Q11 of 53 Page 1

Complete the following equations :

(i) Ag + PCl5


(ii) CaF2 + H2SO4


(i) [Ag oxidises P(+3) in PCl3 to +5 in PCl5]


(ii) [Double displacement reaction]


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9

Write the name of monomers used for getting the following polymers :

(i) Terylene


(ii) Nylon-6, 6


 10

Describe the role of the following :

(i) SiO2 in the extraction of copper from copper matte


(ii) NaCN in froth floatation process


 13

(i) Write the type of magnetism observed when the magnetic moments are oppositively aligned and cancel out each other.

(ii) Which stoichiometric defect does not change the density of the crystal ?


 14

Define the following terms :

(i) Fuel cell


(ii) Limiting molar conductivity