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

Gold is soluble in

  1. hydrochloric acid

  2. hydrogen fluoride

  3. hydrogen bromide

  4. aqua regia
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Gold is soluble in aqua regia, which is a mixture formed by freshly mixing concentrated nitric acid and hydrochloric acid.

Multiple choice

Heavy water is

  1. D2O

  2. H2O along with Ca, Mg, carbonate

  3. H2O2

  4. Sea water (H2O + Salt)
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

D2O is known as heavy water.

Multiple choice

What is the chemical name of Litharge?

  1. Sodium sulphate

  2. Iron sulphate

  3. Calcium sulphate

  4. Lead sulphate

  5. Magnesium sulphate
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This is the correct answer because lead sulphate is the chemical name of litharge and galena.

Multiple choice

Choose the odd one.

  1. Sugar

  2. Salt

  3. Chalk powder

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

Oil is insoluble in water whereas all three i.e. sugar, salt and chalk powder are soluble in water.

Multiple choice

How can the blood spills in the hospital be disinfected?

  1. With quaternary ammonium compounds

  2. By sodium hypochlorite

  3. By plain soap and water

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

Steps to disinfect blood spills: Disposable towels or wipes should be used to wine up the spill by gloved hands. Diluted bleach (sodium hypochlorite) solution is then used to disinfect the area. If blood is not wiped properly by towel, then disinfectant will not act.

Multiple choice

Which of the following statements is false?

  1. White phosphorus shows chemiluminescence.

  2. Mixture of Ca(CN)2 and coke is called nitrolim.

  3. NO2 is called mixed hydride.

  4. Ammonium chloride is known as smelling salt.

  5. Chemical formula of Bengal salt petre is KNO3.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Ammonium carbonate, (NH4)2CO3, is called as smelling salt.

Multiple choice

Consider the following statements:

  1. When steam is passed over red-hot coke, CNG is produced.
  2. Potassium permanganate (pink solution) acts an antiseptic solution.

Which of the given statements is/are correct?

  1. Only 1

  2. Only 2

  3. Both 1 and 2

  4. Neither 1 nor 2
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Statement 1 is incorrect. When steam is passed over red-hot coke, water gas is produced. Compressed natural gas (CNG) is natural gas under pressure. Statement 2 is correct. Potassium permanganate (pink solution) is an oxidizing agent so it is an antiseptic solution.