Explanation

Coagulation helps neutralize the charges on particles so they can stick together.

Flocculation follows, where these particles clump into larger flocs for easy removal—both are key in water purification.

Explanation

The atomic number of silver (Ag) is 47. Its electronic configuration is [Kr] 4d¹⁰ 5s¹.

The valence electrons are in the outermost shell, which is the 5s orbital with 1 electron.

The number of valence electrons is 1.

Explanation

Paracetamol (also known as acetaminophen) is a pain-relieving and fever-reducing drug.

It is classified as an analgesic.

Explanation

Symbol of mercury: Hg

Atomic number: 80

Boiling Point: 356.7 C

Explanation

Ozone (O3) is a gas found in the stratosphere.

A stratosphere layer of the atmosphere that extends from about 12 to 50 kilometers (7.5 to 31 miles) above the Earth's surface.

The ozone layer, also known as the ozonosphere.

Explanation

In a zero-order reaction, the rate of reaction is independent of the concentration of the reactants. 

The rate of the reaction is equal to the rate constant 𝑘

Explanation

pOH is defined as the negative logarithm of the hydroxide ion concentration: pOH = -log[OH⁻].

It is used to measure the basicity of a solution, similar to how pH measures acidity.

Explanation

Molar mass of CO₂ = 12 (C) + 16×2 (O) = 44 g/mol

Number of moles = Mass / Molar mass = 60 / 44 ≈ 1.364 mol

Explanation

Nascent hydrogen refers to atomic hydrogen (H), which is highly reactive and short-lived.

It is usually produced in situ during chemical reactions.

It is more reactive than molecular hydrogen (H₂).

Explanation

In a balanced chemical equation, the law of conservation of mass states that atoms are neither created nor destroyed.

So, the number of atoms of each element on the reactant side is always equal to that on the product side.