Question

Q.1 What is the difference between an anion & cation ? Q.2 Write down chemical formula of i) Hydrogen peroxide ii) Tin chloride iii) Barium sulphate iv) Silver chloride Q.3 Write chemical names of i) Ni(NO3)2 ii) CdCO3 iii) NaOH iv) NH4NO2 4. Mole Concept The mole (mol) is the amount of a substance that contains as many elementary entities as there are atoms in exactly 12.00 grams of "? The Avogadro constant is named after the early nineteenth century Italian scientist​

Answer 1

1) An anion is an ion that has gained one or more electrons, acquiring a negative charge. A cation is an ion that has lost one or more electrons, gaining a positive charge. Metals are mostly anions and non metals are mostly cations with an exception of Hydrogen ( H+).

Example: Anion - Na+, Ba2+, Fe3+

Cation : SO4-, SO3(2-),Cl-

2) Hydrogen Peroxide- H202

Tin Chloride- SnCl2

Barium Sulphate- BaSO4

Silver Chloride- AgCl

Answer 2

Explanation:

carbon dioxide and chlorophyll