MCQ Class 10 Science Periodic Classification of Elements with Answers

CBSE Class 10 Science Chapter 5 Periodic Classification of Elements Multiple Choice Questions with Answers. MCQ Class 10 Science Periodic Classification of Elements with Answers was Prepared Based on Latest Exam Pattern. Students can solve NCERT Class 10 Science Periodic Classification of Elements MCQs with Answers to know their preparation level.

Multiple Choice Questions - Set - 1

Question 1:

Which of the following elements has 2 shells and both are completely filled?

a) Helium

b) Neon

c) Calcium

d) Boron

Check Answer

Correct Answer – (B)

Question 2 :

Element X forms a chloride with the formula XCl₂, which is a solid with a high melting point. X would most likely be in the same group of the Periodic Table as

a) Na

b) Mg

c) Al

d) Si

Check Answer

Correct Answer – (B)

Group 2 alkaline earth metal atoms have two valence electrons each. They can donate their two valence electrons to two other chlorine atoms to form the solid compounds of the form XCl₂.

This XCl₂compound being ionic in nature, has a very strong electrostatic forces of attraction between 2 chloride atoms and 1 metal atom. Thus a large amount of heat is required to break these strong bonds, causing the compound to have very high melting and boiling points.

Question 3 :

What is the other name for group 18^th elements?

a) Noble gases

b) Alkali metals

c) Alkali earth metals

d) Halogens

Check Answer

Correct Answer – (A)

Group 18^th elements are named as noble gases as they are very stable due to having the maximum number of valence electrons their outermost shell can hold, hence they rarely react with other elements.

Question 4 :

The electronic configuration of an element M is 2, 8, 4. In modern periodic table, the element M is placed in

a) 4^th group

b) 2^nd group

c) 14^th group

d) 18^th group

Check Answer

Correct Answer – (C)

Question 5 :

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

Check Answer

Correct Answer – (B)

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.

Question 6 :

Which group elements are called transition metals?

a) Group number 1 to 2

b) Group number 13 to 18

c) Group number 3 to 12

d) Group number 1 to 8

Check Answer

Correct Answer – (C)

Question 7 :

Which of the following is the most reactive element of the group 17?

a) Oxygen

b) Sodium

c) Fluorine

d) Magnesium

Check Answer

Correct Answer – (C)

As we move down in a group, the size of the atoms of elements goes on increasing. So, fluorine being on the top position in the halogen’s group, is the smallest element and has the maximum tendency to gain an electron to complete its octet. Thus fluorine is the most reactive element of the group 17.

Question 8 :

Which of the following is the correct order of the atomic radii of the elements oxygen, fluorine and nitrogen?

a) O < F < N

b) N < F < O

c) O < N < F

d) F < O < N

Check Answer

Correct Answer – (D)

Oxygen (8), fluorine (9) and nitrogen (7) belong to the same period of the periodic table, in the order nitrogen, oxygen and fluorine. Now in a period, on moving from left to right the atomic radius of the elements decreases. Therefore, the atomic radius of nitrogen is the largest.

Question 9 :

What happens to the electropositive character of elements on moving from left to right in a periodic table?

a) Increase

b) Decreases

c) First increases than decreases

d) First decreases than increases

Check Answer

Correct Answer – (B)

Electropositive character of an element is its ability to lose electrons and form positive ions. Now, as on moving from left to right in a period of periodic table, the nuclear charge increases due to the gradual increase in number of protons, so the valence electrons are pulled more strongly by the nucleus. Thus, it becomes more and more difficult for the atoms to lose electrons causing a decrease in the electropositive character of elements on moving from left to right in a periodic table.

Question 10 :

How many periods and groups are present in the periodic table?

a) 7 periods and 18 groups

b) 8 periods and 7 groups

c) 7 periods and 7 groups

d) 8 periods and 8 groups

Check Answer

Correct Answer – (A)

NCERT Solutions & Download NCERT Textbooks

Multiple Choice Questions – Chapter 4 – Carbon and Its Compounds

MCQ Class 10 Science Periodic Classification of Elements with Answers

Multiple Choice Questions - Set - 1

Correct Answer – (B)

Correct Answer – (B)

Correct Answer – (A)

Correct Answer – (C)

Correct Answer – (B)

Correct Answer – (C)

Correct Answer – (C)

Correct Answer – (D)

Correct Answer – (B)

Correct Answer – (A)

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