Pakistan MCQs

A ketone carbonyl carbon is bonded to two carbon groups.
It occurs within the carbon skeleton.

Roasting commonly converts sulfide ores to oxides.
Sulfur is often released as sulfur dioxide.

The carboxyl group combines carbonyl and hydroxyl functions.
Carboxylic acids can donate a proton.

Calcination removes volatile components such as CO2 or water.
Carbonates may be converted to oxides.

Esters are commonly formed from carboxylic acids and alcohols.
Many have characteristic odors.

The Haber process combines nitrogen and hydrogen.
It uses high pressure, elevated temperature, and an iron catalyst.

Amines are derivatives of ammonia.
The nitrogen lone pair often makes them basic.

The Contact process oxidizes SO2 to SO3 using a catalyst.
SO3 is then converted into sulfuric acid through controlled absorption.

Structural isomers connect atoms in different sequences.
They can have different physical and chemical properties.

Organic chemistry mainly studies carbon compounds.
Some carbon compounds such as carbonates and carbon dioxide are treated as inorganic.

Stereoisomers share the same bonding sequence.
Geometric and optical isomers are major types.

Hydrocarbons are the simplest organic compounds.
They include alkanes, alkenes, alkynes, and aromatic compounds.