Atomic Structure — Chemistry MCQs (Class 11)
Free chapter-wise Chemistry MCQs with answers for MDCAT, FSc and entry tests.
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#73 Which pair are isobars?
A) 12C and 14C
B) 1H and 2H
C) 14C and 14N
D) 35Cl and 37Cl
#74 Which pair are isotopes?
A) 1H and 2H
B) 14C and 14N
C) 23Na and 24Mg
D) 16O and 16N
#75 Which pair are isotones?
A) 12C and 14C
B) 14C and 15N
C) 1H and 2H
D) 16O and 17F
#76 Energy of an electron becomes more negative when it is:
A) Farther from nucleus
B) Closer to nucleus
C) Ionized
D) At infinity
#77 Ionization of hydrogen corresponds to n equal to:
A) 1
B) 2
C) Infinity
D) 3
#78 Transition from n = 3 to n = 2 in hydrogen lies in:
A) Lyman series
B) Balmer series
C) Paschen series
D) Brackett series
#79 Possible values of l for a given n are from:
A) 1 to n
B) 0 to n - 1
C) -n to +n
D) -l to +l
#80 For n = 3, total number of orbitals is:
A) 6
B) 9
C) 18
D) 3
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