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Chemistry Questions and Answers

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.

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856.

The principle of column chromatography is based on th ability of the constituents to

React with the solvent in the column

React with each other in the solvent in the column

Dissolve in each other in the column

Move at different speeds in the column

View answer & explanation

Correct answer is D

No explanation has been provided for this answer.

857.

The monomer of nylon is

Hydroxybenzene

Hexanedioic acid

Benzene -1,-4-dicarboxylic acid

Ethane-1,2-diol

View answer & explanation

Correct answer is B

No explanation has been provided for this answer.

858.

In the laboratory preparation of chlorine from concentrated hydrochloric acid in the presence of potassuim tetraoxomanganate(VII) the produced is dried by passing it through

Concentrated tetraoxosulphate (VI) acid

Anhydrous calcium chloride

Calcium oxide

Sodium hydroxide

View answer & explanation

Correct answer is A

No explanation has been provided for this answer.

859.

The enzyme used in the hydrolysis of starch to dextrin and maltose is

Zymase

Sucrase

Amylase

Lactase

View answer & explanation

Correct answer is C

No explanation has been provided for this answer.

860.

An endothermic reaction is one during which heat is.....and can be represented by the symbol.... which of the following combinations can be used accurately to complete the above definition?

liberated, - $\Delta$ H

liberated, + $\Delta$ H

absorbed, - $\Delta$ H

absorbed, + $\Delta$ H

absorbed, + $\Delta$ G

View answer & explanation

Correct answer is D

No explanation has been provided for this answer.

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