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

Which of the following compounds is not used as an explosive?

  1. Ammonium permanganate

  2. Copper(I) acetylide

  3. Ammonium acetate

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

Ammonium acetate is a white solid, which can be derived from the reaction of ammonia and acetic acid. It is available commercially and depending on grade, can be rather inexpensive. It is not an explosive. NH4C2H3O2 is occasionally employed as a biodegradable de-icing agent.

Multiple choice

Which of the following explosives is used to trigger other explosives ?

  1. Nitrogen triiodide

  2. Nitrogen trichloride

  3. Mercury(II) fulminate

  4. Lead picrate
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Mercury(II) fulminate, Hg(CNO)2, is a primary explosive. It is highly sensitive to friction and shock. It is mainly used as a trigger for other explosives in percussion caps and blasting caps.

Multiple choice

Among the following, the hygroscopic compound is

  1. cerium(IV) sulfate

  2. chromic acid

  3. chromium(II) chloride

  4. chromium(III) oxide
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Chromium(II) chloride is the chemical compound with the formula CrCl2. This white, crystalline solid is used for the synthesis of other chromium complexes. CrCl2 is hygroscopic.It is used as a precursor to other inorganic and organometallic chromium complexes. Alkyl halides and nitroaromatics are reduced by CrCl2.

Multiple choice

Which among the following is a pseudohalogen?

  1. Copper(I) sulfide

  2. Copper monosulfide

  3. Cyanogen

  4. Cyanuric chloride
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Cyanogen is the chemical compound with the formula (CN)2. It is a colourless, toxic gas with a pungent odour. The molecule is a pseudohalogen. Cyanogen molecules consist of two CN groups — analogous to diatomic halogen molecules, such as Cl2, but far less oxidizing.

Multiple choice

Ethane is an organic compound. Which of the following is structurally similar to ethane?

  1. Digallane

  2. Dinitrogen pentoxide

  3. Disilane

  4. Disulfur dichloride
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Disilane is a chemical compound with chemical formula H6Si2. It is the only two silicon silane that is an aliphatic hydrosilicon. At standard temperature and pressure, disilane is a colourless, acrid gas. Disilane and ethane have similar structures, although disilane is much more reactive.

Multiple choice

The compound used for the preservation of stock solutions is

  1. hafnium(IV) chloride

  2. hexadecacarbonylhexarhodium

  3. hydrazine

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

Hydrazoic acid is a colourless, volatile, and extremely explosive liquid at room temperature and pressure. It is a compound of nitrogen and hydrogen, having chemical formula HN3.It is used primarily for preservation of stock solutions, and as a reagent.

Multiple choice

Which of the following is the component of fluoroantimonic acid?

  1. Stibine

  2. Antimony pentachloride

  3. Antimony pentafluoride

  4. Antimony trioxide
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Antimony pentafluoride is the inorganic compound with the formula SbF5. This colourless, viscous liquid is a valuable Lewis acid and a component of the superacid fluoroantimonic acid, the strongest known acid. It is notable for its Lewis acidity and its ability to react with almost all known compounds.

Multiple choice

Which of the following alums is used in tanning?

  1. Chrome alum

  2. Ammonium alum

  3. Soda alum

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

Chrome alum, KCr(SO4)2·12H2O is a dark violet crystalline double sulfate of chromium and potassium. It is used in tanning.

Multiple choice

Which of the following is a structural analogue of diethylene glycol?

  1. Diethylenetriamine

  2. Diethyl ether

  3. Difluoromethane

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

Diethylenetriamine (DETA) is a colourless hygroscopic liquid , soluble in water and polar organic solvents. It is a structural analogue of diethylene glycol. Its chemical properties resemble those of ethylene diamine, and it has similar uses. It is a weak base and its aqueous solution is alkaline.

Multiple choice

Which is used as a aerosol spray propellant?

  1. 1,4-Dichlorobenzene

  2. Dichlorodifluoromethane

  3. Dimethyldichlorosilane

  4. 1,2-Dichloroethane
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Dichlorodifluoromethane is a chlorofluorocarbon halomethane (CFC), used as a refrigerant and aerosol spray propellant.