The process of separating petroleum into petrol, kerosene, diesel etc. is: MCQ with Answer and Explanation

Explanation:
Red litmus turning blue indicates that the solution is basic. Basic solutions have a pH greater than 7. Among the options, 10 is the only value greater than 7. pH 1 and 4 are acidic (turn blue litmus red), and 7 is neutral (no change in litmus color).

Explanation:
C₂H₆ (ethane) follows the general formula CnH₂n+2 (n=2 gives C₂H₆), which is the formula for alkanes. Alkanes are saturated hydrocarbons with single bonds. Alkenes have CnH₂n (e.g., C₂H₄), alkynes CnH₂n-2 (e.g., C₂H₂), alcohols have –OH group. Ethane is a component of natural gas and is used to produce ethylene. Methane (CH₄) is the simplest alkane.

Explanation:
Bakelite is a thermosetting phenol-formaldehyde resin with excellent heat resistance and electrical insulation properties, making it suitable for switches, handles, and electrical fittings. Polythene and PVC are thermoplastics that soften on heating. Polystyrene is brittle and not highly heat resistant. Thermosets do not melt upon reheating.