A. Principal (QN)
B. Azimuthal (QN)
C. Spin (QN)
D. Both a & b
✅ The correct answer is option B.
Chemistry MCQs
Phosphorus is a Greek word and it means
A. Light bearing
B. Fire
C. Impure
D. Tetrahedral
✅ The correct answer is option A.
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.
Which of the following does not contain phosphorus?
A. Yolk of egg
B. Bone
C. Nerves
D. Steel
✅ The correct answer is option D.
The maximum number of electron in a subshell with? = 3fs
A. 6
B. 10
C. 14
D. 18
✅ The correct answer is option C.
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.
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.
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.
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.
When an atom absorbs energy the lines in the spectrum will appear which are
A. Brighter
B. Darker
C. Colourless
D. Hard to locate
✅ The correct answer is option B.