AS Associate Of Science In Chemistry 2

Question 1

In which type of reaction do two or more substances combine to form a single product?

Accepted Answer

Synthesis (combination) reaction

Answer

A synthesis (combination) reaction occurs when two or more reactants combine to form one product, represented as A + B → AB.

Question 2

What is the name of the model that describes electrons occupying specific energy levels around the nucleus?

Accepted Answer

Bohr model

Answer

The Bohr model proposes that electrons orbit the nucleus in fixed energy levels (shells) and can jump between levels by absorbing or emitting energy.

Question 3

What is molarity (M) defined as in chemistry?

Accepted Answer

Moles of solute per liter of solution

Answer

Molarity (M) is the concentration unit defined as the number of moles of solute dissolved per liter of solution.

Question 4

Which element is found in all organic compounds?

Accepted Answer

Carbon

Answer

Carbon is the defining element of organic chemistry; all organic compounds contain carbon atoms, usually bonded to hydrogen.

Question 5

What is the oxidation state of oxygen in most compounds?

Accepted Answer

−2

Answer

Oxygen typically has an oxidation state of −2 in most compounds, except in peroxides (−1) and when bonded to fluorine (+2).

AS - Associate In Science Degrees Practice Test