वर्तनी की दृष्टि से निरीह सही शब्द हैं
Aqua regia, which can dissolve gold, is a freshly prepared mixture of concentrated hydrochloric acid and concentrated ______.
Pentane has _____ structural isomers.
Amalgam is a mixture of
Protons were discovered by
Which material is commonly used for making casts and sculptures?
The important ore of aluminium is-
What is the chemical formula of bleaching powder?
Another name of Carborundum is
Ultra-purification of metals is achieved using:
An element has an atomic number of 17 and a mass number of 36. How many neutrons are in its nucleus?
