Explanation

In voltammetry, diffusion current is measured as a function of scanning potential difference.

Explanation

As we move down Group 17 (halogens), the melting point increases due to greater molecular mass and stronger van der Waals forces.

For example: Fluorine < Chlorine < Bromine < Iodine in melting points.

Explanation

The specific gravity of fat is typically around 0.93 kg/litre at 25°C.

This means that fat is less dense than water, which has a specific gravity of 1.0 kg/litre at the same temperature. 

Explanation

There are 3 main states of matter:

• Solid (fixed shape and volume)
• Liquid (fixed volume, but takes shape of container)
• Gas (neither fixed shape nor fixed volume)

Explanation

The value of absolute zero is -273°C.

It is the theoretical temperature where all molecular motion stops.

It is equivalent to 0 Kelvin in the Kelvin temperature scale.

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

Explanation

• Sublimation is the transition of a substance from the solid to the gas phase without going through the liquid phase.
• This means that a solid changes directly into a gas, without first melting into a liquid.

Explanation

• Distillation is a process that involves boiling a liquid and then collecting the condensed steam.
• Which is free from many impurities, resulting in a purified liquid.
• This process is commonly used to purify water, alcohol, and other liquids.