CSS General Knowledge MCQs

Sand particles are too large to pass through filter paper.
Water passes through as the filtrate.

Evaporation removes water as vapor.
The dissolved salt remains behind as crystals.

Distillation boils water and then condenses the vapor.
Nonvolatile salts remain in the original container.

Atoms are the basic chemical units of elements.
They contain protons, neutrons, and electrons.

Protons carry positive electric charge.
They are located in the atomic nucleus.

Electrons carry negative charge.
They occupy regions around the nucleus.

Neutrons are electrically neutral.
They are found in atomic nuclei with protons.

An electric motor uses magnetic forces on current-carrying conductors.
It converts electrical energy into motion.

A generator uses electromagnetic induction.
Mechanical motion produces electrical energy.

Lightning tends to strike exposed high points and conductors.
Safer shelter is inside a substantial building or closed vehicle.

An element contains atoms with the same number of protons.
It cannot be broken into simpler substances by ordinary chemical means.

A compound contains different elements chemically bonded together.
Its properties differ from those of its constituent elements.