Chemistry

Acids and Bases

594 Questions

Acids and bases questions cover the chemical properties, common examples, and theoretical concepts of acidic and basic substances. Topics include identifying proton acceptors, recognizing amphoteric substances, and knowing the sources of everyday organic acids. These foundational chemistry questions are common across SSC, banking, and railways examinations.

Acid and base propertiesOrganic acidsAmphoteric substancesProton donors and acceptorsChemical formulas

Acids and Bases Questions

Multiple choice

Which sign is used between reactant and product to show that an acid is partially ionized to form ions in a chemical equation?

  1. Single arrow pointing towards right

  2. Double arrows pointing towards right

  3. Double arrows pointing towards right as well as left

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

Double arrows pointing towards right as well as left sign is used between reactant and product to show that an acid is partially ionized to form ions in a chemical equation.

Multiple choice

Glaceial acetic acid is a mixture of

  1. 90 percentage acetic acid and 10% water.

  2. 100% acetic acid.

  3. 50% acetic acid and 50% water.

  4. 10% acetic acid and 90% water.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Glacial acetic acid is pure acetic acid (100%) with no water content. The term 'glacial' refers to its tendency to form solid ice-like crystals at temperatures below 16.6°C. It is not a mixture.

Multiple choice

The group of chemical compounds to which quinine, morphine, nicotine, etc. belongs to

  1. Acids

  2. Alkalis

  3. Alkaloids

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

Alkaloid - one of a large group of organic, basic substances found in plants. They are usually bitter in taste and are characterized by powerful physiologic activity. Examples are morphine, cocaine, atropine, quinine, nicotine, and caffeine. The term is also applied to synthetic substances that have structures similar to plant alkaloids, such as procaine.

Multiple choice

H2S gas in water acts as

  1. weak base

  2. strong base

  3. weak acid

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

Hydrogen sulfide is slightly heavier than air; a mixture of H2S and air is explosive.Hydrogen sulfide acts as a reducing agent.Hydrogen sulfide is slightly soluble in water and acts as a weak acid, giving the hydrosulfide ion HS− and the sulphide ion S2−.A solution of hydrogen sulfide in water is initially clear but over time turns cloudy. This is due to the slow reaction of hydrogen sulfide with the oxygen dissolved in water, yielding elemental sulfur, which precipitates out.

Multiple choice

Ethylenediaminetetraacetic acid (EDTA) is a

  1. monodentate ligand

  2. bidentate ligand

  3. hexadentate ligand

  4. tridentate ligand

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A hexadentate ligand has 6 lone pairs of electrons - all of which can form co-ordinate bonds with the same metal ion. The best example is EDTA.The EDTA ion entirely wraps up a metal ion using all 6 of the positions .

Multiple choice

Carbon dioxide is

  1. an acidic oxide

  2. a basic oxide

  3. a natural oxide

  4. an atmospheric oxide
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Carbon dioxide is an acidic oxide because it reacts with water to form carbonic acid.

Multiple choice

Amino acids are

  1. acidic in nature

  2. basic in nature

  3. amphoteric in nature

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

Amino acids show both acidic as well as basic nature i.e., amphoteric nature due to presence of basic -NH2 group at one terminal and acidic -COOH group on the other.

Multiple choice

The acid used as a bleach, a deodorant and a disinfectant is

  1. chlorous acid

  2. hypochlorous acid

  3. chloric acid

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

Hypochlorous acid is a weak acid with the chemical formula HClO. It forms when chlorine dissolves in water. It cannot be isolated in pure form due to rapid equilibration with its precursor. HClO is an oxidizer, and as its sodium salt; sodium hypochlorite, (NaClO), or its calcium salt calcium hypochlorite, is used as a bleach, a deodorant, and a disinfectant.

Multiple choice

Which is the acid in our stomach?

  1. Nitric acid

  2. Carbonic acid

  3. Formic acid

  4. Sulphuric acid

  5. Hydrochloric acid
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Hydrochloric acid is the acid found in our stomach.

Multiple choice

Which of the following is the correct formula for Absolute Acid Test Ratio?

  1. Liquid Assets/Current Liabilities

  2. Absolute liquid assets/current assets

  3. Current assets/current liabilities

  4. Absolute liquid assets/current liabilities

  5. None of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Absolute liquid assets are equal to liquid assets minus accounts receivables (including bills receivables). Some examples of absolute liquid assets are cash, bank balance and marketable securities, etc.