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

The chemical name of common salt is

  1. sodium chloride

  2. sodium nitrate

  3. ammonium chloride

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

Common salt is chemically known as sodium chloride (NaCl).

Multiple choice

Chemical name of marble is _______.

  1. Calcium Carbonate

  2. Ammonium Carbonate

  3. Calcium Sulphate

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

Marble is a metamorphic rock composed primarily of recrystallized calcium carbonate. Its chemical formula is CaCO3.

Multiple choice

_______ is the chemical name of Plaster of Paris.

  1. Calcium Carbonate

  2. Ammonium Carbonate

  3. Calcium Sulphate

  4. Calcium Chloride
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Plaster of Paris is a quick-setting gypsum plaster consisting of a fine white powder, which is calcium sulfate hemihydrate. It is produced by heating gypsum.

Multiple choice

A salt containing water of crystallisation is called

  1. hydrous salt

  2. anhydrous salt

  3. neutral salt

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

When certain salts form crystals with a definite number of molecules of water, they chemically combine to do so in a definite proportion. A salt containing water of crystallisation is called a hydrous salt or a hydrate. This water can be expelled out also.e.g.CaCl2, 6H2O,Na2CO3, 10 H2O etc.

Multiple choice

Which of the following is not used as a drying agent?

  1. Conc H2SO4

  2. Solid NaCl

  3. Anhy CaCl2

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

Solid NaCl is a norml salt. Salts which produce one simple cation and one simple anion in aqueous solution  are called normal salts.The ions present in simple salt can be tested easily.

Multiple choice

Which of the following is not an example of hygroscopic subatance?

  1. solid NaOH

  2. conc H2SO4

  3. Zn(NO3)2

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

Certain hygroscopic substances, not only absorb moisture from the air, but also dissolve themselves in that moisture, undergoing a change of state. Such substances are called deliquescent substances. The process is called Deliquescence.It is a deliquescent substance.

Multiple choice

Magnesia alba is obtained by the addition of ____________.

  1. MgCO3 and MgSO4.7H2O

  2. CaCO3 and H2O

  3. AgCl and HNO3

  4. MgCl2 and MgO

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

This option is correct. Magnesia alba is a white substance, which is used in medicine as an antacid laxative and tooth powder, which is formulated as [Mg(CO3)x.Mg(OH)2]y.ZH2O. 

Multiple choice

Permanent hardness of water can be removed by _____________.

  1. sodium sulphate

  2. sodium bicarbonate

  3. washing soda

  4. sodium chloride

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

This option is correct because washing soda removes the permanent hardness by converting soluble calcium and magnesium compound into insoluble carbonates.

Multiple choice

Which of the following statement is true?

  1. Detergents can not form lather with ice cold water

  2. sodium salt of fatty acids are soft to skin than Potassium salts

  3. Cetyl trimethyl ammonium bromide (CTAB) is used in hair conditioners

  4. All statements are wrong
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

 This is true statement as Cetyl trimethyl ammonium bromide (CTAB) is used in hair conditioners. So the given option is correct.