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 thermodynamic principles of metallurgy general principles and processes of isolation of elements metallurgy chemistry

Name the substance which remains in a test tube after heating ferrous sulphate.

  1. $Fe _2O _3$
  2. $Fe _2S$
  3. $Fe _2(SO _4) _3$

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

Heating farrow sulfate in a test tube following reaction takes place

$FeSO _4.7H _2O\rightarrow Fe SO _4+7H _2O$
$2Fe SO _4\rightarrow Fe _2O _3+SO _2+SO _3$
Both $SO _2$ and $SO _3$ are gases that colorless and evolved out 
Only $Fe _2O _3$  that is ferric oxide which reddish brown in colour remained in the fort tube ,so the answer is $Fe _2O _3$ that is ferric oxide

Multiple choice chemistry nitrogen and sulfur ammonia and fertilizers preparation of ammonia-laboratory method and haber's process ammonia

Urea is prepared by the chemical reaction of:

  1. acetamide and ethyl alcochol

  2. ammonium sulphate and calcium chloride

  3. ammonia and Carbon dioxide

  4. chlorine and water
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
The chemical formula of urea is $H _2N-CO-NH _2$
Urea is now prepared commercially in vast amounts from liquid ammonia and liquid carbon dioxide.
Multiple choice

What is the main ingredient in gypsum plaster?

  1. Calcium Sulfate

  2. Sand

  3. Lime

  4. Cement

  5. Water
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Calcium sulfate is the main ingredient in gypsum plaster. It is a naturally occurring mineral that is also known as gypsum.

Multiple choice

What is the main ingredient in plaster of Paris?

  1. Calcium Sulfate

  2. Sand

  3. Lime

  4. Cement

  5. Water
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Calcium sulfate is the main ingredient in plaster of Paris. It is a naturally occurring mineral that is also known as gypsum.

Multiple choice

What is the name of the compound with the formula $NaCl$?

  1. Sodium chloride

  2. Potassium chloride

  3. Calcium chloride

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

The compound with the formula $NaCl$ is called sodium chloride, also known as common salt.

Multiple choice

Which element is responsible for the formation of sea salt?

  1. Sodium

  2. Chlorine

  3. Magnesium

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

Sodium is the dominant element in sea salt, accounting for approximately 30% of its composition.

Multiple choice

Which agent is responsible for the rising of bread dough?

  1. Baking Powder

  2. Yeast

  3. Baking Soda

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

Yeast, a type of fungus, consumes sugars in the dough and releases carbon dioxide, causing the dough to rise.

Multiple choice

What is the chemical formula for sodium chloride?

  1. NaCl

  2. Na2Cl

  3. NaCl2

  4. Na3Cl
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Sodium chloride is a compound composed of sodium and chlorine atoms. The chemical formula for sodium chloride is NaCl, which indicates that there is one sodium atom and one chlorine atom in each molecule.

Multiple choice

Which of the following is a covalent compound?

  1. Sodium chloride

  2. Carbon dioxide

  3. Water

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

A covalent compound is a compound in which the atoms are held together by covalent bonds. Carbon dioxide is a covalent compound because the carbon and oxygen atoms are held together by covalent bonds.

Multiple choice

What is the chemical formula for sodium hydroxide?

  1. NaOH

  2. Na2OH

  3. Na3OH

  4. Na4OH
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Sodium hydroxide is a compound composed of sodium, hydrogen, and oxygen atoms. The chemical formula for sodium hydroxide is NaOH, which indicates that there is one sodium atom, one hydrogen atom, and one oxygen atom in each molecule.