A. C6H5OH
B. C6H5CH(OH)2
C. C6H5CH2OH
D. C6H5COOH
✅ The correct answer is option C.
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.
192. During SN2 mechanism carbon atom changes its state of hybridization as
A. sp→sp2
B. sp2→sp3
C. sp3→sp
D. sp3→sp2
✅ The correct answer is option D.
193. Which one of the following is also known as the lactic acid?
A. 3-Hydroxy propanoic acid
B. 2-Hydroxy propanoic acid
C. 2-hydroxy butanoic acid
D. 3-hydroxy butanoic acid
✅ The correct answer is option B.
194. What will be the order of reaction of a reaction whose rate can be expressed as R = K [A] [B]?
A. 0
B. 1
C. 2
D. 3
✅ The correct answer is option C.
195. Which one of the following is also known as the tartaric acid?
A. 2 3-dihydroxy butane 1 4 -dioic acid
B. 2 3 -dihydroxy butanedioic acid
C. 2 3 -dihydroxy butanedioic acid
D. 2 2 -dihydroxy butanoic acid
✅ The correct answer is option A.
196. Which one among the following is not a good leaving group?
A. HSO4
B. CI-
C. OH-
D. Br-
✅ The correct answer is option C.
197. Water gas heated at 450°C and 200 atm pressure in the presence of ZnO+Cr2O3 will produce
A. Methanal
B. Methanol
C. Carbonic acid
D. Methane
✅ The correct answer is option B.
198. What is the order of kinetics in the SN1 mechanism?
A. Zero
B. First
C. Second
D. Third
✅ The correct answer is option B.
199. The residue obtained after the crystallization of sugar from concentrated sugar cane juice is called
A. Mother liquor
B. Filterate
C. Extract
D. Molasses
✅ The correct answer is option D.
200. The coordination number of the transition element in [Pt Cl NO2 (NH3)4]2- is
A. 2
B. 6
C. 4
D. 8
✅ The correct answer is option B.