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

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

2 / 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

3 / 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

4 / 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

5 / 15

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

Group 1

Group 14

Group 15

Group 16

6 / 15

Organise the following elements in the order of their decreasing metallic character Na, Si, Cl, Mg, Al:

Cl > Si > Al > Mg > Na

Na > Mg > Al > Si > Cl

Na > Al > Mg > Cl > Si> Ca > Mg

Al > Na > Si

7 / 15

Which of the following elements would lose an electron with ease?

Mg

Na

K

Ca

8 / 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

9 / 15

Arrange these elements in decreasing order of their atomic radii

Carbon Nitrogen Oxygen Fluorine

Fluroine oxygen carbon Nitrogen

Nitrogen Oxygen Carbon Fluroine

Oxygen Nitrogen Fluroine Carbon

10 / 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

11 / 15

The valency of an element vary across a period

increases

Decreases

Remains constant

increases/decreases

12 / 15

How many metals are present in second period of periodic table?

10

6

8

2

13 / 15

The number of groups in the Modern Periodic Table

18

14

12

10

14 / 15

Is calcium?

metal

non metal

both

none of these

15 / 15

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

F < C < O < Be < Li

F < O < C < Be < Li

Li < Be < C < O < F

Li < Be < C < F < O

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Science : Ch 05 – Periodic of Classification of Elements

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