Q19 of 26 Page 1

(i) MnO is basic whereas Mn2O7 is acidic in nature. Why?

(ii) Transition metals form alloys. Why?


(iii) Complete the following equation:


2 MnO2 + 4 KOH + O2→


(i) Mn has +7 oxidation state in Mn₂O₇ and +2 in MnO. Transition metals are basic in lowest oxide and acts as acidic in highest oxide. Thus, MnO is basic whereas Mn2O7 is acidic in nature.


(ii) Transition metals form alloys due to their similar ionic radii because of this they are capable of replacing each other from lattice and can thus form a large no. of alloys.


(iii) 2 MnO2 + 4 KOH + O2KNO3→ 2 K2MnO4 + 2 H2O


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17

Predict the products of the following reactions:


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Write the names and structures of the monomers of the following polymers:

(i) Glyptal


(ii) Teflon


(iii) Nylon-6


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(i) What type of isomerism is shown by the complex [Ag(NH3)2][Ag(CN)2]?

(ii) On the basis of crystal field theory, write the electronic configuration for d4 ion if ΔO<P.


(iii) Write the hybridization and shape of [Ni(CN)4]2-. (Atomic number of Ni = 28)


 21

Give reasons for the following:

(i) Benzyl chloride is highly reactive towards the SN1 reaction.


(ii) 2-bromobutane is optically active but 1-bromobutane is optically inactive.


(iii) Electrophilic reactions in haloarenes occur slowly.