Chemistry
Mix
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#1 The correct outer electronic configuration of chromium (Z = 24) is:
A) 4s1 3d5
B) 4s2 3d4
C) 4s3 3d6
D) None
#2 The Aufbau Principle states that
A) Only two electrons can occupy an orbital
B) Electrons enter the lowest available energy level
C) Electrons tend to occupy empty orbitals and avoid pairing
D) Orbitals are regions where probability of finding electrons is maximum
#3 Which of the following ions contains 5 unpaired electrons?
A) Cr3+
B) Fe3+
C) Mn2+
D) b and c both
#4 The number of hybridized orbitals in sp hybridized carbon atom is
A) 1
B) 2
C) 3
D) 4
#5 VSEPR theory is used to predict:
A) Molecular mass
B) Molecular shape
C) Reaction rate
D) Ionization energy
#6 In VSEPR theory, lone pairs cause:
A) Increase in bond length
B) Decrease in bond angle
C) No change in geometry
D) Ionic bonding
#7 No. of moles of oxygen molecules in 0.5 moles of Al2(SO4)3:
A) 6
B) 3
C) 12
D) 4
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