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

Sulphuric acid is

  1. a reducing agent

  2. an oxidising agent

  3. both oxidising and reducing agent

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

Ans : 2.

Multiple choice

Water has pH 7, that means it is

  1. acidic in nature

  2. basic in nature

  3. neutral

  4. pH doesn't tell its nature
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

It is correct as for neutral solution  the pH is =7.

Multiple choice

Which among the following is a synthetic S-acyl derivative of thiamine?

  1. Adenosine thiamine diphosphate

  2. Adenosine thiamine triphosphate

  3. Allithiamine

  4. Benfotiamine

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

Benfotiamine is a synthetic S-acyl derivative of thiamine (vitamin B1). After absorption, benfotiamine can be dephosphorylated by cells bearing an ecto-alkaline phosphatase to the lipid-soluble S-benzoylthiamine.

Multiple choice

Which of the following is the first known acid?

  1. Amino acid

  2. Acetic acid/Ethanoic

  3. Alginic Acidc

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

Acetic acid (found in vinegar) was known to ancient civilizations including Babylonians (around 3000 BCE), who used it in food preservation. It was the first acid systematically documented and used in practical applications. Amino acids were discovered much later (aspartic acid in 1868), and alginic acid was discovered in 1881.

Multiple choice

H2O is

  1. sulphuric acid

  2. water

  3. nitric acid

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

H2O is the chemical formula for water, consisting of two hydrogen atoms bonded to one oxygen atom. Sulphuric acid is H2SO4 and nitric acid is HNO3.

Multiple choice

Acetic acid is present in

  1. vinegar

  2. curd

  3. lime

  4. fish

  5. rancid butter
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Vinegar is essentially a solution of acetic acid (typically 5-8% by volume) in water. It is produced through fermentation of ethanol by acetic acid bacteria. Curd contains lactic acid, lime contains citric acid, fish is not characterized by acid content, and rancid butter contains fatty acids from lipid oxidation.