Pakistan MCQs

Current is charge divided by time.
I=120/30 = 4 A.

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

Lenz's law gives the direction of induced current.
It reflects conservation of energy.

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

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

Electric potential is a scalar measured in volts.
Potential difference drives charge movement in circuits.

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

Current is I=Q/t.
Its SI unit is the ampere.

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

Potential difference is V=W/Q.
One volt equals one joule per coulomb.

Alkanes are saturated because they contain the maximum number of hydrogens.
Their general acyclic formula is CnH2n+2.

Resistance relates voltage and current through Ohm's law.
Its SI unit is the ohm.