Chemistry ยท 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 one is strong base.

  1. ammonium hydroxide

  2. iron hydroxide

  3. Sodium hydroxide
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Sodium hydroxide (NaOH) is a strong base, whereas ammonium hydroxide and iron hydroxide are considered weak bases.

Multiple choice

Bases are also known as

  1. Alkali mixture

  2. Alkaline earth solution

  3. alkali solution

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

In chemistry, bases are often referred to as alkalis, especially when they are soluble in water. While 'alkali solution' describes a state, 'Alkali' is the standard term for a basic substance.

Multiple choice

Which is the correct name for CaCl2

  1. Calcium dichloride

  2. Calcium chlorine

  3. Calcium chloride

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

For ionic compounds, the metal name (Calcium) is followed by the non-metal name with an '-ide' suffix (Chloride). Prefixes like 'di-' are not used for simple ionic compounds.

Multiple choice

Which of the following is not a salt?

  1. Table salt

  2. Calcium sulfate

  3. Calcium

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

Calcium is an element, not a salt. Salts are ionic compounds formed from the neutralization reaction of an acid and a base (e.g., calcium sulfate, table salt).

Multiple choice

Which solution will be basic?

  1. NaCl

  2. NaNO3

  3. Ag2SO4

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

LiF is a salt of a strong base (LiOH) and a weak acid (HF). In aqueous solution, the F- ion undergoes hydrolysis to form HF and OH-, making the solution basic.

Multiple choice

The best method to use to make the salt of a reactive metal e.g. sodium chloride is....

  1. reacting an acis and carbonate

  2. reacting the metal with the acid

  3. reacting the metal and an insoluble base (oxide)

  4. titration, racting acid and alkali
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Titration is the best method for making salts of reactive metals like sodium chloride because reactive metals react too violently with acid. Instead, you neutralize an acid with an alkali (like NaOH) using titration to get exact stoichiometric amounts, then evaporate to get pure salt crystals.

Multiple choice

the salts fromed by nitric acid have names which end in

  1. nitrate

  2. nitric

  3. acid

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

Nitrates are the salts formed from nitric acid, following the naming rule that acid names ending in '-ic' form salts ending in '-ate'. Nitric acid (HNO3) produces salts called nitrates (e.g., sodium nitrate, potassium nitrate). The 'nitric' ending becomes 'nitrate' in the salt name.

Multiple choice

Which of these is not an example of neutralization?

  1. taking antacid pills for indigestion

  2. adding alkalis to lakes

  3. using toothpaste

  4. adding lime to coca-cola
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Neutralization is a reaction between an acid and an alkali. Adding lime (an alkali) to Coca-Cola (an acidic drink) is a neutralization reaction, so the premise of the question is slightly confusing, but it is the only option that fits the chemical definition of neutralization.

Multiple choice

Which of these is an alkali?

  1. toothpaste

  2. hydrochloric acid

  3. sugar

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

Toothpaste is slightly alkaline to help neutralize the acids produced by bacteria in the mouth.