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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

151. The value of activation energy is primarily determined by

September 17, 2025 by Admin
A. Temperature
B. Effective collision
C. Concentration of reactants
D. Chemical nature of reactants and products
✅ The correct answer is option B.
Categories Chemical Kinetics MCQs, Chemistry Tags Chemical Kinetics MCQs, Chemistry MCQs Leave a comment

152. Hydrogenolysis results in the formation of

September 17, 2025 by Admin
A. Alkane
B. Alkene
C. Alkyne
D. Aldehydes
✅ The correct answer is option A.
Categories Aliphatic Hydrocarbons MCQs, Chemistry Tags Aliphatic Hydrocarbons MCQs, Chemistry MCQs Leave a comment

153. Which of the following is different with respect to physical appearance?

September 17, 2025 by Admin
A. Arsenic
B. Phosphorus
C. Antimony
D. Bismuth
✅ The correct answer is option B.
Categories Chemistry, Group 5A and 6A Elements MCQs Tags Chemistry MCQs, Group 5A and 6A Elements MCQs Leave a comment

154. Sum of exponents of molar concentration is called

September 17, 2025 by Admin
A. Order of reaction
B. Molecularity
C. Rate of reaction
D. Average of reaction
✅ The correct answer is option A.
Categories Chemical Kinetics MCQs, Chemistry Tags Chemical Kinetics MCQs, Chemistry MCQs Leave a comment

155. Clemmensens reduction infolves the reduction of

September 17, 2025 by Admin
A. Ketone
B. Aldehyde
C. Alkane
D. All of the above
✅ The correct answer is option A.
Categories Aliphatic Hydrocarbons MCQs, Chemistry Tags Aliphatic Hydrocarbons MCQs, Chemistry MCQs Leave a comment

156. Which one of the followings possesses melting point below 0?C?

September 17, 2025 by Admin
A. Nitrogen
B. Phosphorus
C. Carbon
D. Bismuth
✅ The correct answer is option A.
Categories Chemistry, Group 5A and 6A Elements MCQs Tags Chemistry MCQs, Group 5A and 6A Elements MCQs Leave a comment

157. Spontaneous reactions are

September 17, 2025 by Admin
A. Moderate
B. Slow
C. Fast
D. Not natural
✅ The correct answer is option C.
Categories Chemical Kinetics MCQs, Chemistry Tags Chemical Kinetics MCQs, Chemistry MCQs Leave a comment

158. Removal of CO2 is called

September 17, 2025 by Admin
A. Carboxylation
B. Decarboxylation
C. Esterification
D. Hydroxylation
✅ The correct answer is option B.
Categories Aliphatic Hydrocarbons MCQs, Chemistry Tags Aliphatic Hydrocarbons MCQs, Chemistry MCQs Leave a comment

159. Compounds of nitrogen and phosphorus are mostly

September 17, 2025 by Admin
A. Ionic
B. Covalent
C. Polar
D. All varieties are possible
✅ The correct answer is option B.
Categories Chemistry, Group 5A and 6A Elements MCQs Tags Chemistry MCQs, Group 5A and 6A Elements MCQs Leave a comment

160. In rate expression the concentration of reactants is negative. It shows

September 17, 2025 by Admin
A. The concentration of reactant does not change
B. The concentration of product increases
C. The concentration of reactant decreases
D. The concentration of reactant increases
✅ The correct answer is option C.
Categories Chemical Kinetics MCQs, Chemistry Tags Chemical Kinetics MCQs, Chemistry MCQs Leave a comment
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