Chemistry

Acids and Bases

579 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 of the following is a weak acid?

  1. Hydrochloric acid (HCl)

  2. Acetic acid (CH3COOH)

  3. Carbonic acid (H2CO3)

  4. Phosphoric acid (H3PO4)
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A weak acid is an acid that partially dissociates in water to form hydrogen ions (H+) and its conjugate base. Acetic acid (CH3COOH) is a weak acid that partially dissociates in water to form hydrogen ions and acetate ions.

Multiple choice

What is the primary organic acid found in citrus fruit juices?

  1. Citric acid

  2. Malic acid

  3. Tartaric acid

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

Citric acid is the predominant organic acid in citrus fruit juices, contributing to their sour taste and tangy flavor.

Multiple choice

What is the main organic acid found in apple juice?

  1. Malic acid

  2. Citric acid

  3. Tartaric acid

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

Malic acid is the predominant organic acid in apple juice, contributing to its tart and refreshing flavor.

Multiple choice

Which additive is commonly used to control the acidity or alkalinity of pet food?

  1. Acids

  2. Bases

  3. Buffers

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

Buffers are added to pet food to control the acidity or alkalinity, ensuring an optimal pH level for proper digestion and nutrient absorption.

Multiple choice

What is the main organic acid found in apple juice?

  1. Citric acid

  2. Malic acid

  3. Tartaric acid

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

Malic acid is the main organic acid in apples and apple juice, contributing to its tart flavor.

Multiple choice

What is the main organic acid found in lemon juice?

  1. Citric acid

  2. Malic acid

  3. Tartaric acid

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

Citric acid is the main organic acid in lemons and lemon juice, contributing to its sour flavor.

Multiple choice

Myth or Fact: Soda is more acidic than battery acid.

  1. Myth

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

The pH of soda is typically around 2.5, while the pH of battery acid is around 1. This means that soda is more acidic than battery acid, but not by as much as some people believe.

Multiple choice

What is the main organic acid present in citrus fruit juices?

  1. Citric acid

  2. Malic acid

  3. Tartaric acid

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

Citric acid is the predominant organic acid in citrus fruit juices, imparting a sour taste and contributing to their acidity.

Multiple choice

What is the name of the compound formed when an acid and a base react?

  1. Salt

  2. Water

  3. Carbon dioxide

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

When an acid and a base react, they form a salt and water. This reaction is known as neutralization.

Multiple choice

What is the primary component of acid mine drainage?

  1. Sulfuric acid.

  2. Nitric acid.

  3. Hydrochloric acid.

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

Acid mine drainage is primarily composed of sulfuric acid, which is formed when sulfide minerals in the ore are exposed to oxygen and water.

Multiple choice

Which of the following is an example of a food additive that is used to control acidity?

  1. Sodium bicarbonate

  2. Potassium hydroxide

  3. Citric acid

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

Sodium bicarbonate, potassium hydroxide, and citric acid are all food additives that are used to control acidity in food.

Multiple choice

What is the term used to describe the process of converting a plasma back into a neutral gas?

  1. Recombination

  2. Deionization

  3. Neutralization

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

Recombination is the process of converting a plasma back into a neutral gas. This involves the recombination of electrons and ions to form neutral atoms or molecules.

Multiple choice

What is the chemical formula for sulfuric acid?

  1. H2SO4

  2. HCl

  3. HNO3

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

The chemical formula for sulfuric acid is H2SO4, indicating that a sulfuric acid molecule consists of two hydrogen atoms, one sulfur atom, and four oxygen atoms.

Multiple choice

What is the chemical formula for hydrochloric acid?

  1. H2SO4

  2. HCl

  3. HNO3

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

The chemical formula for hydrochloric acid is HCl, indicating that a hydrochloric acid molecule consists of one hydrogen atom and one chlorine atom.

Multiple choice

What is the chemical formula for nitric acid?

  1. H2SO4

  2. HCl

  3. HNO3

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

The chemical formula for nitric acid is HNO3, indicating that a nitric acid molecule consists of one hydrogen atom, one nitrogen atom, and three oxygen atoms.