sodium salt of benzoic acid
tartaric acid
sodium carbonate
acetic acid
The substance that cannot be used as an insecticide is
The substance that is added to make natural rubber strong & more bouncy is
The substance that is least prone to catch and spread fire is
The temperature of oxy-acetylene flame is around
The term meaning copper demon denotes the metallic element
The third shell of an atom can have a maximum of _ electrons.
The three elements most needed in common fertilisers are:
The two metal ions that cause hardness to water are:
The uranium fuel used worldwide is mainly in the form of
The working of a dry cell is based on