4.
(a) Distinguish between metals and nonmetals.
(b) How are metallic sulphates prepared?
(c) Define an alloy with a suitable example.
What happens when: (any five)
a) Sodium is burnt in the atmosphere of carbon dioxide.
b) Zinc is dissolved in moderately concentrated nitric acid.
c) Copper is heated with concentrated sulphuric acid.
(d) Chlorine is passed over finely powdered aluminum.
e) Lead is heated in air.
f) Iron is allowed to react with very dilute nitric acid.
(a) Explain the term functional group, with suitable examples.
(b) How will you convert ethylene to formaldehyde?
What happens when benzene is heated with concentrated sulphuric acid?
(d) Write short note on polyvinyl chloride
(b) Describe the convenient method for chlorine gas.
(c) How does ammonia react with
(i) Heated sodium
(ii) Hydrochloric acid
(iii) Copper sulphate solution
Answer (2)
This answer details the preparation of chlorine gas, the reactions of ammonia, and various chemical reactions involving metals. It also explains the differences between metals and nonmetals, how metallic sulfates are prepared, and definitions and examples of alloys and functional groups. Additionally, it covers chemical reactions of specific substances including sodium, zinc, copper, lead, and iron in various conditions. ;
This answer distinguishes between metals and nonmetals, explains the preparation of metallic sulfates, and defines alloys with examples. It also discusses the reactions of various chemicals and explains the concepts of functional groups, the conversion of ethylene to formaldehyde, and the properties of polyvinyl chloride. Furthermore, it provides methods for producing chlorine gas and interactions of ammonia with sodium, hydrochloric acid, and copper sulfate solution.
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