Chemistry ยท 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

The chemical name of slaked lime is _____________.

  1. calcium carbonate

  2. calcium hydroxide

  3. calcium oxide

  4. calcium Sulphate
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Slaked lime is the common name for calcium hydroxide, Ca(OH)2. It is produced by adding water to quicklime (calcium oxide).

Multiple choice

The chemical name of silica is _____________.

  1. silicon oxide

  2. silicon dioxide

  3. silicon carbonate

  4. silicon bicarbonate
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Silica is the common name for silicon dioxide, SiO2. It is the primary component of sand and quartz.

Multiple choice

The chemical name of soda ash is _____________.

  1. sodium oxide

  2. sodium carbonate

  3. sodium silicate

  4. silicon bicarbonate
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Soda ash is the common name for anhydrous sodium carbonate, Na2CO3. It is widely used in glass manufacturing and as a water softener.

Multiple choice

The chemical name of limestone is _____________.

  1. calcium carbonate

  2. calcium hydroxide

  3. calcium oxide

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

Limestone is a sedimentary rock composed primarily of calcium carbonate, CaCO3. It is widely used in construction and as a chemical feedstock.

Multiple choice

The chemical name of gypsum salt is

  1. calcium carbonate

  2. calcium hydroxide

  3. calcium oxide

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

Gypsum is the common name for calcium sulphate dihydrate, CaSO4.2H2O. It is frequently used in construction materials like plaster of Paris.

Multiple choice

The chemical name of saltpeter is _____________.

  1. ferrous sulphate

  2. copper sulphate

  3. magnesium sulphate

  4. potassium nitrate
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Saltpeter (or saltpetre) is the common name for potassium nitrate, KNO3. It has historically been used in gunpowder and fertilizers.

Multiple choice

The chemical name of soda water is _____________.

  1. carbonic acid

  2. hydrochloric acid

  3. acetic acid

  4. lactic acid
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Soda water is water into which carbon dioxide gas has been dissolved under pressure, forming a weak solution of carbonic acid, H2CO3.

Multiple choice

The chemical name of common salt is _____________.

  1. sodium carbonate

  2. sodium bicarbonate

  3. sodium chloride

  4. sodium sulphate
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Common salt is the name for sodium chloride, NaCl. It is the primary salt found in seawater and is essential for human health.

Multiple choice

The chemical name of smelling salt is _____________.

  1. ammonium carbonate

  2. ammonium hydroxide

  3. ammonium chloride

  4. ammonium sulphate
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Smelling salts are typically composed of ammonium carbonate, (NH4)2CO3. When inhaled, the ammonia gas released stimulates the respiratory system.

Multiple choice

The chemical name of Epsom salt is _____________.

  1. ferrous sulphate

  2. copper sulphate

  3. magnesium sulphate

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

Epsom salt is the common name for magnesium sulphate heptahydrate, MgSO4.7H2O. It is often used in baths for muscle relaxation.

Multiple choice

The chemical name of marble is _____________.

  1. calcium carbonate

  2. calcium hydroxide

  3. calcium oxide

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

Marble is a metamorphic rock composed of recrystallized carbonate minerals, most commonly calcite or dolomite, which are forms of calcium carbonate, CaCO3.

Multiple choice

The chemical name of caustic soda is _____________.

  1. sodium carbonate

  2. sodium hydroxide

  3. sodium chloride

  4. sodium sulphate
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Caustic soda is the common name for sodium hydroxide, NaOH. It is a highly alkaline substance used in many industrial processes.

Multiple choice

Why sodium is kept under kerosene?

  1. It remains fresh.

  2. It is protected from evaporation.

  3. Sodium reacts with moist air and changes into sodium hydroxide.

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

Sodium is a highly reactive alkali metal. It reacts vigorously with oxygen and moisture in the air to form sodium hydroxide and hydrogen gas, so it is stored in kerosene to prevent contact with air and water.