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

What cause the hardness of water?

  1. Presence of germs and impurities

  2. Presence of more calcium and magnesium ions

  3. Presence of sodium ions

  4. All of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Yes, it is correct. Excess of calcium and magnesium ions causes water to be hard.

Multiple choice

Which of the following is a mixture?

  1. Potassium carbonate

  2. Potassium carbonate solution Right!

  3. Potassium

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

Potassium carbonate solution is a mixture. Potassium is an element. Potassium carbonate is a compound.

Multiple choice

Raphides are crystals of

  1. calcium carbonate

  2. calcium oxalate

  3. magnesium carbonate

  4. magnesium oxalate

  5. -
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Correct Answer: calcium oxalate

Multiple choice

The setting & hardening of cement after addition of water is due to

  1. The presence of gypsum

  2. Binding action of water

  3. Hydration of some of the constituent compound of cement

  4. Evaporation of water

  5. Due to presence lime.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Setting and hardening occurs due to formation of Bogue's compounds Dicalcium silicate, Tricalcium silicate and tricalcium aluminate.

Multiple choice

Sodium phosphate

  1. makes water alkaline

  2. removes Ca�⁺ and Mg�⁺ ion

  3. known as a booster

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

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Multiple choice

Gypsum is

  1. CaSO4H2O

  2. CaSO4. 2H2O

  3. CaSO4.½H2O

  4. CaCl2
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

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