Q. 62 D4.3( 7 Votes )
What happens when a metal reacts with dilute hydrochloric acid? Explain with the help of an example.
Example:- Magnesium chloride and hydrogen gas are formed when the metal magnesium react with dilute hydrochloric acid.
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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