Explanation

The K orbit, also known as the first electron shell.

• It can hold a maximum of 2 electrons.

The L orbit, also known as the second electron shell.

• It can hold a maximum of 8 electrons.

The M orbit, also known as the third electron shell.

• It can hold a maximum of 18 electrons.

Explanation

An alkali is a base that dissolves in water to give hydroxide (OH⁻) ions.

Common examples include sodium hydroxide (NaOH) and potassium hydroxide (KOH).

Explanation

A solution is a homogeneous mixture where one substance (solute) is completely dissolved in another (solvent).

Sea water: A true solution where salts (like NaCl) are completely dissolved in water.

Explanation

In a suspension, the solute particles are large enough to be seen with the naked eye and are not completely dissolved in the solvent.

The solute particles can eventually settle at the bottom if left undisturbed.

Explanation

Aluminum, Gold, and Graphite are conductors.

1. Aluminum is a metal that conducts electricity and heat.
2. Gold is an excellent conductor of electricity and heat.
3. Graphite is a form of carbon that conducts electricity. 

Explanation

Helium  and Argon is a noble gas, part of Group 18 in the periodic table.

Helium (He)

The lightest noble gas, helium is used in hot air balloons and airships.

It's also used in air containers for deep-sea divers.

Argon (Ar)

Argon makes up 0.93% of the Earth's atmosphere.

It can be prepared by fractional distillation of liquid air.

Explanation

Fehling's test is used to identify aldehydes by producing a red precipitate.

Aldehydes reduce Fehling’s solution, unlike ketones.

Explanation

Explanation

3-Hexanone is a ketone, and on oxidative cleavage with KMnO₄/H₂SO₄, it splits at the carbonyl group.

The cleavage yields acetic acid (CH₃COOH) and butanoic acid (CH₃CH₂CH₂COOH).

Explanation

1. Sodium (Na)
2. Hydrogen (H)
3. Carbon (C)
4. Oxygen (O)