What is produced by the reaction of $Ca(OH)_2$ with $SO_2$?

Give uses of carbon dioxide.

$NaOCl$ is used as a bleaching agent and sterilising agent. It can be synthesized by the action of:

What is the increasing order of stability of the $+2$ oxidation state for the given group $14$ elements?

$A$ $1 \ L$ flask is full of brown bromine vapour. The intensity of the brown colour of the vapour will not decrease appreciably on adding which of the following to the flask?

What are allotropes? Sketch the structure of two allotropes of carbon namely diamond and graphite. What is the impact of structure on physical properties of two allotropes?