Chemistry · Science General

Common Chemical Compounds and Reactions

1,204 Questions

Common chemical compounds and reactions questions test your knowledge of everyday chemicals, their formulas, and their interactions. Topics include properties of acids and bases, hard water chemistry, and compounds like baking soda and plaster of paris. This section is essential for general science preparation.

Acids and basesPlaster of parisHard water chemistryCommon chemical formulasEveryday chemical reactions

Common Chemical Compounds and Reactions Questions

Multiple choice

Which of the following is not a base?

  1. Sodium hydroxide

  2. Magnesium hydroxide

  3. Ammonium hydroxide

  4. Calcium carbonate

  5. Ferric oxide
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Copper carbonate is a salt because bases are oxides or hydroxides of metals, but a salt is a compound made up of an acid, when a metal takes the place of the hydrogen in the acid. Calcium carbonate is formed by the reactions of calcium and carbonic acid.

Multiple choice

CaSo₄ is named as

  1. calcium carbonate

  2. calcium hydroxide

  3. calcium oxide

  4. calcium sulphate
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

CaSO4 is the chemical formula for calcium sulfate. The subscript 4 indicates four oxygen atoms attached to the sulfur atom.

Multiple choice

Carborundum is used as ________.

  1. a fertilizer

  2. a paint

  3. a medicine

  4. an alkaline agent

  5. none of these
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Carborundum (silicon carbide) is primarily used as an abrasive, in ceramics, and in high-temperature heating elements. None of the listed options (fertilizer, paint, medicine, alkaline agent) accurately describe its primary industrial use.

Multiple choice

Benedict's solution is prepared by

  1. tri-butyl citrate

  2. ferric ammonium citrate

  3. sodium citrate

  4. potassium sodium tartrate

  5. succinic acid

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Sodium citrate is used in baby food to prevent the curdling of milk and is also used in the preparation of Benedict's solution.

Multiple choice

Which of the following is chemical formula of Gypsum?

  1. CaSO4.2H2O

  2. CaOCl2

  3. CaSO4.1/2H2O

  4. None of these.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Gypsum is chemically calcium sulfate dihydrate, represented by the formula CaSO4.2H2O. Option C represents Plaster of Paris, which is the hemihydrate.