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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

91. Which of the following is not a secondary pollutant

September 17, 2025 by Admin
A. Ozone
B. Carbonic acid
C. Sulphuric acid
D. Carbon dioxide
✅ The correct answer is option D.
Categories Chemistry, Environmental Chemistry MCQs Tags Chemistry MCQs, Environmental Chemistry MCQs Leave a comment

92. The substance which is found in dried up lakes of Tibet and California is

September 17, 2025 by Admin
A. Tincal
B. Boric acid
C. Calcium carbonate
D. Colemanite
✅ The correct answer is option A.
Categories Chemistry, Group 3A and 4A Elements MCQs Tags Chemistry MCQs, Group 3A and 4A Elements MCQs Leave a comment

93. Every sample of matter with uniform properties and fixed composition is called

September 17, 2025 by Admin
A. Solute
B. Solvent
C. Solution
D. Phase
✅ The correct answer is option D.
Categories Chemistry, Solutions MCQs Tags Chemistry MCQs, Solutions MCQs Leave a comment

94. The residence time of methane in the atmosphere is

September 17, 2025 by Admin
A. 3 – 7 days
B. 2 -3 days
C. 3 – 7 years
D. 2 – 3 years
✅ The correct answer is option C.
Categories Chemistry, Environmental Chemistry MCQs Tags Chemistry MCQs, Environmental Chemistry MCQs Leave a comment

95. Borax is a white crystalline solid and it is

September 17, 2025 by Admin
A. More soluble in cold water
B. More soluble in hot water
C. Insoluble in water
D. Soluble only in organic solvents
✅ The correct answer is option B.
Categories Chemistry, Group 3A and 4A Elements MCQs Tags Chemistry MCQs, Group 3A and 4A Elements MCQs Leave a comment

96. Which of the following technique is used for the separation of insoluble particles from liquids?

September 17, 2025 by Admin
A. Filtration
B. Crystallization
C. Solvent extraction
D. Chromatography
✅ The correct answer is option A.
Categories Chemistry, Experimental Techniques MCQs Tags Chemistry MCQs, Experimental Techniques MCQs Leave a comment

97. A major cause of SO2 on a global scale is

September 17, 2025 by Admin
A. Volcanoes
B. Electric sparks
C. Combustion
D. All
✅ The correct answer is option A.
Categories Chemistry, Environmental Chemistry MCQs Tags Chemistry MCQs, Environmental Chemistry MCQs Leave a comment

98. Which of the following does not give Borax bead test?

September 17, 2025 by Admin
A. Cu
B. Cr
C. Ni
D. A1
✅ The correct answer is option D.
Categories Chemistry, Group 3A and 4A Elements MCQs Tags Chemistry MCQs, Group 3A and 4A Elements MCQs Leave a comment

99. Which of the following way in used for classification of chromatography?

September 17, 2025 by Admin
A. Shape
B. Phase
C. Mechanism
D. All
✅ The correct answer is option D.
Categories Chemistry, Experimental Techniques MCQs Tags Chemistry MCQs, Experimental Techniques MCQs Leave a comment

100. Hypochlorous acid is used for disinfecting the water it reacts with the dissolved ammonia producing

September 17, 2025 by Admin
A. NH2Cl
B. NHCI2
C. NCI2
D. All of the above
✅ The correct answer is option D.
Categories Chemistry, Environmental Chemistry MCQs Tags Chemistry MCQs, Environmental Chemistry MCQs Leave a comment
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