Chemistry Test 33

Result

Chemistry Test 33

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Weekly Quiz Competition

Question 1
4 / -1

Which of the following compounds is the most acidic?

A
As₂O₃

B
P₂O₅

C
Sb₂O₃

D
Bi₂O₃

Solution

P₂O₅ is the most acidic among these because acidic character of oxides decreases on moving downward in a group.
Question 2
4 / -1

Hybridisations of Ni²⁺ in the following complex ions is:

A. [Ni(H₂O)₆]²⁺

B. [NiCl₄]^2-

C. [Ni(CN)₄]^2-

A
A: sp³d² B:sp³ C: dsp²

B
A: sp³d² B: dsp² C: sp³

C
A: dsp² B: sp³d² C: sp³

D
A: sp³ B: sp³d² C: dsp²

Solution

[Ni(H₂O)₆]: sp³d² hybridisation (octahedral)

[NiCl₄]^2-: sp³ hybridisation (tetrahedral)

[Ni(CN)₄]^2-: dsp² hybridisation (square planar)
Question 3
4 / -1

If a molecule MX₃ has zero dipole moment, then the sigma bonding orbital used by M is

A
sp³d hybrid

B
sp hybrid

C
sp³d² hybrid

D
sp² hybrid

Solution

If a molecule MX₃ (e.g. BF₃) has zero dipole moment, the σ-bonding orbital used by M is sp²-hybrid. The zero dipole moment is due to its symmetrical trigonal planar structure.