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 chemistry chemistry in daily life food spoilage and food preservation methods of preserving food chemicals in food

On treating roll sulphur with an aqueous solution of calcium hydroxide :

  1. plastic sulphur is prepared

  2. milk of sulphur is prepared

  3. rhombic sulphur is prepared

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

When sublimed sulfur is boiled with lime water ,the lime is removed from the precipitate by washing with dil. $ HCl $; this is known as milk of sulphur and is used for treatment of various skin orders.

Multiple choice chemistry separation of matter crystals and crystallisation filtration and crystallisation other methods of separation

The method by which common salt is obtained from concentrated seawater is called:

  1. Crystallisation

  2. Catalyst

  3. Hydrolysis

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

The method by which common salt is obtained from concentrated seawater is called crystallisation.


Crystallisation is a technique used to separate a solid from a solution. The solid is more soluble at a higher temperature and less soluble at a lower temperature.

Hence, option A is correct.

Multiple choice chemistry basic analytical techniques partition coefficients solvent extraction separation methods

A vendor sells white powdered salt mixed with white powdered stone. The knowledge of which property will help you detect this malpractice?

  1. Ductility

  2. Opacity

  3. Density

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

The purity of the solid salt sample can be anaylsed simply by checking its solubility in proper solvent,

choose a proper solvent and add a pinch of compound to it, if the compound is completely soluble that means compound is pure.

Multiple choice chemistry introduction to acid and base neutralisations in everyday life acids and bases in daily life neutralisation reaction

Calcium hydroxide (slaked lime) is used in :

  1. plastics and dyes

  2. fertilizers

  3. antacids

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

Calcium hydroxide called slaked lime is an inorganic compound. It is a colorless crystal and is obtained when calcium oxide is mixed with water. It is used in preparation of dry mixes for painting and white washing.

Multiple choice chemistry introduction to acid and base neutralisations in everyday life acids and bases in daily life neutralisation reaction

Caustic soda is the common name for:

  1. $\displaystyle { Mg\left( OH \right) } _{ 2 }$
  2. $\displaystyle KOH$
  3. $\displaystyle { Ca\left( OH \right) } _{ 2 }$
  4. $\displaystyle NaOH$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Caustic soda is sodium hydroxide which is a strong base and so it has high basicity value on $pH$ scale. It is widely used in acid-base titrations to neutralize various strong or weak acids like sulfuric acid.


Hence, the correct option is $\text{D}$

Multiple choice chemistry introduction to acid and base neutralisations in everyday life acids and bases in daily life neutralisation reaction

Soda water contains :

  1. carbonic acid

  2. sulphuric acid

  3. carboxylic acid

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

Soda water is carbonated water. It contains water into which carbon dioxide gas under pressure has been dissolved. It is carbonic acid. The vast majority of carbonated water is sold in drink bottles as soft drinks and beverages.

Multiple choice chemistry introduction to acid and base neutralisations in everyday life acids and bases in daily life neutralisation reaction

Milk of magnesia is an:

  1. acid

  2. antacid

  3. alkali

  4. rock salt
Reveal answer Fill a bubble to check yourself
B,C Correct answer
Explanation

Milk of magnesia is $Mg(OH) _2$, it is an alkali.

Antacid is those compounds which completely neutralizes an acid.
For example: $\underbrace{Mg(OH) _2} _{Base}+\underbrace{H _2SO _4} _{Acid}\longrightarrow  \underbrace{MgSO _4} _{Neutral\ salt}+H _2O$
Thus, milk of magnesia is also an antacid.

Multiple choice chemistry introduction to acid and base neutralisations in everyday life acids and bases in daily life neutralisation reaction

Which of the following is a use of $Al(OH) _3$?

  1. It is used in fire extinguisher as a foaming agent

  2. It is used in the preparation of fertilizers

  3. It is used in removing stains of grease from cloths

  4. It is used as an antacid
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

$Al(OH) _3$ is used in fire extinguisher as a foaming agent.

Multiple choice chemistry introduction to acid and base neutralisations in everyday life acids and bases in daily life neutralisation reaction

Which of the following is a use of sodium hydroxide?

  1. It is used in the manufacture of soaps, paper.

  2. It is used in the manufacture of synthetic fibers like rayon.

  3. It is important constituent in drain cleaners.

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

Sodium hydroxide is used in the manufacture of soaps, paper; in the manufacture of synthetic fibers like rayon and is important constituent in drain cleaners.


Hence option D is correct

Multiple choice chemistry introduction to acid and base neutralisations in everyday life acids and bases in daily life neutralisation reaction

$X$ is used in the manufacture of $Y$ which is used as a disinfectant. What are $X$ and $Y$?

  1. Ammonium hydroxide, Ammonium phosphate

  2. Sodium hydroxide, Rayon

  3. Calcium hydroxide, Bleaching powder

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Calcium hydroxide- $Ca(OH) _2$ is used in the manufacture of bleaching powder. Bleaching powder is used as a disinfectant.