P- Block Elements
15 Questions
| Total Attempts: 1521
Time: 30 Minute
Questions and Answers
- 1.Which of the following pairs of ions are iso-electronic and iso-structral?
- A.
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- B.
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- C.
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- D.
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- 2.Which of the following element can be involved in pπ-dπ bonding?
- A.
Carbon
- B.
Nitrogen
- C.
Phosphorous
- D.
Boron
- 3.Maximum co-valency of nitrogen is:
- A.
3
- B.
4
- C.
5
- D.
6
- 4.Strong reducing behavior of H3PO2 is due to:
- A.
Low oxidation state of phosphorous
- B.
Presence of two –OH groups and one P-H group
- C.
Presence of one –OH group and two P-H group
- D.
High electron gain enthalpy of phosphorous
- 5.In solid state PCl5 is a:
- A.
Covalent solid
- B.
Octahedral structure
- C.
Ionic solid with [PCl6]+ octahedral and [PCl4]- tetrahedral
- D.
Ionic solid with [PCl4]+ tetrahedral and [PCl6]- octahedral
- 6.The oxidation state of central atom in the anion of compound NaH2PO2 will be:
- A.
+ 1
- B.
+ 3
- C.
+ 5
- D.
- 3
- 7.
![A brown ring is formed in the ring test for ion. It is due to the formation of: - ProProfs]( "A brown ring is formed in the ring test for ion. It is due to the formation of:")
A brown ring is formed in the ring test for ion. It is due to the formation of:- A.
[Fe (H2O) 5(NO)] 2+
- B.
FeSO4.NO2
- C.
[Fe (H2O) 4(NO) 2]2+
- D.
FeSO4.HNO3
- 8.The molecule having smallest bond angle is
- A.
AsCl3
- B.
SbCl3
- C.
PCl3
- D.
NCl3
- 9.Water is oxidized to oxygen by:
- A.
ClO2
- B.
KmnO4
- C.
H2O2
- D.
F2
- 10.The shape of XeO2F2 molecule is:
- A.
Trigonal bi-pyramidal
- B.
Square planar
- C.
Tetrahedral
- D.
See-saw shaped
- 11.Which one of the following is present as an active constituent in bleaching powder for bleaching action?
- A.
CaCl2
- B.
CaOCl2
- C.
Ca(OCl)2
- D.
CaO2Cl
- 12.Which of the following structures is the most preferred and hence of lowest energy for SO3?
- A.
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- B.
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- C.
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- D.
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- 13.
![Identify the correct order for their acidic strength:
- ProProfs]( "Identify the correct order for their acidic strength:")
Identify the correct order for their acidic strength:- A.
I > II> III
- B.
II > I> III
- C.
III > II> I
- D.
I > III> II
- 14.Which of the following noble gas is used in miner’s camp?
- A.
Argon
- B.
Krypton
- C.
Helium
- D.
Neon
- 15.Which of the following fluoride of Xe has zero dipole moment?
- A.
XeF2
- B.
XeF6
- C.
XeF4
- D.
Both (a) and (c)
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