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

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

Group 8

Group 2

Group 18

Group 10

2 / 15

Which of the following gives the accurate increasing order of the atomic radii of O, F and N?

O, F, N

N, F, O

O, N, F

F, O, N

3 / 15

Which of the following elements does not lose an electron with ease?

Na

F

Mg

Al

4 / 15

The element with atomic number 14 is hard and forms acidic oxide and a covalent halide. To which of the following classification does the element belong?

Metal

Metalloid

Non-metal

Left-hand side element

5 / 15

What type of oxide would Eka-aluminium form?

EO₃

E₃O₂

E₂O₃

EO

6 / 15

Arrange these elements in decreasing order of their atomic radii

Lithuim Boron Berium

Berium Lithium Boron

Lithium Beium Boron

Boron Lithuim Berum

7 / 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

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 one of the following does not increase while moving down in group of the periodic table?

Atomic radius

Metallic character

Valence

Number of shells in an element

10 / 15

The formulae of chlorides of Eka-aluminium, the elements predicted by Mendeleev.

GaCl₄

GaCl₂

GaCl

GaCl₃

11 / 15

The number of Periods in the Modern Periodic Table are

6

7

2

1

12 / 15

The number of groups in the Modern Periodic Table

18

14

12

10

13 / 15

The atomic number of an element is 20, its electronic configuration.

2, 8, 4, 2,

2, 8, 8, 2,

4, 8, 8, 2,

8, 8, 2,2

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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