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

Which of the following base is used for cleaning and commonly known as lye?

  1. $Ca(OH) _2$
  2. $NaOH$
  3. $KOH$

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

A common base used for cleaning is sodium hydroxide, known commonly as lye or caustic soda. It is not to be taken internally, because it is highly damaging to human tissueparticularly the eyes. Lye appears in drain cleaners, such as Drano, and oven cleaners, such as Easy-Off, which make use of its ability to convert fats to water-soluble soap.

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

The reaction of the acid and the ________ produces carbon dioxide, which causes dough and batters to rise.

  1. baking soda

  2. washing soda

  3. sodium hydroxide

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

Baking soda, known by chemists both as sodium bicarbonate and sodium hydrogen carbonate, is another example of a base with multiple purposes. The reaction of the acid and the baking soda produces carbon dioxide, which causes dough and batters to rise.

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

Why bee strings are treated by alkaline solutions?

  1. Because it is basic in nature.

  2. Because it is acidic in nature.

  3. Because it is treatable by only alkaline solution.

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

The venom of a honey bee is acidic in nature. 


So, it's effects can be neutralised by bicarbonate of soda such a baking soda or an alkali (basic in nature). 

Hence the option B is correct.

Multiple choice chemistry medicinal chemistry antacids and antihistamines therapeutic action of different classes of drugs ph regulation of the stomach

Which of the following will not act as antacid?

  1. Sodium hydrogencarbonate

  2. Magnesium hydroxide

  3. Sodium carbonate

  4. Aluminium carbonate
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

An antacid is a substance which neutralises stomach acidity and is used to relieve heartburn, indigestion or an upset stomach.
Antacids contain alkaline ions that chemically neutralise stomach gastric acid, reducing damage and relieving pain.
Examples of antacids are-
Sodium hydrogencarbonate,Magnesium hydroxide,Aluminium carbonate,Aluminium hydroxide.

Sodium carbonate known as washing soda is quite alkaline in nature and has a horrid soapy taste. It is not very palatable and could burn the throat. Bicarbonate is much gentler and not as strongly alkaline, and therefor more palatable. Hence, it will not act as Antacid.

Multiple choice chemistry medicinal chemistry antacids and antihistamines therapeutic action of different classes of drugs ph regulation of the stomach

Milk of magnesia is used as:

  1. antichlor

  2. antacid

  3. antiseptic

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

Milk of magnesia consists of Magnesium hydroxide.

Antacid is a substance which neutralizes stomach acidity and used to relieve heatburn, indigestion. So, we use bases like Magnesium hydroxide or Sodium Carbonate.

Multiple choice chemistry medicinal chemistry antacids and antihistamines therapeutic action of different classes of drugs ph regulation of the stomach

Which of the following is not used as an antacid ? 

  1. Magnesium hydroxide

  2. Sodium carbonate

  3. Sodium bicarbonate

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

An antacid is a substance which neutralizes stomach acidity and is used to relieve heartburn, indigestion or an upset stomach.

Example- $Mg(OH) _2, Na _2CO _3, NaHCO _3$.
Aluminum phosphate is not used as an antacid.
Hence, the correct option is D.

Multiple choice chemistry medicinal chemistry antacids and antihistamines therapeutic action of different classes of drugs ph regulation of the stomach

Which of the following is a use of $Mg(OH) _2$?

  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 clothes.

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

$Mg(OH) _2$ is used as an antacid to neutralize the acidity in the stomach.

Multiple choice chemistry basic analytical techniques filtration and crystallisation other methods of separation separation techniques

When a mixture of common salt and ammonium chloride is heated, white fumes are liberated which change into a white deposit when cooked. What is this substance?

  1. Ammonium chloride

  2. Common salt (sodium chloride)

  3. A mixture of ammonium chloride and common salt

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

When a mixture of common salt and ammonium chloride is heated, white fumes are liberated which changes into a white deposit when cooked. This white substance is ammonium chloride. Salt and Ammonium chloride are separated by the method of sublimation.

Multiple choice chemistry basic analytical techniques filtration and crystallisation other methods of separation separation techniques

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 basic analytical techniques filtration and crystallisation other methods of separation separation techniques

During sublimation of ammonium chloride and salt mixture, _________ is the sublimate.

  1. salt

  2. sand

  3. ammonium chloride

  4. all of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Ammonium chloride changes directly from solid to gaseous state on heating. Hence, on heating ammonium chloride, it gets converted into white vapours. The gaseous form of ammonium chloride can be cooled easily to get a pure solid.

Multiple choice chemistry basic analytical techniques filtration and crystallisation other methods of separation separation techniques

What acts as a sublimate during sublimation of ammonium chloride and salt mixture?

  1. Salt

  2. Sand

  3. Ammonium chloride

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

Ammonium chloride changes directly from solid to gaseous state on heating. The gaseous form of ammonium chloride can be cooled easily to get a pure solid. Hence, it acts as a sublimate.

Multiple choice chemistry basic analytical techniques filtration and crystallisation other methods of separation separation techniques

When sodium chloride and ammonium chloride are dissolved in water and filtered, what is the residue?

  1. Sodium chloride

  2. Ammonium chloride

  3. Both A and B

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

Both common salt and ammonium chloride are white powdery substance and dissolve in water to  form a homogeneous mixture. On filtration, none of these will separate form the liquid.  A mixture of common salt and ammonium chloride can be separated by sublimation.

Multiple choice chemistry basic analytical techniques filtration and crystallisation other methods of separation separation techniques

What is observed when a mixture of common salt and ammonium chloride is heated?

  1. Solid common salt gets deposited on the cooler parts of the funnel, while solid ammonium chloride remains in the china dish

  2. Mixture of common salt and ammonium chloride turns into greenish crystals when allowed to cool

  3. Ammonium chloride is deposited on the cooler parts of the funnel and solid common salt remains in the china dish

  4. Droplets containing both common salt and ammonium chloride appear on the upper part of the funnel, while some molten mixture of common salt and ammonium chloride remains in the china dish
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Sublimation is the transition of a substance directly from the solid to the gas phase without passing through the intermediate liquid phase. Ammonium chloride, camphor, anthracene, napthalene can sublime but common salt cannot sublime. Ammonium chloride evaportaes and forms vapours which rise up the funnel and get deposited in the cooler parts of the funnel. Sodium chloride remains in the china dish as no reaction takes place.