MCQ Questions | Class 10 Science Chapter 5 | Periodic Classification of Elements with Answers

MCQ | Class 10 Science Chapter 5 | Periodic Classification of Elements Set B

Check the below NCERT MCQ Questions for Class 10 Science Chapter 5 Periodic Classification of Elements with Answers Pdf free download. MCQ Questions for Class 10 Science with Answers were prepared based on the latest exam pattern. We have Provided Periodic Classification of Elements Class 10 Science MCQs Questions with Answers to help students understand the concept very well.

Objective Question | Science Class 10 Chapter 5

NCERT Solutions Class 10 Science
Book:	National Council of Educational Research and Training (NCERT)
Board:	Central Board of Secondary Education (CBSE)
Class:	10th
Subject:	Science
Chapter:	5
Chapters Name:	Periodic Classification of Elements
Medium:	English

Class 10th Science Book | Objective Type Questions

You can refer to NCERT Solutions for Class 10 Science Chapter 5 Periodic Classification of Elements to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams.

Periodic Classification of Elements | Class 10 Science | NCERT Solutions

Q1.	Upto which element, the Law of Octaves was found applicable?
	A. Oxygen
	B. Calcium
	C. Cobalt
	D. Potassium

Ans: Calcium

Q2.	As we move from left to right in a period in modern periodic table, Atomic sizes of the elements generally
	A. increase
	B. decrease
	C. remain same
	D. approach zero

Ans: decrease

Q3.	The arrangement of elements in the Modem Periodic Table is based on their
	A. increasing atomic mass in the period
	B. increasing atomic number in the horizontal rows
	C. increasing atomic number in the vertical columns
	D. increasing atomic mass in the group

Ans: increasing atomic number in the horizontal rows

Q4.	Carbon belongs to the second period and Group 14. Silicon belongs to the third period and Group 14. If atomic number of carbon is 6, the atomic number of silicon is
	A. 7
	B. 14
	C. 24
	D. 16

Ans: 14

Q5.	In Mendeleev’s Periodic Table, gaps were left for the elements to be discovered later. Which of the following elements found a place in the Periodic Table later?
	A. Chlorine
	B. Silicon
	C. Oxygen
	D. Germanium

Ans: Germanium

Q6.	The law of the modern periodic table was proposed by:
	A. H.G.I Moselly
	B. Dobereincer
	C. D.I. Mendeleev
	D. Newlands

Ans: H.G.I Moselly

Q7.	The elements A, B and C belong to groups 1, 14 and 17 respectively of the Periodic Table. Which two elements will form ionic compounds?
	A. A and B
	B. A and C
	C. B and C
	D. None

Ans: A and C

Q8.	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

Ans: The atoms lose their electrons more easily

Q9.	Name the neutral atom in the Periodic Table which has the same number of electrons as K⁺ and Cl^–.
	A. Helium
	B. Argon
	C. Neon
	D. Krypton

Ans: Argon

Q10.	An element X has mass number 40 and contains 21 neutrons in its atom. To which group of the Periodic Table does it belong?
	A. Group 1
	B. Group 4
	C. Group 2
	D. Group 3

Ans: Group 1

Q11.	How many elements are placed in lanthanide and actinide series?
	A. 57, 89
	B. 14, 14
	C. 89, 57
	D. 14, 16

Ans: 14, 14

Q12.	Which of the following elements of noble gases participate in chemical reaction?
	A. Kr, Rn
	B. He, Kr
	C. Rn, He
	D. He, Ne

Ans: Kr, Rn

Q13.	The element which has least tendency to lose electron is
	A. H
	B. Li
	C. He
	D. Ne

Ans: He

Q14.	The metal which is hard and has high melting point and used in filaments of electrical bulbs is
	A. Ni
	B. Fe
	C. Pt
	D. W

Ans: W

Q15.	Mendeleev’s classification was based on.
	A. Increasing atomic mass
	B. Decreasing atomic number
	C. Increasing atomic number
	D. Decreasing atomic mass

Ans: Increasing atomic mass

Q16.	The elements of group 16 are called
	A. Chalcogens
	B. Halogens
	C. Pnicogens
	D. Noble gases

Ans: Chalcogens

Q17.	Nitrogen and phosphorus belong to the group 15 of the periodic table. Which of these will be more electro negative?
	A. Phosphorus
	B. Both are equally electro negative
	C. Nitrogen
	D. None of these