Non luminous flame occurs when air-hole is

The acid present in ant is

The study of forces and their effects are coming under

________ is used to improve the soil fertility.

The flame deposits soot and is yellow in colour is

The burning sensation of chilly pepper is due to the presence of chemical

A metallic apparatus which supports the wire gauze is 

Chemical used to kill insects is

An apparatus used for holding several test tubes is

The chemical used to bind the dye to the fabric