just for tes

Question 1

for a chemical reaction,a rise in temp. by 10 degree C increases k by

Answer 1

k becomes 2x

Question 2

activation energy

Answer 2

energy required to reach activated complex

Question 3

graph is draw ___v/s Kinetic energy. fill in the blank

Answer 3

Ne/Nt
Ne-> number of molecules with energy e
Nt-> total number of moleclues

Question 4

what happens to the graph ____ v/s Kinetic Energy when temperature is increased?

Answer 4

graph broadens out and moves to the right

Question 5

what does the peak of the graph show?

Answer 5

mpk-> most probable kinetic energy

Question 6

define “most probable kinetic energy”

Answer 6

K.E possessed by maximum fraction of molecules

Question 7

KClO3————–>?

(MnO2)

Answer 7

2KCl+ 3O2

Question 8

difference between catalyst and inhibitor?

Answer 8

the word inhibitor is to be used when the added substance REDUCES the rate of the reaction
Otherwise,the added substance is called catalyst

Question 9

Explain the action of a catalyst

Answer 9

Catalyst participates in chemical reaction by forming temporary bond with reactant.This forms an intermediate complex.This complex then decomposes to form the product.

Question 10

Does a catalyst alter Gibbs energy?

Answer 10

NO

Question 11

A catalyst catalyses __________ reaction,but not __________ reaction

Answer 11

spontaneous,non-spontaneous

Question 12

Role of catalyst(detailed-1 marker)

Answer 12

Catalyst creates an alternate pathway for reaction to occur such that the activation energy is reduced and hence,lowering POTENTIAL ENERGY barrier. Lowering activation energy-> faster reaction