Question

Give examples of the following:

a. Positive radicals

b. Basic radicals

c. Composite radicals

d. Metals with variable valency

e. Bivalent acidic radicals

f. Trivalent basic radicals

Answer 1

a. Na⁺ – Sodium ion, K⁺ – Potassium ion

b. Na⁺ – Sodium ion, K⁺ – Potassium ion, Ag⁺ – Silver ion

c. \(SO_4^{2-}, NH_4^{+}\)

(a) Iron (Ferrum) 

(i) Fe²⁺ – Ferrous [Iron – II] 

(ii) Fe³⁺ – Ferric [Iron – III]

(b) Copper (Cuprum)

(i) Cu⁺ – Cuprous [Copper -1] 

(ii) Cu²⁺ – Cupric [Copper – II]

(c) Mercury (Hydragyrum) 

(i) Hg⁺ – Mercurous [Mercury -1] 

(ii) Hg²⁺ – Mercuric [Mercury – II]

e. O^2- – Oxide, S^2- – Sulphide,\(CO_3^{2-}\) – Carbonate

f. Al³⁺ – Aluminium, Cr³⁺ – Chromium, Fe³⁺ – Ferric.