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

Which of the following affirmation about the modern periodic table are inappropriate?

The elements in the modern periodic table are arranged on the basis of their decreasing atomic numbers

The elements in the modern periodic table are arranged on the basis of their increasing atomic masses.

Isotopes are placed in adjoining group(s) in the periodic table.

The elements in the modern periodic table are arranged on the basis of their increasing atomic number

1,2 and 3

1 and 2

2 and 3

3

3 / 15

An element X with atomic number 12 forms a compound with element Y with atomic number 17. The formula of the compound formed is:

XY

XY₂

X₂Y

X₂Y₃

4 / 15

Which of the specified elements A, B, C, D and E with atomic number 2, 3, 7, 10 and 30 respectively affiliated to the same period?

A, B, C

B, C, D

A, D, E

B, D, E

5 / 15

The elements A, B, C, D and E have atomic number 9, 11, 17, 12 and 13 respectively. Which pair of elements belongs to the identical group?

A and B

B and D

A and C

D and E

6 / 15

In Mendeleev’s periodic table, gaps were left for the elements to be discovered later. Which of the subsequent element found a place in the periodic table later?

Germanium

Chlorine

Oxygen

Silicon

7 / 15

Where would you establish the element with electronic confguration 2, ǫ in the modern periodic table?

Group 8

Group 2

Group 18

Group 10

8 / 15

As claimed by Mendeleev’s periodic law, the elements were arranged in the periodic table in the order of:

Increasing atomic number

Decreasing atomic number

Increasing atomic masses

Decreasing atomic masses

9 / 15

Which of the subsequent is the outermost shell for elements of period 2?

K shell

L shell

M shell

N shell

10 / 15

The electronic confgurations of three elements X, Y and Z are: X : 2 Y : 2, 8, 7 Z : 2, 8, 2 Which of the following is true regarding these elements?

X is a metal

Y is a metal

Z is a non-metal

Y is a non-metal and Z is a metal

11 / 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

12 / 15

Arrange the following elements in sequence of their increasing non-metallic character Li, O, C, Be and F.

F < O < C < Be < Li

Li < Be < C < O < F

F < O < C < Be < Li

F < O < Be < C < Li

13 / 15

Why does atomic radius decreases as we move from left to right in a period

due to increase in nuclear charge which tends to pull the electrons closer to the nucleus.

due to decrease in nuclear charge which tends to pull the electrons closer to the nucleus.

due to no change in nuclear charge which tends to pull the electrons closer to the nucleus.

none of these

14 / 15

The metallic character vary across the period

It moves right to left in peroidic table

It moves left to right in peroidic table

Remains constant

none of these

15 / 15

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

2

8

16

4

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Science : Ch 05 – Periodic of Classification of Elements

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