p-Block Elements Test

Question 1
4 / -1

Which of the following is/are correct statement(s) regarding noble gases?

i. He₂ molecule does not exist

ii. value for noble gases is 1.4
iii. Heaviest noble gas present in air is xenon.
iv. 6th period starts with caesium and ends with radon.

A
i, iii and iv

B
i, ii and iv

C
ii, iii and iv

D
All are correct

Question 2
4 / -1

Which statement is false?

A
118th element is a noble gas called ununoctium

B
Helium is lightest noble gas

C
Xenon is the most reactive among the rare gases

D
Noble gases Ne, Kr and Xe were discovered by Ramsay and Rayleigh

Question 3
4 / -1

The ionisation potential of hydrogen atom is 13.6 eV. Then ionisation potential of He⁺ ion is

A
27.2 eV

B
6.8 eV

C
13.6 eV

D
54.4 eV

Question 4
4 / -1

Which of the following is/are correct among the following?
i. XeF₂ = sp³d, linear
ii. XeF₄ = sp³, square planar
iii. XeO₄ = sp³, tetrahedral
iv. XeF₆ = sp³d², octahedral

A
ii and ii

B
i and iii

C
i, ii and iii

D
Only iii

Question 5
4 / -1

The oxidation number of oxygen in O₂PtF₆ is

A
zero

B
+1/2

C
+1

D
-1/2

Question 6
4 / -1

The structure of ion is

A
trigonal bipyramidal

B
square pyramidal

C
octahedral

D
pentagonal

Question 7
4 / -1

The number of (pπ-dπ) π-bonds present in XeO₃ and XeO₄ respectively are

A
3 and 4

B
2 and 3

C
4 and 2

D
3 and 2

Question 8
4 / -1

XeF₆ on reaction with CsF produce

A
[XeF₅][CsF₂]

B
No reaction

C
[XeF₄][CsF₃]

D
Cs [XeF₇]

Question 9
4 / -1

Which of the following reaction occurs?

A
XeF₂+ PF₅ → XeF⁺ [PF₆]^-

B
XeF₄ + SbF₅ → [XeF₃⁺] [SbF⁶]^-

C
XeF₆ + H₂O → XeOF₄+ 2HF

D
All of these

Question 10
4 / -1

The wrong statement among the following is

A
Helium is used to fill observatory balloons because it is lighter than air and non-combustible

B
A mixture of 80 % helium and 20% oxygen is used for respiration by deep sea divers

C
The noble gas used in atomic reactors is argon

D
Neon is used in discharge tubes and fluorescent bulbs for advertisement display purposes

Question 11
4 / -1

Which oxide of nitrogen is obtained on heating ammonium nitrate at 250^oC?

A
Nitric oxide

B
Nitrous oxide

C
Nitrogen dioxide

D
Dinitrogen tetraoxide

Question 12
4 / -1

Which of the following oxides is anhydride of nitrous acid?

A
N₂O₃

B
NO₂

C
NO

D
N₂O₄

Question 13
4 / -1

A translucent white waxy solid (A) reacts with excess of chlorine to give a yellowish white powder (B). (B) reacts with organic compounds containing -OH group converting them into chloro derivatives. (B) on hydrolysis gives (C) and is finally converted to phosphoric acid. (A), (B) and (C) are?

A
P₄, PCl₃, H₃PO₄

B
P₄,PCl₅,H₃PO₃

C
P₄, PCl₅, POCl₃

D
P₄,PCl₃, POCl₃

Question 14
4 / -1

Which of the following statements is not correct about the structure of PCl₅?

A
PCl₅ has a trigonal bipyramidal structure

B
Three equatorial P-Cl bonds are equivalent

C
The two axial bonds are different and longer than equatorial bonds

D
Equatorial bond pairs suffer more repulsion than that of the axial bond pairs

Question 15
4 / -1

Why are all P-F bonds in PF₅ are not equivalent?

A
PF₅ has sp³d hybridisation, out of five P−F bonds three are equatorial which have different lengths

B
PF₅ has sp³ hybridisation, out of P−F bonds two are equatorial which have different lengths

C
Out of five P−F bonds two are axial and three equatorial. All five bonds have different bond lengths

D
PF₅ is made up of two types of bond namely covalent and coordinate, hence are not equivalent

Question 16
4 / -1

Direction (Q. Nos. 16 and 17) This section contains a paragraph, each describing theory, experiments, data, etc. Two questions related to the paragraph have been given. Each question has only one correct answer among the four given options (a), (b), (c) and (d).
Passage
The noble gases have closed-shell electronic configuration and are monoatomic gases under normal conditions. The lower boiling points of the lighter noble gases are due to weak dispersion forces between the atoms and the absence of other interatomic interactions.
Direct reaction of xenon with fluorine leads to the formation of a series of compounds with oxidation numbers +2, + 4, + 6 and + 8. XeF₄ reacts violently with water to give XeO₃. The compounds of xenon exhibit rich stereochemistry and their geometries can be deduced considering the total number of electron pairs in the valence shell.
Q.
The noble gas compound without lone pair on xenon atom is

A
XeF₆

B
XeOF₄

C
XeO₂F₄

D
XeO₂F₂

Question 17
4 / -1

The noble gases have closed-shell electronic configuration and are monoatomic gases under normal conditions. The lower boiling points of the lighter noble gases are due to weak dispersion forces between the atoms and the absence of other interatomic interactions.
Direct reaction of xenon with fluorine leads to the formation of a series of compounds with oxidation numbers +2, + 4, + 6 and + 8. XeF₄ reacts violently with water to give XeO₃. The compounds of xenon exhibit rich stereochemistry and their geometries can be deduced considering the total number of electron pairs in the valence shell.
Q.
Which of the following property decreases from helium to xenon?

