🌟 Welcome to the Ultimate Chemistry MCQs Hub – Set 1!

Looking for Chemistry Questions and Answer MCQ to boost your preparation? You’re at the right place! Our collection of objective chemistry questions is perfect for all exams worldwide – from Indian exams like JEE, NEET, GATE, UPSC, CBSE, ICSE to international tests such as SAT, GRE, GMAT, IELTS Science, Cambridge A-Level, IB Chemistry, and for school students of Class 11 & Class 12.

Each MCQ is carefully curated with answers and explanations so you can master Organic, Inorganic, Physical, and General Chemistry concepts easily. Whether you are a school student, college aspirant, or preparing for competitive exams, our interactive Chemistry Questions and Answer MCQ portal is designed to make learning engaging, fun, and effective.

💡 Start practicing today and get ready to ace your exams worldwide with confidence!

🔹 This is Set 1 of our Chemistry MCQs. More sets can be accessed below – keep scrolling to explore additional questions and practice more!

📚 Start practicing your Chemistry MCQs here – scroll down to attempt the questions in Set 1!

Q1. Which of the following is not a subatomic particle?
  • (A) Electron
  • (B) Photon
  • (C) Proton
  • (D) Neutron
Show Answer ▼
Correct answer is Photon. Photon is a particle of light. It is not a constituent of the atom, whereas electrons, protons, and neutrons are true subatomic particles.
Q2. An element consisting of only one type of atom is termed as:
  • (A) Compound
  • (B) Isotope
  • (C) Pure element
  • (D) Mixture
Show Answer ▼
Correct answer is Pure element. A pure element contains only one kind of atom. Compounds and mixtures contain more than one type of substance, while isotopes are variants of the same element.
Q3. The atomic nucleus is made up of:
  • (A) Protons and neutrons
  • (B) Electrons and protons
  • (C) Protons, neutrons, and electrons
  • (D) Electrons and neutrons
Show Answer ▼
Correct answer is Protons and neutrons. The nucleus is the dense central part of an atom. It contains positively charged protons and neutral neutrons, while electrons revolve outside the nucleus.
Q4. Electrons revolve around the nucleus, which contains:
  • (A) Protons and neutrons
  • (B) Only protons
  • (C) Electrons, protons, and neutrons
  • (D) Only electrons
Show Answer ▼
Correct answer is Protons and neutrons. The nucleus forms the central core of an atom. It contains protons and neutrons, while electrons revolve around it in shells.
Q5. Which particle carries a negative charge?
  • (A) Alpha particle
  • (B) Beta particle
  • (C) Proton
  • (D) Neutron
Show Answer ▼
Correct answer is Beta particle. Beta particles are electrons. Since electrons carry a negative charge, beta radiation is negatively charged.
Q6. Which of the following is an example of a chemical change?
  • (A) Breaking of glass
  • (B) Melting of ice
  • (C) Evaporation of water
  • (D) Rusting of iron
Show Answer ▼
Correct answer is Rusting of iron. Rusting is a chemical change. A new substance (iron oxide) is formed, and the process cannot be reversed easily.
Q7. The energy mainly involved in the decomposition of water by electrolysis is:
  • (A) Electrical energy
  • (B) Sound
  • (C) Light
  • (D) Heat
Show Answer ▼
Correct answer is Electrical energy. Electrolysis uses electrical energy to break water molecules into hydrogen and oxygen gases.
Q8. Which of the following is a physical change?
  • (A) Burning of paper
  • (B) Dissolving sugar in water
  • (C) Rusting of iron
  • (D) Formation of curd from milk
Show Answer ▼
Correct answer is Dissolving sugar in water. This is a physical change because no new substance is formed and sugar can be recovered by evaporation. Burning of paper, rusting of iron, and formation of curd are all chemical changes.
Q9. Change of water into vapour is considered a:
  • (A) Nuclear change
  • (B) Chemical change
  • (C) Physical change
  • (D) Biological change
Show Answer ▼
Correct answer is Physical change. When water evaporates, it changes from liquid to gas without forming a new substance. This is a classic physical change. Nuclear, chemical, and biological changes involve transformation at atomic, molecular, or life-process levels, which evaporation does not.
Q10. Pasteurization refers to the process in which:
  • (A) Milk is dried completely
  • (B) Milk is frozen to destroy germs
  • (C) Milk is heated and then cooled rapidly within a fixed time
  • (D) Milk is boiled for many hours
Show Answer ▼
Correct answer is Milk is heated and then cooled rapidly within a fixed time. Pasteurization is a heat treatment process designed to kill harmful microorganisms without affecting the nutritional value of milk. It involves heating the milk to a specific temperature and then cooling it rapidly.
🧪 Click “Show Score” after chemistry MCQs!
⚗️🔬
🧪 Excellent! Ready to tackle the next 10 chemistry MCQs?
Keep experimenting! Every set you practice makes your chemistry knowledge stronger. ⚗️🔬

📌 You’ve reached the end of the current MCQ set. Don’t stop here! Explore other Chemistry MCQ sets below to strengthen your concepts, test your knowledge, and prepare confidently for exams worldwide – from Class 11 & 12 boards to JEE, NEET, GATE, UPSC, SAT, GRE and more.

Shopping Cart
Scroll to Top