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

The antacid is called

  1. milk of mango

  2. milk of magnesia

  3. milk of pineapple

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

The antacid is called milk of magnesia. Magnesium hydroxide is an inorganic compound with the chemical formula Mg(OH)2. As a suspension in water, it is often called milk of magnesia because of its milk-like appearance. The solid mineral form of magnesium hydroxide is known as brucite. Magnesium hydroxide is a common component of antacids and laxatives; it interferes with the absorption of folic acid and iron. Magnesium hydroxide has low solubility in water, with a Ksp of 1.5 x 10−11; all of magnesium hydroxide that does dissolve does dissociate. Since the dissociation of this small amount of dissolved magnesium hydroxide is complete, magnesium hydroxide is considered a strong electrolyte.

Multiple choice

Hypo, used in photography is chemically

  1. Sodium bicarbonate

  2. Sodium thiosulphate

  3. Sodium nitrate

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

In photography, hypo is a chemical used as a fixing agent to dissolve unexposed silver halides from photographic film or paper. Chemically, it is sodium thiosulphate.

Multiple choice

Curdy white precipitates formed, when soap solution is used with hard water, is due to

  1. calsium and magnesium ions present in hard water.

  2. potassium and sodium ions present in hard water.

  3. calcium and sodium ions present in hard water.

  4. magnesium and potassium ions present in hard water.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Hard water contains calcium and magnesium ions. When soap is used with hard water, these ions react with soap to form insoluble calcium and magnesium salts of fatty acids, appearing as curdy white precipitates.

Multiple choice

Raw material required for the preparation of soap is

  1. vegetable oil.

  2. sodium hydroxide.

  3. sodium chloride.

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Soap is made by saponification, which requires vegetable oil (or animal fat) and a strong base like sodium hydroxide. Sodium chloride is used to salt out the soap from the solution.

Multiple choice

Which of the following is a fertiliser?

  1. Sodium peroxide

  2. Sodium carbonate

  3. Sodium thiosulphate

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

Sodium nitrate is the chemical compound. Sodium nitrate is used as a constituent of fertilizers.