What is a mixture of potassium nitrate, powdered charcoal and sulphur called?
Mason was discovered by
The transition temperature between two allotropic forms of sulphur is
The carboxylic acid present in butter is
The Latin name of vinegar is____?
Radioactive disintegration of uranium ultimately results in formation of
Blood has been formed isotonic with
Tetraethyl lead is used as___?
Which allotrope of carbon is in rigid three dimensional structure to?
Sodium metal is kept under?
_____ discovered inert gases.