-(4), D-(2), E-(6), F-(5)$
• D. $A-(6), B-(2), C-(5), D-(4), E-(3), F-(1)$

Answer 1

Answer: (A)

$A. \rightarrow (3)\,\, B. \rightarrow(1)\,\, C. \rightarrow (4)\,\, D. \rightarrow (6)\,\, E. \rightarrow(2)\,\, F. \rightarrow(5)$
1. Catalyst alters the rate of reaction by lowering activation energy.
2. Molecularity cannot be fraction or zero. If molecularity is zero, then reaction is not possible.
3. Second half-life of first order reaction is same as first because half-life time is temperature independent.
4. $e^{-E_{a} / R T}$ refers to the fraction of molecules with kinetic energy equal to or greater than activation energy.
5. Energetically favourable reactions are sometimes slow due to improper orientation of molecule cause some ineffective collision of molecules.
6. Area under the Maxwell, Boltzmann curve is constant because total probability of molecule taking part in a chemical reaction is equal to one.