Class 10 Science MCQ Questions of Periodic Classification of Elements with Answer clear for a fast revision of the Chapter subsequently assisting you with improving Knowledge of the subject. Solving the Periodic Classification of Elements MCQ questions can be of extreme assistance as you will know about all ideas and concepts.

MCQ Questions for Class 10 Science of Periodic Classification of Elements. Revise the chapter here as MCQ Online tests. Every one of the MCQ Questions is taken from all significant topics of the chapter and answer just as clarification is given beneath each question.

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1. Modern Periodic law is based upon:

(a) Number of neutrons
(b) Number of electron
(c) Atomic number
(d) Atomic mass

(c) Atomic number

2. The non-metals are present:

(a) On the right hand side of the periodic table.
(b) In the middle of the periodic table.
(c) In the centre of the periodic table.
(d) On the left hand side of the periodic table.

(a) On the right hand side of the periodic table.

3. An element has 12 protons. The group and period to which this element belongs to is

(a) 2nd group, 3rd period
(b) 2nd group, 2nd period
(c) 3rd group, 2nd period
(d) 3rd group, 3rd period

(a) 2nd group, 3rd period

4. Newlands relation is called

(a) Musical Law
(b) Law of Octaves
(c) Periodic Law
(d) Atomic Mass Law

(b) Law of Octaves

5. Which of the following set of elements is written in order of their increasing metallic character?

(a) Na Li K
(b) C Q N
(c) Mg Al Si
(d) Be Mg Ca

(d) Be Mg Ca

6. Which of the following forms the basis of the modern periodic table?

(a) Atomic mass
(b) Atomic number
(c) Number of nucleons
(d) All of these

(b) Atomic number

Explanation: Modern periodic table is based on the atomic numbers of elements as according to the modern periodic law the properties of elements are a periodic function of their atomic numbers.

7. Which one of the following statements is not correct about the trends in the properties of the elements of a group on going down in a group?

(a) The chemical reactivity of metals increases.
(b) The metallic character of elements increases.
(c) The size of the atom increases.
(d) The valence electrons increase.

(d) The valence electrons increase.

8. An element ‘A’ belongs to the third period and group 16 of the Periodic Table. Find out the valency of A.

(a) Valency = 6
(b) Valency = 2
(c) Valency = 1
(d) Valency = 3

(b) Valency = 2

9. Which of the following is the outermost shell for elements of second period?

(a) K shell
(b) L shell
(c) M shell
(d) N shell

(b) L shell

10. An element belongs to period 2 and group $$2^{th}$$ number of valence electrons in the atoms of this element is.

(a) 2
(b) 4
(c) 3
(d) 1

(a) 2

11. An element with atomic number will form a basic oxide____

(a) 7
(b) 17
(c) 14
(d) 11

(d) 11

12. Which is not true about the noble gases?

(a) They are non metallic in nature
(b) They exist in atomic form
(c) They are radioactive in nature
(d) Xenon is the most reactive among these

(c) They are radioactive in nature

13. Vertical columns are called as –

(a) groups
(b) periods
(c) rows
(d) none

(a) groups

14. The number of electrons in valence shell is equal to –

(a) Atomic mass
(b) Group number
(c) period number
(d) Atomic volume

(b) Group number

15. Which of the following elements will form acidic oxide?

(a) with atomic number 7
(b) with atomic number 3
(c) with atomic number 12
(d) with atomic number 19

(d) with atomic number 19

16. On moving from left to right in a period in the periodic table, the size of the atom

(a) increases
(b) decreases
(c) does not change appreciably
(d) first decreases and then increases.

(b) decreases

17. In modern periodic table, elements are arranged according to their

(a) atomic weight
(b) density
(c) atomic number
(d) melting point

(c) atomic number

18. On moving down a group:

(a) ionic radius decreases
(b) density decreases
(c) electronegativity increases
(d) metallic character increases.

(d) metallic character increases.

19. Modern periodic law is given by:

(a) Mendeleeff
(b) Moseley
(c) Priestly
(d) Davy.

(b) Moseley

20. Which one of the following statements is not correct about the trends in the properties of the elements of a period on going from left to right?

(a) The oxides become more acidic
(b) The elements become less metallic
(c) There is an increase in the number of valence electrons
(d) The atoms lose their electrons more easily