Class 10 Science Chapter 5 MCQ

Class 10 Science Chapter 5 MCQ (Multiple Choice Questions) of Periodic Classification of Elements. Revise all the chapter here in the form of MCQ Online tests. All the MCQs are taken from NCERT books only and answer as well as explanation are given below each question.

After completing the chapter from textbooks, these MCQs are very helpful for the preparation of school tests and final board exams.




Class 10 Science Chapter 5 MCQ for 2020-2021

Class: 10Science
Chapter: 5Multiple Choice Questions (MCQ) Tests

Class 10 Science Chapter 5 MCQ with Answers

MCQ tests practice for class 10 science is given below. Here, you can practice chapter 5 of class 10 science with important MCQs related to NCERT Textbook. Class 10 Science Chapter 5 MCQs are given below with answers and explanation.

Q1

Lavish appeared in class test but he confused to know the correct statement. Would you help him to know that?

[A]. The elements calcium, strontium and barium were put in one group called alkaline earth metal group or alkaline.
[B]. The elements calcium, strontium and barium have similar chemical properties and form a triad.
[C]. The elements calcium, strontium and barium have a valency of 2 (they are divalent).
[D]. All the above.
Q2

Consider the following statements and choose the incorrect one:

[A]. In Mendeleev’s periodic table, the elements are arranged on the basis of their atomic masses, atomic numbers and also on the similarity of chemical properties.
[B]. Dobereiner’s triads did not exist in the columns of Newlands’ classification of elements based on the law of octaves
[C]. The periodic table is a chart of elements prepared in such a way that the elements having different properties occur in the same vertical column but similar in group.
[D]. All the above.




Q3

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
Q4

Read the following sentences carefully, and choose the incorrect one(s):

[A]. The horizontal rows of elements in a periodic table are called periods.
[B]. All other periods start with noble gases like neon, argon, krypton, etc. and end with alkali metals like lithium, sodium, potassium, etc.,
[C]. The elements in a period have consecutive (continuous) atomic numbers.
[D]. The figures 2, 8, 18, 32, etc., representing the maximum number of electrons which can be put in the various shells of the atoms.



Q5

In a quiz competition, you are asked a question where you have to choose the statement which is/ are incorrect?

[A]. The modern periodic law is based on the atomic numbers of elements.
[B]. In the modern periodic law the electronic configuration of sodium is similar to that of lithium
[C]. The electronic configuration of silicon is 2, 8, 6.
[D]. When the elements are arranged according to increasing atomic numbers, then the elements having same number of valence electrons occur at regular intervals (or periods).
Q6

Which among the following elements has the largest atomic radii?

[A]. Ca
[B]. Na
[C]. Mg
[D]. K



Q7

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 same group?

[A]. A and B
[B]. B and D
[C]. A and C
[D]. D and E
Q8

Which of the following statements about the Modern Periodic Table is correct?

[A]. It has 18 horizontal rows known as Periods.
[B]. It has 7 vertical columns known as Periods.
[C]. It has 18 vertical columns known as Groups.
[D]. It has 7 horizontal rows known as Groups.
Q9

Sunakshi is completed her science chapter where she wrote some statements on “Periodic Table”. She wants to know whether the statements are correct or not? Sunakshi wants to take help from you:

[A]. In group 1 consists of alkali metals lithium, sodium, potassium, etc., all having 1 valence electron in their atoms.
[B]. In group 17 contains halogens like fluorine, chlorine, bromine and iodine, etc., all having 7 valence electrons.
[C]. Group 18 elements are known as noble gases or inert gases, all having 8 electrons in their outermost shells (except helium which has only 2 electrons in the K valence shell).
[D]. All the above.
Q10

Which of the following statement(s) about the Modern Periodic Table are incorrect?

[A]. The elements in the Modern Periodic Table are arranged on the basis of their decreasing atomic number.
[B]. The elements in the Modern Periodic Table are arranged on the basis of their decreasing atomic number, the elements in the Modern Periodic Table are arranged on the basis of their increasing atomic masses, Isotopes are placed in adjoining group (s) in the Periodic Table.
[C]. The elements in the Modern Periodic Table are arranged on the basis of their decreasing atomic number, the elements in the Modern Periodic Table are arranged on the basis of their increasing atomic masses, the elements in the Modern Periodic Table are arranged on the basis of their increasing atomic number.
[D]. The elements in the Modern Periodic Table are arranged on the basis of their increasing atomic number.



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