Periodic Classification of Elements MCQs: 10 Science Ch 5

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

Class:	10th Class
Subject:	Science
Chapter:	Chapter 05: Periodic Classification of Elements
Quiz:	– Questions
MCQs:	25 Questions

Periodic Classification of Elements MCQs

Class 10 Science Periodic Classification of Elements MCQs with Answers & Explanation:

1. Newlands relation is called

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

2. Upto which element, the Law of Octaves was found applicable?

(a) Oxygen
(b) Calcium
(c) Cobalt
(d) Potassium

3. 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

4. At the time of Mendeleev, the number of elements known was

(a) 63
(b) 65
(c) 62
(d) 64

5. The properties of eka-aluminium predicted by Mendeleev are the same as the properties of later discovered element:

(a) Scandium
(b) Germanium
(c) Gallium
(d) Aluminium

6. An atom of an element has the electronic configuration 2,8,2. To which group does it belong?

(a) 4^th group
(b) 6^th group
(c) 3^rd group
(d) 2^nd group

7. 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

8. Where would you locate the element with electronic configuration 2, 8 in the Modern Periodic Table?

(a) Group 8
(b) Group 2
(c) Group 18
(d) Group 10

9. Element ‘X’ forms a chloride with the formula XCl₂, which is a solid with high melting point. X would most likely be in the same group of the periodic table as:

(a) Si
(b) Mg
(c) Al
(d) Na

10. Which of these belong to the same period?

(a) A, B
(b) B, C
(c) C, A
(d) A, B and C

Periodic Classification of Elements MCQs: 10 Science Ch 5

11. 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

12. Pick out the chemically most reactive elements from the given triads.
Li, Na, K F, Cl, Br

(a) Li and F
(b) Li and Br
(c) K and F
(d) K and Br

13. What is the atomic number of element of period 3 and group 17 of the Periodic Table?

(a) 10
(b) 4
(c) 17
(d) 21

14. 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

15. 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

16. An element X from group 2 of the Periodic Table reacts with Y from group 17 to form a compound. Give the formula of the compound.

(a) XY₂
(b) XY
(c) X₂Y
(d) (XY)₂

17. A metal ‘M’ is in the first group of the Periodic Table. What will be the formula of its oxide?

(a) MO
(b) M₂O
(C) M2O₃
(d) MO₂

18. 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

19. An element X combines with oxygen to form an oxide XO. This oxide is electrically conducting. Write the formula of the compound formed when X reacts with chlorine.

(a) XCl₃
(b) XCl
(c) XCl₂
(d) XCl₅

Periodic Classification of Elements MCQs – 20. 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

21. Consider the following elements
₂₀Ca, ₈Or ₁₈Ar, ₁₆S, ₄Be, ₂He
Which of the above elements would you expect to be in group 16 of the Periodic Table?

(a) ₂₀Ca and ₁₆S
(b) ₂₀Ca and ₈O
(c) ₁₈Ar and ₁₆S
(d) ₈O and ₁₆S

22. 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

23. 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.

24. 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

Periodic Classification of Elements MCQs – 25. The atom of an element has electronic configuration 2, 8, 7. To which of the following elements would it be chemically similar?

(a) N(7)
(b) P(15)
(c) Na(11)
(d) F (9)