Chemistry · Science General

Common Chemical Compounds and Reactions

1,197 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

Flint glass contains

  1. lead oxide

  2. manganese dioxide

  3. lead dioxide

  4. cobalt chloride
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Flint glass has high refractive index and high dispersion. It contains mainly lead oxide.

Multiple choice

Hard glass is prepared by

  1. fusing a mixture of sodium carbonate, calcium carbonate and silica

  2. fusing a mixture of potassium carbonate, calcium carbonate and silica

  3. fusing a mixture of potassium carbonate and any oxide

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

Hard glass is prepared by fusing a mixture of potassium carbonate, calcium carbonate and silica.

Multiple choice

‘Saponification’ is a process by which ___________.

  1. soap is prepared

  2. plastic is prepared

  3. sulphur is extracted

  4. protein is identified

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

The term saponification is the name given to the chemical reaction that occurs when a vegetable oil or animal fat is mixed with a strong alkali. The products of the reaction are two: soap and glycerin. Water is also present, but it does not enter into the chemical reaction. The water is only a vehicle for the alkali, which is otherwise a dry powder. The name saponification literally means "soap making". The root word, "sapo", is Latin for soap. The Italian word for soap is sapone. 

Multiple choice

What is aqua regia?

  1. Mixture of 1 part of concentrated HCl and 3 part of concentrated HNO3.

  2. Mixture of 3 part of concentrated HCl and 1 part of concentrated HNO3.

  3. Mixture of 1 part of dilute HCl and 3 part of concentrated HNO3.

  4. Mixture of 3 part of concentrated HCl and 1 part of dilute HNO3.

  5. Mixture of 1 part of dilute HCl and 3 part of dilute HNO3.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

 Mixture of 3 part of concentrated HCl and 1 part of concentrated HNO3.

Multiple choice

The capacity of a saturated salt solution can be increased by

  1. heating the solution

  2. cooling the solution

  3. adding more salt

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

If we keep on adding a substance to water then a state arrives, when no more solute can be dissolved in it. Such a solution is said to be saturated, though more solute in the same can be dissolved by heating the solution. 

Multiple choice

How would you differentiate between chalk powder and salt without tasting them?

  1. By dissolving them in water

  2. By observing the size of particles

  3. By sieving

  4. By heating
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Chalk powder is insoluble and salt is soluble in water. So, we will dissolve both the substances in separate test tubes. The one which gets dissolved will be salt and the other which is insoluble is chalk powder. 

Multiple choice

The anticoagulant of fresh water leech is

  1. hirudin

  2. heparin

  3. sodium citrate

  4. chelating agent
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Hirudin is the specific anticoagulant produced by medicinal leeches (Hirudo medicinalis) to prevent blood clotting while they feed. Heparin is produced by mast cells and basophils in mammals, not leeches. Sodium citrate is an artificial anticoagulant used in laboratory settings, not a natural leech product.

Multiple choice

Which of the following is INCORRECT about salt production?

  1. Chemical name of salt is Sodium Chloride.

  2. Gujarat accounts for around 70% production of salt.

  3. Sambhar lake of Rajasthan is also a major source of salt production and contributes around 10%.

  4. India is a net exporter of Salt.

  5. Salt is also obtained from rocks other than sea coast.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Gujarat accounts for 50% of total production of salt

Multiple choice

Which of the following is manufactured by Solvey's process?

  1. Na2CO3

  2. NaOH

  3. CaOCl2

  4. NH3
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The Solvay process (or Solvey process) is primarily used for the industrial manufacture of sodium carbonate (Na₂CO₃, soda ash). This involves the reaction of sodium chloride with ammonia and carbon dioxide to form sodium bicarbonate, which is then heated to produce sodium carbonate. NaOH is typically produced by electrolysis, CaOCl₂ (bleaching powder) from chlorine and lime, and NH₃ by Haber process.