Question

39. Answer the following questions:
(a) Give scientific reason : 22 carat gold is used for making ornaments.
(b) Which chemical reaction is used to obtain metal from its oxide ?​

Answer 1

( a It easily breaks and thus cannot be used in making ornaments. Thus, pure gold is alloyed with other metals (like copper) (22-carat gold) to provide proper hardness to gold for making ornaments.

( b ) The chemical process used for obtaining a metal from its oxide is reduction. In this process, metal oxides are reduced by using suitable reducing agents such as carbon or by highly reactive metals to displace the metals from their oxides. The chemical process used for obtaining a metal from its oxide is reduction.

Answer 2

Answer:

• It easily breaks and thus cannot be used in making ornaments. Thus, pure gold is alloyed with other metals (like copper) (22-carat gold) to provide proper hardness to gold for making ornaments.

• Reduction process is used for converting metal oxides into metal. Various reducing agents are used for different metal oxides to obtain free metal. Complete step by step answer: The reduction process is useful to obtain free metal from oxides.