Chemical Periodicity Test

Result

Chemical Periodicity Test - 5

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
4 / -1

Acidity of pentoxides in VA group

A
Decreases

B
Increases

C
Remains same

D
None

Solution

Basic or metallic character of pentaoxides in VA group increases down the group. Hence acidity decreases.
Question 2
4 / -1

Pentavalence in phosphorus is more stable when compared to that of nitrogen even though they belong to same group is due to :

A
reactivity of phosphorus

B
inert nature of nitrogen

C
hydrogen and sulphurous acid

D
large size of phosphorus atom

Solution

Pentavalence in phosphorus is more stable when compared to that of nitrogen even though they belong to same group is due to large size of phosphorus atom and greater ability to accommodate electrons.
Question 3
4 / -1

Oxidising action increases in halogen in the following order

A
Cl < Br < I < F

B
Cl < I < Br < F

C
I < F < Cl < Br

D
I < Br < Cl < F

Solution

Tendency to gain e⁻ and oxidising power are related. Among halogens F is the directly most powerful oxidising agent.
Question 4
4 / -1

An element X which occurs in the first short period has an outer electronic structure s²p¹. What are the formula and acid-base character of its oxides

A
XO₃, basic

B
X₂O₃, basic

C
X₂O₃, amphoteric

D
XO₂, acidic

Solution

B₂O₃,Al₂O₃are amphoteric oxides.
Question 5
4 / -1

Hydrogen by donating one electron forms H⁺. In this property, it resembles with

A
Transitional metals

B
Alkaline earth metals

C
Alkali metals

D
Halogens

Solution

As alkali metals have tendency to loose e⁻.
Question 6
4 / -1

The properties of the elements are the, periodic function of their atomic numbers. This statement was given by

A
N. Bohr

B
J.w. Dobereiner

C
D.I. Mendeleev

D
H.G.J. Moseley

Solution

Moseley's contribution to the science was the justification from physical laws of the previous empirical and chemical concept of atomic number. He justified many concepts in chemistry by sorting the chemical elements of periodic table of elements in a logical order.
Question 7
4 / -1

The properties of Li are similar to those of Mg. This is because:

A
both have nearly the same size.

B
both has their charge to size ratio nearly the same.

C
both have similar electronic configurations.

D
both are found together in nature.
Solution
- The properties of lithium are similar to those of Mg because they are having diagonal relationship.
- The elements having diagonal relationship show similar properties and the reason is because the both of them will have similar electronegativity and polarising power i.e. charge per size ratio of both the elements are nearly the same.
Question 8
4 / -1

Elements after atomic number 103 have not been discovered till now. If an element with atomic number 106 were ever discovered which of the following electronic configuration will it possess.

A
[Rn]5f¹⁴6d⁴7s¹

B
[Rn]5f¹⁴6d⁵7s¹

C
[Rn]5f¹⁴6d⁶7s⁰

D
[Rn]5f¹⁴6d¹7s²7p³

Solution
Question 9
4 / -1

In the modern periodic table, elements are arranged in

A
Increasing mass

B
Increasing volume

C
Increasing atomic number

D
Alphabetically

Solution

Increasing atomic number. Mosley found that atomic no. was better fundamental property than atomic weight.
Question 10
4 / -1

Ce(58) is a member of:

A
s-block

B
p-block

C
d-block

D
f-block

Solution

The electronic configuration of Ce is [Xe]4f¹5d¹6s².

Since the electron has entered the f orbital, Ce is an f block element.

User

Question Analysis

Correct -
Wrong -
Skipped -

My Perfomance

Score
-
out of -
Rank
-
out of -

Re-Attempt Weekly Quiz Competition

Chemical Periodicity Test - 5

Result

Chemical Periodicity Test - 5

Score

-

Rank

-

SHARING IS CARING

Question 1

Decreases

Increases

Remains same

None

Solution

Question 2

reactivity of phosphorus

inert nature of nitrogen

hydrogen and sulphurous acid

large size of phosphorus atom

Solution

Question 3

Cl < Br < I < F

Cl < I < Br < F

I < F < Cl < Br

I < Br < Cl < F

Solution

Question 4

XO3, basic

X2O3, basic

X2O3, amphoteric

XO2, acidic

Solution

Question 5

Transitional metals

Alkaline earth metals

Alkali metals

Halogens

Solution

Question 6

N. Bohr

J.w. Dobereiner

D.I. Mendeleev

H.G.J. Moseley

Solution

Question 7

both have nearly the same size.

both has their charge to size ratio nearly the same.

both have similar electronic configurations.

both are found together in nature.

Solution

Question 8

[Rn]5f146d47s1

[Rn]5f146d57s1

[Rn]5f146d67s0

[Rn]5f146d17s27p3

Solution

Question 9

Increasing mass

Increasing volume

Increasing atomic number

Alphabetically

Solution

Question 10

s-block

p-block

d-block

f-block

Solution

User

Question Analysis

My Perfomance

Score

-

Rank

-

Results Announcement on: coming Monday

Stay Tuned: We’ll update you on your result via email or SMS.

XO₃, basic

X₂O₃, basic

X₂O₃, amphoteric

XO₂, acidic

[Rn]5f¹⁴6d⁴7s¹

[Rn]5f¹⁴6d⁵7s¹

[Rn]5f¹⁴6d⁶7s⁰

[Rn]5f¹⁴6d¹7s²7p³