Explanation

Ice (solid water) is formed from molecules held together by hydrogen bonds, making it a molecular solid.

Explanation

When an aldehyde is oxidized, it typically converts to a carboxylic acid.

This reaction involves the addition of an oxygen atom to the aldehyde, changing the carbonyl group (C=O) at the end of the carbon chain into a carboxyl group (–COOH).

Explanation

Benzene is the archetypical aromatic compound.

It is planar, bond angles=120º, all carbon atoms in the ring are sp2 hybridized, and the pi-orbitals are occupied by 6 electrons.

Explanation

When Cl₂ is removed, the equilibrium will favor the formation of PCl₅ to restore balance, shifting to the left to compensate for the change.

Explanation

Mayonnaise is primarily made by emulsifying oil (usually vegetable oil) in water (along with vinegar or lemon juice and egg yolk, which contains emulsifiers).

This creates a stable mixture of oil droplets dispersed in the water phase.

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

Lunar soil is composed mainly of silicate minerals, with silicon dioxide (SiO₂) being a significant component.

Other components include various metal oxides like Fe₂O₃ and MgO, but SiO₂ is prevalent in the overall composition.

Calcium carbonate (CaCO₃) and sodium chloride (NaCl) are not typically found in lunar soil.

Explanation

A) Hydrogen - Very low solubility in water, decreases with increasing temperature.

B) Oxygen - Solubility decreases with increasing temperature; however, it is more soluble than hydrogen.

C) Air - A mixture of gases (mostly nitrogen and oxygen); individual gases like oxygen can dissolve, but overall solubility is affected by temperature.

Correct Answer: B) Oxygen

Oxygen is more soluble in water than hydrogen, and although its solubility decreases with increasing temperature, it remains the most soluble option among those listed.

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

Electronegativity:- Due to the increase in the number of protons electronegativity increases left to right in a period.