Q. 204.8( 11 Votes )
Name two metals which are used:
(a) for making electric wires.
(b) for making domestic utensils and factory equipment.
(c) for making jewelry and to decorate sweets.
(a) For making electric wires, two metals used are Aluminium and Copper.
(b) For making domestic utensils and factory equipment the two metals used are Copper and Aluminium.
(c) For making jewelry and to decorate sweets the two metals used are Gold and Silver.
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i. What is observed when a solution of potassium iodide is added to a solution of lead nitrate taken in a test tube?
ii. What type of reaction is this?
iii. Write a balanced chemical equation to represent the above reaction.
A brown substance ‘X’ on heating in air forms a substance ‘Y’. When hydrogen gas is passed over heated ‘Y’, it again changes back into ‘X’.
i. Name the substance ‘X’ and ‘Y’
ii. Name the type of chemical reactions occurring during both the changes.
iii. Write the chemical equations of the reactions.Xam idea - Science