Learn more about the properties, composition, and structure of substances (elements and compounds) with these Chemistry questions and answers. This Test can be used by students preparing for Chemistry in JAMB, WAEC, NECO or Post UTME.
The compounds made up of only carbon and hydrogen are called?
Carbon compounds
Hydrocarbons
Atoms
Carbon hydrolysis
Correct answer is B
A hydrocarbon is any of a class of organic chemicals made up of only the elements carbon (C) and hydrogen (H).
Classes are Aliphatic and Aromatic Hydrocarbons.
Natural sources are coal, natural gas and petroleum.
The process or act of extracting a metal from its ore and refining it is called?
Extraction
Metal mining
Mettallurgy
Prospecting
Correct answer is C
Metallurgy, art and science of extracting metals from their ores and modifying the metals for use.
A binary compound of oxygen with another element is referred to as?
Oxide
Element
Carbon
Nitrogen
Correct answer is A
An oxide is a chemical compound that contains at least one oxygen atom and one other element in its chemical formula.
The reactions involving simultaneous oxidation and reduction?
Automatic reactions
Alternate reactions
Reduction agency
Redox reactions
Correct answer is D
Redox (reduction/oxidation) describes all chemical reactions in which atoms have an increase or decrease in oxidation number (oxidation state).
A chemical process in which there is a gain of electrons is known as?
Sublimation
Reduction
Oxidation
Distillation
Correct answer is B
Reduction, any of a class of chemical reactions in which the number of electrons associated with an atom or a group of atoms is increased.