P - Block Elements Test

Result

P - Block Elements Test - 86

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Weekly Quiz Competition

Question 1
4 / -1

Bleaching powder is obtained by the action of chlorine gas and

A
Dilute solution of Ca (OH)₂

B
Concentrated solution of Ca(OH)₂

C
Dry CaO

D
Dry slaked lime
Question 2
4 / -1

Conc. HNO₃ reacts with iodine to give

A
HI

B
HOI

C
HOIO₂

D
HOIO₃
Question 3
4 / -1

Which member of the halogen family (X₂) does not show positive oxidation state ( X₂⁺) ?

A
Fluorine

B
Chlorine

C
Bromine

D
Iodine
Question 4
4 / -1

The correct increasing order of ionic size of N^3‒ ,Na⁺ , F^‒ , O^2‒ and Mg²⁺ is

A
Mg²⁺ < Na⁺ < F^‒ < O^2‒ < N^3‒

B
Na⁺ < Mg²⁺ < F^‒ < O^2‒ < N³

C
N^3‒ < O^2‒ < F^‒ < Na⁺ < Mg²⁺

D
F^‒ < N^3‒ < O^2‒ < Mg²⁺ < Na⁺
Question 5
4 / -1

Elements of which of the following groups will form anions most readily ?

A
Oxygen family

B
Nitrogen family

C
Halogens

D
Alkali metals
Question 6
4 / -1

A

B

C

D

Solution
Question 7
4 / -1

Which one of the following sequences represents the correct increasing order of bond angles in the given molecules ?

A
H₂O < OF₂ < OCl₂ < ClO₂

B
OCl₂ < ClO₂ < H₂O < OF₂

C
OF₂ < H₂O < OCl₂ < ClO₂

D
ClO₂ < OF₂ < OCl₂ < H₂O
Question 8
4 / -1

The correct sequence of arrangement of the following compounds in order of decreasing oxidation numbers of iodine is

A
HIO₄ ,HI, I₂ ,ICl₅

B
HIO₄, ICl₅,HI, I₂

C
ICl₅,HIO₄, I₂, HI

D
HIO₄, ICl₅, I₂ ,HI

Solution
Question 9
4 / -1

Which of the following represents the correct order of increasing p K_a values of the given acids?

A
HClO₄ < HNO₃ < H₂CO₃ < B(OH)₃

B
HNO₃ < HClO₄ < B(OH)₃ < H₂CO₃

C
B(OH)₃ < H₂CO₃ < HClO₄ < HNO₃

D
HClO₄ < HNO₃ < B(OH)₃ < H₂CO₃
Question 10
4 / -1

Arrange the acids (I) H₂SO₃, (II) H₃PO₃ and (III) HClO₃ in the decreasing order of acidity

A
I > III > II

B
I > II > III

C
III > II > I

D
II > III > I