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

Tastes bitter?

  1. acid

  2. base

  3. salt

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

A bitter taste is a characteristic property of bases.

Multiple choice

A strong acid can neutralize a

  1. strong base

  2. strong acid

  3. strong salt

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

Neutralization is the reaction between an acid and a base to form water and a salt.

Multiple choice

Tastes Sour?

  1. acid

  2. base

  3. salt

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

Acids are characterized by their sour taste. Bases typically taste bitter and feel slippery.

Multiple choice

Which is not a strong acid?

  1. HCl

  2. HF

  3. HBr

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

HCl, HBr, and HI are strong acids that dissociate completely. HF is a weak acid because the bond between hydrogen and fluorine is strong, leading to incomplete dissociation.

Multiple choice

A proton is considered to be a _________.

  1. hydrogen ion

  2. hydroxide ion

  3. chloride ion

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

A hydrogen atom consists of one proton and one electron. When it loses its electron to become an ion (H+), only the proton remains.

Multiple choice

which pH number is the most acidic?

  1. 5

  2. 1

  3. 7

  4. 9
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The pH scale ranges from 0 to 14. Values lower than 7 are acidic, with lower numbers indicating higher acidity (higher concentration of hydronium ions).

Multiple choice

The forumla HCl stands for

  1. The hydronium ion

  2. Hydrogen peroxide

  3. Hydrochloric acid

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

HCl is the chemical formula for hydrochloric acid, which is a common strong acid found in the stomach.

Multiple choice

All monoprotic acids are strong acids

  1. true

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

Monoprotic acids (like HCl) can be strong, but many (like acetic acid) are weak. The number of protons an acid can donate does not determine its strength.

Multiple choice

The hydronium ion (H3O+) is just one of the many acid ions,

  1. true

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

The hydronium ion is the primary ion formed when an acid dissolves in water. While other ions exist in chemistry, the hydronium ion is the defining characteristic of acidic solutions in the Bronsted-Lowry and Arrhenius models.

Multiple choice

What compounds produce sour tastes in foods?

  1. acids

  2. bases

  3. salts

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

Acids are chemically characterized by their sour taste. Bases are typically bitter, and salts vary in taste depending on their composition.

Multiple choice

Use the terms __and __ when describing the concentration of acids and bases.

  1. strong and weak

  2. concentrated and diluted

  3. strong and concentrated

  4. weak and diluted
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Concentration refers to the amount of solute per unit volume of solvent, which can be described as concentrated (high amount) or diluted (low amount). Strong and weak refer to the degree of dissociation of an acid or base.