Pakistan MCQs

Alkenes are unsaturated hydrocarbons.
Their double bond contains one sigma and one pi bond.

An ohmic conductor has V=IR under constant temperature and conditions.
Its V-I graph is linear through the origin.

Alkynes are unsaturated hydrocarbons.
The triple bond contains one sigma and two pi bonds.

Series resistors carry the same current.
The voltage drops add to the source voltage.

Each carbon in an alkane forms four bonds.
An open-chain saturated hydrocarbon follows CnH2n+2.

Parallel resistors share the same voltage.
The total resistance is less than the smallest branch resistance.

One double bond reduces hydrogen count by two relative to an alkane.
Thus the formula is CnH2n.

Electrical power can be written P=VI.
It may also be expressed as I²R or V²/R.

A triple bond reduces hydrogen count by four relative to an alkane.
The general formula becomes CnH2n-2.

A capacitor consists of separated conductors.
Its capacitance measures charge stored per unit potential difference.

Functional groups determine much of a molecule's chemistry.
Examples include hydroxyl, carbonyl, and carboxyl groups.

Capacitance is C=Q/V.
Its SI unit is the farad.