Q10 of 47 Page 1

Write the names of two fuels other than hydrogen used in fuel cell. Write two advantages of fuel cell over an ordinary cell.

Two fuels other than hydrogen used in fuel cell are methane and methanol.


Two advantages of fuel cell over an ordinary cell are


1. Fuel cells produce electricity with an efficiency of about 70% compared to thermal plants whose efficiency is about 40%.


2. Fuel cells are pollution free and the biproduct formed is H2O.


More from this chapter

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8

Complete and balance the following equation:

(a) NH3 (excess) + Cl2


(b) XeF6 + 2H2O


OR


Write balanced chemical equations involved in the following reactions:


(a) XeF4 reacts with SbF5.


(b) Ag is heated with PCl5.


 9

Write any two oxoacids of sulphur and draw their structures.

 18

Give reasons for the following:

a) Acidic character decreases from N2O3 to Bi2O3.


b) All the P-Cl bonds in PCl5 are not equivalent.


c) HF is a weaker acid than HCl in an aqueous solution.


 19

Write the structure of Monomers used to obtain the following polymers:

(a) Natural rubber


(b) PVC


(c) Nylon- 6,6


OR


Write the mechanism of free radical polymerization of ethene.