Pakistan MCQs

In this sentence, 'light' names a thing that can be turned off.
Therefore, it functions as a noun rather than a verb or adjective.

Quantitative methods produce numerical concentration or mass results.
Accuracy, precision, and calibration are essential.

'Under' shows the spatial relationship between the keys and the cushion.
Words that express such relationships are prepositions.

Components travel at different rates through the system.
Chromatography can separate, identify, and quantify substances.

'But' joins two independent clauses of equal grammatical importance.
It is one of the standard coordinating conjunctions.

Solutes interact differently with the stationary phase.
Stronger interaction generally slows movement.

'Honesty' names a quality rather than a physical object.
Names of qualities, ideas, or states are abstract nouns.

The mobile phase may be a liquid or gas.
Its composition influences separation.

For suitable dilute solutions, absorbance is proportional to concentration.
The relationship also depends on molar absorptivity and path length.

Calibration creates a relationship between signal and concentration.
Unknown samples are interpreted using that relationship.

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

Complete combustion gives carbon dioxide and water.
Limited oxygen may produce carbon monoxide or soot.