A. Coloured solid
B. Brittle
C. Hard
D. All of above
✅ The correct answer is option A.
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.
132. The magnetic quantum number (QN) has its values determined directly by the value of
A. Principal (QN)
B. Azimuthal (QN)
C. Spin (QN)
D. Both a & b
✅ The correct answer is option B.
133. Phosphorus is a Greek word and it means
A. Light bearing
B. Fire
C. Impure
D. Tetrahedral
✅ The correct answer is option A.
134. The atomic number of an element having the maximum number of unpaired electrons in p-subshell is
A. 7
B. 10
C. 12
D. 16
✅ The correct answer is option A.
135. Which of the following does not contain phosphorus?
A. Yolk of egg
B. Bone
C. Nerves
D. Steel
✅ The correct answer is option D.
136. The maximum number of electron in a subshell with? = 3fs
A. 6
B. 10
C. 14
D. 18
✅ The correct answer is option C.
137. The rate of reaction
A. Increases as the reaction proceeds
B. Decreases as the reaction proceeds
C. Remains the same as the reaction proceeds
D. May decrease or increase as the reaction proceeds
✅ The correct answer is option B.
138. The radius of the third shell of H-atom is
A. 5.761 A?
B. 4.761 A?
C. 6.671 A?
D. 3.716 A?
✅ The correct answer is option B.
139. The addition of a catalyst to the reaction system
A. Increases the rate of forwarding reaction only
B. Increases the rate of the reverse reaction
C. Increases the rate of forwarding but decreases the rate of backward reaction
D. Increases the rate of forward as well as backward reaction equally
✅ The correct answer is option D.
140. Alkanes containing a methyl group on main chain at 2nd carbon are called
A. Iso-alkane
B. Normal-alkane
C. Neo-alkane
D. Branched-alkane
✅ The correct answer is option A.