Chemical Kinetics

Question 1

In the formation of ammonia, order is 0 only when:

Answer 1

Pressure is high

Question 2

1st order seen in

Answer 2

Artificial & natural radioactivity

Question 3

2nd order comes under;

Answer 3

Saponification(add NaOH) of ester

Question 4

Factors for rate of reaction

Answer 4

Conc, Surf Area, Temp Catalyst, Nature of reactant

Question 5

Elementary vs complex reactions

Answer 5

Rns take place in 1 step vs more than 1 step

Question 6

Ist order examples

Answer 6

N2O5 to 4NO2 + O2
SO2Cl2 to SO2 + Cl²
Hydrogenation of ethene

Question 7

___ of the slowest step is the order of rn.

Answer 7

Molecularity

Question 8

Molecularity vs order

Answer 8

Molecularity: no of molecules taking part in an elementary rn, only for elementary, found theoretically, can’t be 0 or fraction
Order: sum of powers, both elementary & complex rns, found experimentally, can be 0 or frac

Question 9

Rate vs rate const

Answer 9

Rate: change in conc of R or P, r = k[a][b], mol/Ls
Rate const: const of prop in differential rate eqn, written as k, mol/Ls or 1/s or 1/mol

Question 10

Rate const for 0 order

Answer 10

K = ([R(o)] - [R])/t

Question 11

K for 1st order

Answer 11

K = 2.303/t log[R(o)]/[R]

Question 12

which all factors does catalyst not affect?

Answer 12

ΔG, energy of reactants & products, ΔH, ΔS and K(c)

Question 13

Examples for pseudo 1st order rns

Answer 13

Hydrolysis of ethyl benzoate
Ch3COOC6h5 + h20 -> Ch3COOH + C6h5Oh
Inversion of cane sugar: c12h22o11 + h20 -> c6h12o6 + c6h12o6

Question 14

When conc increases, emf

Answer 14

decreases

Question 15

NO3 is

Answer 15

nitrate

Question 16

NO2 is

Answer 16

nitrite

Question 17

ln K Vs 1/T graph

Answer 17

-ve slope
-Ea/R

Question 18

Effective collision

Answer 18

Collisions with energy more or equal to activation energy

Question 19

Collision freq

Answer 19

No of collisions per sec