Question

1-

Which battery system is based on half reactions involving zinc metal and manganese dioxide?

Select one:

a. None of these

b. dry-cell batteries

c. lead-acid storage batteries

d. alkaline batteries

e. fuel cells

2-

According to the collision theory of chemical reactions:

Select one:

a. low energy collisions result in many successful reactions as there is sufficient time for the reactants to form products.

b. low energy collisions do not occur in the gas phase.

c. high energy collisions result in few successful reactions as there isn't sufficient time for the products to react.

d. high energy collisions lead to the successful formation of products.

e. All of these

Answer 1

Thank you.......

dry - cell batteries: In this kind of battery the anode will be in the form of zinc. There will be a electrochemical reaction between zinc and manganese dioxide. High energy collisions lead to the successful formation products. Because the reaction only occure when the colliding particles attest have energy equal to activation energy & collision theory equation is given as Z = N_A N_B 6_AB squareroot 8 K_B T/pi M_AB which is free from time factor.