A
Boiling Point

B
Density

C
Critical temperature

D
Ionization Enthalpy

Question 18
4 / -1

Direction (Q. Nos. 18 and 19) This section is based on Statement I and Statement II. Select the correct answer from the codes given below.

Q.

Statement I : Radon is produced upon α-decay of radium atom.

Statement II : α-particles which are equivalent to the atom, reduces the atomic number by 2 and atomic mass by 4 upon decay of mother nucleus.

A
Both Statement I and Statement II are correct and Statement II is the correct explanation of Statement I

B
Both Statement I and Statement II are correct but Statement II is not the correct explanation of Statement I

C
Statement I is correct but Statement II is incorrect

D
Statement II is correct but Statement I is incorrect

Question 19
4 / -1

Statement I : The structure of XeF₄ is square pyramidal.
Statement ll : The hybridisation of XeF₄ is sp³d².

A
Both Statement I and Statement II are correct and Statement II is the correct explanation of Statement I

B
Both Statement I and Statement II are correct but Statement II is not the correct explanation of Statement I

C
Statement I is correct but Statement II is incorrect

D
Statement II is correct but Statement I is incorrect

Question 20
4 / -1

Direction (Q. No. 20) Choices for the correct combination of elements from Column I and Column II are given as options (a), (b), (c) and (d) out of which one is correct.
Q.
Match the Column I with Column II and mark the correct option from the codes given below.

A

B

C

D

Question 21
4 / -1

Direction (Q. Nos. 21-25) This section contains 5 questions. When worked out will result in an integer from 0 to 9 (both inclusive).

Q.

Number of lone pairs on the central atom in XeOF₄ are

A
1

B
2

C
3

D
4

Question 22
4 / -1

Among XeF₂, XeF₄, XeF₆, XeO₃, XeO₄, XeO₂, XeOF₄ the number of compounds that have non-zero dipole moment.

A
7

B
6

C
4

D
5

Question 23
4 / -1

In XeF₂, state the total number of electron pairs in its Lewis dot structure.

A
3

B
8

C
9

D
2

Question 24
4 / -1

In argon, find the number of electrons with spin value + 1/2.

A
8

B
5

C
9

D
4

Question 25
4 / -1

Find the number of unpaired electrons in the fully excited xenon atom.

A
6

B
7

C
8

D
9

Submit Test

p-Block Element...

Question 1

i, iii and iv

i, ii and iv

ii, iii and iv

All are correct

Question 2

118th element is a noble gas called ununoctium

Helium is lightest noble gas

Xenon is the most reactive among the rare gases

Noble gases Ne, Kr and Xe were discovered by Ramsay and Rayleigh

Question 3

27.2 eV

6.8 eV

13.6 eV

54.4 eV

Question 4

ii and ii

i and iii

i, ii and iii

Only iii

Question 5

zero

+1/2

+1

-1/2

Question 6

trigonal bipyramidal

square pyramidal

octahedral

pentagonal

Question 7

3 and 4

2 and 3

4 and 2

3 and 2

Question 8

[XeF5][CsF2]

No reaction

[XeF4][CsF3]

Cs [XeF7]

Question 9

XeF2 + PF5 → XeF+ [PF6]-

XeF4 + SbF5 → [XeF3+] [SbF6]-

XeF6 + H2O → XeOF4 + 2HF

All of these

Question 10

Helium is used to fill observatory balloons because it is lighter than air and non-combustible

A mixture of 80 % helium and 20% oxygen is used for respiration by deep sea divers

The noble gas used in atomic reactors is argon

Neon is used in discharge tubes and fluorescent bulbs for advertisement display purposes

Question 11

Nitric oxide

Nitrous oxide

Nitrogen dioxide

Dinitrogen tetraoxide

Question 12

N2​O3​

NO2​

NO

N2​O4

Question 13

P4​, PCl3​, H3​PO4​

P4​,PCl5​,H3​PO3

P4​, PCl5​, POCl3

P4​,PCl3​, POCl3

Question 14

PCl5​ has a trigonal bipyramidal structure

Three equatorial P-Cl bonds are equivalent

The two axial bonds are different and longer than equatorial bonds

Equatorial bond pairs suffer more repulsion than that of the axial bond pairs

Question 15

PF5 has sp3d hybridisation, out of five P−F bonds three are equatorial which have different lengths

PF5 has sp3 hybridisation, out of P−F bonds two are equatorial which have different lengths

Out of five P−F bonds two are axial and three equatorial. All five bonds have different bond lengths

PF5 is made up of two types of bond namely covalent and coordinate, hence are not equivalent

Question 16

XeF6

XeOF4

XeO2F4

[XeF₅][CsF₂]

[XeF₄][CsF₃]

Cs [XeF₇]

XeF₂+ PF₅ → XeF⁺ [PF₆]^-

XeF₄ + SbF₅ → [XeF₃⁺] [SbF⁶]^-

XeF₆ + H₂O → XeOF₄+ 2HF

N₂O₃

NO₂

N₂O₄

P₄, PCl₃, H₃PO₄

P₄,PCl₅,H₃PO₃

P₄, PCl₅, POCl₃

P₄,PCl₃, POCl₃

PCl₅ has a trigonal bipyramidal structure

PF₅ has sp³d hybridisation, out of five P−F bonds three are equatorial which have different lengths

PF₅ has sp³ hybridisation, out of P−F bonds two are equatorial which have different lengths

PF₅ is made up of two types of bond namely covalent and coordinate, hence are not equivalent

XeF₆

XeOF₄

XeO₂F₄

XeO₂F₂