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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

251. Which of the following substances does not give iodoform test?

September 17, 2025 by Admin
A. Acetaldehyde
B. Ethyl alcohol
C. Methyl alcohol
D. Acetone
✅ The correct answer is option C.
Categories Aldehydes and Ketones MCQs, Chemistry Tags Aldehydes and Ketones MCQs, Chemistry MCQs Leave a comment

252. Molecular ions are formed by passing

September 17, 2025 by Admin
A. High energy electron beam
B.   – particle
C. X-rays
D. All of the above
✅ The correct answer is option D.
Categories Basic Concept MCQs, Chemistry Tags Basic Concept MCQs, Chemistry MCQs Leave a comment

253. Molten NaCl conducts electricity due to the presence of

September 17, 2025 by Admin
A. Free Electrons
B. Free molecules
C. Free ions
D. Atoms of Na and Cl
✅ The correct answer is option C.
Categories Chemistry, Electrochemistry MCQs Tags Chemistry MCQs, Electrochemistry MCQs Leave a comment

254. Formalin is _______ % solution of formaldehyde in water

September 17, 2025 by Admin
A. 10%
B. 20%
C. 40%
D. 60%
✅ The correct answer is option C.
Categories Aldehydes and Ketones MCQs, Chemistry Tags Aldehydes and Ketones MCQs, Chemistry MCQs Leave a comment

255. The number of peaks obtained in mass spectrometry shows

September 17, 2025 by Admin
A. Relative abundance
B. The average mass of the element
C. Number of isotopes
D. Relative isotopic mass
✅ The correct answer is option C.
Categories Basic Concept MCQs, Chemistry Tags Basic Concept MCQs, Chemistry MCQs Leave a comment

256. Elements in the same vertical group of the periodic table have same

September 17, 2025 by Admin
A. Number of valence electrons
B. Atomic number
C. Atomic mass
D. Atomic volume
✅ The correct answer is option A.
Categories Chemistry, Periodic Classification Of Elements MCQs Tags Chemistry MCQs, Periodic Classification Of Elements MCQs Leave a comment

257. Which of the following aldehydes shows rapid reaction with sodium nitroprusside?

September 17, 2025 by Admin
A. Formaldehyde
B. Acetaldehyde
C. Benzaldehyde
D. Acetone
✅ The correct answer is option D.
Categories Aldehydes and Ketones MCQs, Chemistry Tags Aldehydes and Ketones MCQs, Chemistry MCQs Leave a comment

258. The empirical formula of chloroform is

September 17, 2025 by Admin
A. CH2 C12
B. CH3C1
C. CC14
D. CHC13
✅ The correct answer is option D.
Categories Basic Concept MCQs, Chemistry Tags Basic Concept MCQs, Chemistry MCQs Leave a comment

259. An element having a low value of ionization energy and low value of electron affinity is likely to belong to

September 17, 2025 by Admin
A. Group IA
B. Group IB
C. Group VIIA
D. Group VIII
✅ The correct answer is option A.
Categories Chemistry, Periodic Classification Of Elements MCQs Tags Chemistry MCQs, Periodic Classification Of Elements MCQs Leave a comment

260. Acetone reacts with HCN to form a cyanohydrin. It is an example of

September 17, 2025 by Admin
A. Electrophilic Addition
B. Electrophilic substitution
C. Nucleophilic addition
D. Nucleophilic substitution
✅ The correct answer is option C.
Categories Aldehydes and Ketones MCQs, Chemistry Tags Aldehydes and Ketones MCQs, Chemistry MCQs Leave a comment
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