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 is forming acidic oxide. Its most expected position in the modern periodic table is:

Group 1 and Period 3

Group 16 and Period 3

Group 17 and Period 3

Group 2 and Period 3

2 / 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

3 / 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

4 / 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

5 / 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

6 / 15

Three elements B, Si and Ge are:

Metals

Non-metals

Metalloids

Metal, non-metal and metalloid

7 / 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

8 / 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

9 / 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

10 / 15

Which among the following has larger size of atoms?

Li

Fr

Na

Be

11 / 15

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

K shell

L shell

M shell

N shell

12 / 15

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

GeCl

GeCl2

GeCl4

GeCl3

13 / 15

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

GaCl₄

GaCl₂

GaCl

GaCl₃

14 / 15

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

F < N < Be < Li.

F < N < Li < Be.

Li < F < Be < N.

15 / 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

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Science : Ch 05 – Periodic of Classification of Elements

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