Give two important uses of washing soda and baking soda.
Two important used of washing soda and baking soda are as follows :
$(1)$ Washing soda :
$(a)$ It is used in glass, soap, and paper industries.
$(b)$ It is used to remove permanent hardness of water.
$(2)$ Baking soda :
$(a)$ It is used as baking powder. Baking powder is a mixture of baking soda and a mild acid known as tartaric acid. When it is heated or mixed in water, it releases $CO _{2}$ that makes bread or cake fluffy.
$(b)$ It is used in soda-acid fire extinguishers.
Name the sodium compound which is used for softening hard water.
You have two solutions, $A$ and $B$. The $pH$ of solution $A$ is $6$ and $pH$ of solution $B$ is $8$. Which solution has more hydrogen ion concentration Which of this is acidic and which one is basic?
Which gas is usually liberated when an acid reacts with a metal? Illustrate with an example. How will you test for the presence of this gas ?
What is a neutralisation reaction? Give two examples.
What will happen if a solution of sodium hydrocarbonate is heated ? Give the equation of the reaction involved.