Everyday Science MCQs

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

Paint forms a protective barrier.
This slows the electrochemical reactions that cause rust.

Washing soda is hydrated sodium carbonate.
It is used for cleaning and softening water.

Electric current measures charge passing a point per unit time.
Its SI unit is the ampere.

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

Corrosion involves chemical or electrochemical reactions.
Rusting is a common example involving iron.

Bleaching powder releases chlorine-containing disinfecting agents.
It is used in water treatment and bleaching.

Voltage represents energy transferred per unit charge.
It drives current through a circuit.

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

Acids donate protons in chemical reactions.
In water, they increase hydrogen-ion concentration.

Chlorine in controlled amounts disinfects water.
It reduces disease-causing bacteria and viruses.

Resistance is measured in ohms.
It describes opposition to electric current.