FREE Master of Chemistry: Inorganic Chemistry Questions and Answers

Question 1

A metal and a chemical are combined to generate a coordination complex.

Accepted Answer

Ligand

Answer

In coordination chemistry, a ligand is a molecule or ion that binds to a central metal atom or ion to form a coordination complex. Ligands act as Lewis bases, donating one or more electron pairs to the metal center to form coordinate covalent bonds. This interaction is fundamental to the structure and reactivity of coordination compounds.

Question 2

A method of separating mixture components based on differences in their affinities for mobile and stationary phases is referred to as

Accepted Answer

Chromatography

Answer

Chromatography is a powerful analytical and preparative technique used to separate components of a mixture. It operates on the principle of differential partitioning, where components are separated based on their varying affinities for a stationary phase and a mobile phase. This difference in affinity causes components to travel at different rates, leading to their separation.

Question 3

In reality, alpha rays are

Accepted Answer

Helium nuclei

Answer

Alpha rays, also known as alpha particles, are a form of ionizing radiation emitted during radioactive decay. They are composed of two protons and two neutrons, which is identical to the nucleus of a helium-4 atom (He2+). Alpha particles carry a positive charge and have a relatively high mass compared to other forms of radiation.

Question 4

The substance is referred to as benzoin oxime.

Accepted Answer

Dioxime

Answer

Benzoin oxime is an organic compound derived from benzoin and hydroxylamine. It is classified as a dioxime because it contains two oxime functional groups. This compound is known for its chelating properties and is often employed in analytical chemistry, particularly for the gravimetric determination of metal ions like copper.

Question 5

Select the force or forces at play in chromatography.

Accepted Answer

All of them

Answer

Chromatography relies on a variety of intermolecular forces to achieve the separation of mixture components. These forces include electrostatic interactions (ionic attractions), hydrogen bonding, and London dispersion forces (a type of van der Waals force). The specific combination and strength of these interactions between the analytes and the stationary and mobile phases dictate the separation efficiency.

MChem Master of Chemistry Practice Test

MChem Master of Chemistry Practice Test

FREE Master of Chemistry: Inorganic Chemistry Questions and Answers