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Chemistry

Practice the latest Chemistry MCQs with answers and explanations to prepare for exams and job tests. Our collection covers key topics such as atomic structure, periodic table, chemical bonding, organic chemistry, inorganic chemistry, physical chemistry, and environmental chemistry. These Chemistry multiple-choice questions are designed for students, competitive exam aspirants, and professionals appearing in NTS, PPSC, FPSC, CSS, PMS, university entry tests, and medical admission tests. Improve your concepts and problem-solving skills with our updated and comprehensive Chemistry MCQs online.

📘 Alcohols Phenols and Ethers MCQs
📘 Aldehydes and Ketones MCQs
📘 Aliphatic Hydrocarbons MCQs
📘 Alkyl Halides MCQs
📘 Aromatic Hydrocarbons MCQs
📘 Atomic Structure MCQs
📘 Basic Concept MCQs
📘 Carboxylic Acids MCQs
📘 Chemical Bonding MCQs
📘 Chemical Equilibrium MCQs
📘 Chemical Kinetics MCQs
📘 Chemistry Diagnostic Test MCQs
📘 Common Chemical Industries MCQs
📘 Electrochemistry MCQs
📘 Environmental Chemistry MCQs
📘 Experimental Techniques MCQs
📘 Gases MCQs
📘 Group 3A and 4A Elements MCQs
📘 Group 5A and 6A Elements MCQs
📘 Liquids and Solids MCQs
📘 Macromolecules MCQs
📘 Organic Chemistry MCQs
📘 Periodic Classification Of Elements MCQs
📘 S-Block Elements MCQs
📘 Solutions MCQs
📘 The Halogens and The Noble Gases MCQs
📘 ThermoChemistry MCQs
📘 Transition Elements MCQs

201. Shielding effect across the period

September 17, 2025 by Admin
A. Increases
B. Decreases
C. Constant
D. None
✅ The correct answer is option C.
Categories Chemical Bonding MCQs, Chemistry Tags Chemical Bonding MCQs, Chemistry MCQs Leave a comment

202. Which of the following is macronutrient?

September 17, 2025 by Admin
A. Cu
B. Cl
C. H
D. Zn
✅ The correct answer is option C.
Categories Chemistry, Common Chemical Industries MCQs Tags Chemistry MCQs, Common Chemical Industries MCQs Leave a comment

203. The halogen having highest electron affinity is

September 17, 2025 by Admin
A. Fluorine
B. Chlorine
C. Bromine
D. Iodine
✅ The correct answer is option B.
Categories Chemistry, The Halogens and The Noble Gases MCQs Tags Chemistry MCQs, The Halogens and The Noble Gases MCQs Leave a comment

204. Which one is not the absolute term of the element?

September 17, 2025 by Admin
A. Ionization energy
B. Electron affinity
C. Electronegativity
D. Atomic size
✅ The correct answer is option C.
Categories Chemical Bonding MCQs, Chemistry Tags Chemical Bonding MCQs, Chemistry MCQs Leave a comment

205. Addition of urea to the soil is _________ reaction.

September 17, 2025 by Admin
A. Endothermic
B. Exothermic
C. Both A and B
D. No heat energy is involved
✅ The correct answer is option B.
Categories Chemistry, Common Chemical Industries MCQs Tags Chemistry MCQs, Common Chemical Industries MCQs Leave a comment

206. Which one has the maximum number of unpaired electrons?

September 17, 2025 by Admin
A. 6X
B. 7Y
C. 9Z
D. 13W
✅ The correct answer is option B.
Categories Chemical Bonding MCQs, Chemistry Tags Chemical Bonding MCQs, Chemistry MCQs Leave a comment

207. Which of the following is the most suitable catalyst for ammonia synthesis?

September 17, 2025 by Admin
A. Pt
B. ZnO + Cr2O3
C. Fe in a fused mixture of Al2O3 + SiQ2 + MgO
D. All of the above
✅ The correct answer is option C.
Categories Chemistry, Common Chemical Industries MCQs Tags Chemistry MCQs, Common Chemical Industries MCQs Leave a comment

208. What is the relative rate of effusion of CO and CO2?

September 17, 2025 by Admin
A. CO is 1.25 times faster than CO2
B. CO is 3.75 times faster than CO2
C. CO is 1.25 times faster than CO
D. Both diffuse at the same rate
✅ The correct answer is option A.
Categories Chemistry, Gases MCQs Tags Chemistry MCQs, Gases MCQs Leave a comment

209. The cooling of molten urea by air in the tower is called

September 17, 2025 by Admin
A. Prilling
B. Evaporation
C. Condensation
D. Crystallization
✅ The correct answer is option A.
Categories Chemistry, Common Chemical Industries MCQs Tags Chemistry MCQs, Common Chemical Industries MCQs Leave a comment

210. Which of these gases diffuse more quickly than oxygen?

September 17, 2025 by Admin
A. H2S
B. NO
C. Cl2
D. N2O
✅ The correct answer is option B.
Categories Chemistry, Gases MCQs Tags Chemistry MCQs, Gases MCQs Leave a comment
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