Read the following questions carefully and answer them. 

The gas used for artificial fruit ripening of green fruit is —

Which of these non-metals is shiny?

Read the following questions carefully and answer them. 

Polythene is polymer of

Of the options listed below, the speed of sound is highest in _____ at 25°C. 

Which of the following compound contains only Carbon and Hydrogen atoms in their formation?

NaHCO3 is chemical formula for ___________.

Which of the following is an oxidising agent ? 

In chemistry, soap is a salt of a ............