Explanation

Explanation

• As you move left to right across a period, electronegativity increases.
• Nuclear charge increases — more protons pull more strongly on bonding electrons
• Atomic radius decreases — electrons are held closer to the nucleus
• Shielding stays roughly the same (electrons are added to the same shell), so the effective nuclear charge rises

Explanation

Adding NaCl to food can increase the boiling point of water, leading to a faster cooking process.

Additionally, salt helps to draw moisture out of food, which can also contribute to more efficient cooking.

Explanation

Hydrogen sulphide gas is a naturally occurring chemical.

The gas has a characteristic rotten egg odor at low concentrations.

Hydrogen sulphide gas (H 2 S) is a colorless gas

Hydrogen sulphide is produced by reacting a metal sulphide (Ferrous sulphide) with a dilute acid (Sulphuric acid).

The element responsible for the rotten egg-like smell of Hydrogen sulphide is Sulphur (S).

Explanation

Stainless steel is a alloys that contain a minimum of approximately 11% chromium, a composition that prevents the iron from rusting and also provides heat-resistant properties.

Explanation

Liquids that evaporate quickly are called volatile liquids

Volatility refers to the tendency of a liquid to vaporize or evaporate quickly, often at room temperature or below. 

Examples of volatile liquids include:

• Alcohol (e.g., ethanol, isopropanol)
• Acetone
• Gasoline
• Perfumes
• Essential oils

Explanation

Smoke is an example of solid in gas.

As it consists of tiny solid particles suspended in the air.

It is a gas.

Explanation

Acetic acid can be prepared by the hydrolysis of: Methyl cyanide
(Methyl cyanide, also known as acetonitrile, upon hydrolysis yields acetic acid.)

Explanation

Quaternary

(Haemoglobin has a quaternary structure as it consists of multiple polypeptide chains.)

Explanation

Competes with substrate

(In competitive inhibition, the inhibitor competes with the substrate for binding to the active site of the enzyme.)