Science : Ch 05 – Periodic of Classification of Elements

This test is designed based on NCERT Syllabus for Class 10 Topics : Periodic of Classification of Elements

Each time random 15 questions will be displaced
So retake the quiz till you have mastered all the questions

1 / 15

Which of the following declaration about the modern periodic table is accurate?

It has 18 horizontal rows known as periods.

It has 7 vertical columns rows known as periods

It has 18 vertical columns known as groups.

It has 7 horizontal rows known as groups.

2 / 15

On the basis of electronic confguration of X9 5 , the group number and period of the element ‘X‘ is:

Group 15 period 2

Group 13 period 2

Group 9 period 5

Group 13 period 5

3 / 15

An element which is a crucial constituent of all organic compounds belongs to:

Group 1

Group 14

Group 15

Group 16

4 / 15

Which of the following are the characteristics of isotopes of an element?

Isotopes of an element have the same atomic masses.

Isotopes of an element have the same atomic number

Isotopes of an element show the same physical properties.

Isotopes of an element show the same chemical properties.

2 and 4

1 and 3

2 and 3

1 and 4

5 / 15

What type of oxide would Eka-aluminium form?

EO₃

E₃O₂

E₂O₃

EO

6 / 15

Which of the subsequent set of elements is written in sequence of their increasing metallic character?

Be, Mg, Ca

Na, Li, K

Mg, Al, Si

C, O, N

7 / 15

Arrange these elements in decreasing order of their atomic radii

Lithuim Boron Berium

Berium Lithium Boron

Lithium Beium Boron

Boron Lithuim Berum

8 / 15

Which is not true about the noble gases?

They exist in atomic form

They are non metallic in nature

Xenon is the most reactive.

They are radioactive in nature

9 / 15

Which of the following is the outermost shell for elements of period 2

K shell

L shell

M shell

N shell

10 / 15

The valency of an element vary across a period

increases

Decreases

Remains constant

increases/decreases

11 / 15

The number of Periods in the Modern Periodic Table are

6

7

2

1

12 / 15

Arrange the following elements in increasing order of their atomic radii:

l < Br < Cl < At

At < Br < I < Cl

Cl < I < Br < At

Cl < Br < I < At

13 / 15

The atomic number of an element is 20, its valency is

2

8

16

4

14 / 15

Is calcium?

metal

non metal

both

none of these

15 / 15

Three elements B, Si and Ge are: Metalloids (d)

Metal

Non metal

Metalloids

Metal, non-metal and metalloid respectively

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Science : Ch 05 – Periodic of Classification of Elements

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