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

About how much acetic acid is found in vinegar?

  1. 3%

  2. 10%

  3. 27%

  4. 39%
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Household vinegar typically contains a low concentration of acetic acid, usually around 4% to 5%, though some formulations can be around 3%. This mild concentration is safe for household use and cooking.

Multiple choice

Sulphuric Acid is

  1. H2SO4

  2. HNO3

  3. HCl

  4. H2O2
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Sulfuric acid has the chemical formula H2SO4, containing hydrogen, sulfur, and oxygen. HNO3 represents nitric acid, HCl represents hydrochloric acid, and H2O2 represents hydrogen peroxide.

Multiple choice

Bleach is an example of

  1. an acid

  2. a base

  3. a compound

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

Household bleach is a basic (alkaline) solution, typically containing sodium hypochlorite, with a pH of around 11 to 13. Bases are substances that can accept hydrogen ions, contrasting with acids which have a pH below 7. While bleach is also a mixture, 'a base' is the intended chemical classification here.

Multiple choice

These are weak acids.

  1. lemon juice , soap, vinegar

  2. lemon juice,vinegar,soda

  3. orange juice,coffee,nitric acid
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Lemon juice (citric acid), vinegar (acetic acid), and soda (carbonic acid) are all examples of weak acids.

Multiple choice

These are acids properties except

  1. Sour

  2. hydrogen ion

  3. Corrosive

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

Acids are sour, corrosive, and release hydrogen ions. Bitterness is a property of bases, not acids.

Multiple choice

choose correct statement.

  1. acids are proton and electron donor

  2. Acids are proton donor and electron acceptor

  3. Acids are proton acceptor and electron donor

  4. bases are proton acceptor and electron donor.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

According to the Bronsted-Lowry theory, acids are proton donors. In terms of Lewis theory, they are electron acceptors.

Multiple choice

Which one is not strong acid.

  1. Nitric acid

  2. Sulfuric acid

  3. Carbonic acid
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Carbonic acid is a weak acid, whereas nitric and sulfuric acids are strong acids.

Multiple choice

An amphoteric substance can act as acid and a base

  1. true

  2. false
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Amphoteric substances, such as water or amino acids, possess the ability to react as either an acid or a base depending on the environment. This is a fundamental property in acid-base chemistry.