Explanation

Sodium chloride (NaCl) dissolves in water because it is an ionic compound that dissociates into ions.

Water molecules surround and separate the sodium and chloride ions, allowing it to dissolve.

Explanation

In the Fahrenheit scale:

• The freezing point of water is 32°F
• The boiling point of water is 212°F

Explanation

Potassium permanganate (KMnO₄) gives a pink to purple color when dissolved in water, depending on the concentration.

It is commonly used as a disinfectant and in redox reactions.

Explanation

An atom is the smallest unit of matter that retains the properties of an element.

It consists of subatomic particles like electrons, protons, and neutrons.

Explanation

In an endothermic reaction, energy is absorbed, so the products have more energy than the reactants.

This results in a temperature drop in the surroundings.

Explanation

Bleaching powder is synthesized by reacting chlorine gas with calcium hydroxide (Ca(OH)₂).

The chemical formula of bleaching powder is Ca(OCl)Cl.

Explanation

Reactivity is a chemical property that describes how easily a substance undergoes chemical change.

It indicates how a substance reacts with others to form new substances.

Explanation

Heavy water, also known as Deuterium Oxide (D₂O).

It is used as a neutron moderator in nuclear reactors.

Due to its ability to slow down neutrons without absorbing them.

Explanation

Explanation

 Its chemical formula is CuO.

It contains copper and oxygen atoms in a ratio of 1:1.