Pakistan MCQs

Alcohols contain an -OH bonded to a saturated carbon.
Their properties include hydrogen bonding.

Magnetic fields are produced by magnets and moving charges.
Their direction is indicated by field lines.

An aldehyde has a carbonyl carbon bonded to at least one hydrogen.
The group is commonly written -CHO.

Magnetic force is qvB sinθ in magnitude.
It changes direction of motion but does no work on the charge.

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

Faraday's law links induced emf to the rate of magnetic-flux change.
Relative motion or changing current can produce induction.

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

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

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

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

Both s and d electrons may participate in bonding or ion formation.
This permits several stable oxidation states.

Ligands act as Lewis bases.
They form coordinate covalent bonds with metal ions.