The bond in nitrogen molecule (N₂) is: MCQ with Answer and Explanation

Explanation:
Redox stands for reduction-oxidation. In any redox reaction, oxidation (loss of electrons) and reduction (gain of electrons) always occur simultaneously. The substance oxidized acts as a reducing agent, and the substance reduced acts as an oxidizing agent. One cannot happen without the other.

Explanation:
Phenolphthalein: pH range 8.3–10; colorless below 8.3, pink above. Litmus is red in acid, blue in base. Methyl orange red in acid, yellow in base. Turmeric yellow in acid, reddish-brown in base.

Explanation:
Nylon-6,6 is a condensation polymer formed by reaction between hexamethylenediamine and adipic acid, with elimination of water molecules. Polythene, Teflon, and PVC are addition polymers where monomers add without loss of small molecules. Condensation polymers often have amide or ester linkages. Another example is polyester (terylene). Nylon is a polyamide, known for strength and elasticity.