Chemistry

States of matter and the atom, element symbols and compound formulas, acids-bases-salts and the pH scale, plus the everyday-chemistry names and gases RRB asks constantly.

1. 1

   Matter & the Atom

   Matter और Atom · 8 min
   EASY
2. 2

   Elements, Symbols & Compounds

   Elements, Symbols और Compounds · 8 min
   MEDIUM
3. 3

   Acids, Bases & Salts

   Acids, Bases और Salts · 8 min
   MEDIUM
4. 4

   Everyday Chemistry & Gases

   Everyday Chemistry और Gases · 8 min
   MEDIUM