Class 10 Science MCQ Chapter 5 Periodic Classification of Element

Class 10 Science MCQ Chapter 5 Periodic Classification of Element, Class 10 Science MCQ Question Answer, Class 10 Science Multiple Choice Question Answer to each chapter is provided in the list of SCERT Science Class 10 Objective Types Question Answer so that you can easily browse through different chapters and select needs one. Class 10 Science MCQ Chapter 5 Periodic Classification of Element Question Answer can be of great value to excel in the examination.

SCERT Class 10 Science MCQ Chapter 5 Periodic Classification of Element

SCERT Class 10 General Science MCQ Chapter 5 Periodic Classification of Element Notes covers all the exercise questions in SCERT Science Textbooks. The NCERT Class 10 Science MCQ Chapter 5 Periodic Classification of Element provided here ensures a smooth and easy understanding of all the concepts. Understand the concepts behind every chapter and score well in the board exams.

Periodic Classification of Element

Chapter – 5

Multiple Choice Questions & Answers

1. Find out the metalloid from the following elements-

(a) Sodium.

(b)  Aluminium.

(c) Chlorine.

(d) Boron.

Ans: (d) Boron.

2. In a period of the periodic table of elements, on moving from left to right the atomic radius-

(a) Increases.

(b) decreases.

(c) Remains same.

(d) None of the above.

Ans: (b) decreases.

3. Which one of the following is a Dobereiner’s triads?

(a) Li, Na, Ca

(b) K, Sr, Ba

(c) Ca, Sr, Be 

(d) Cl, Br, I

Ans: (d) Cl, Br, I

4. The atomic number of an elements is more fundamental property than its atomic mass-Who put forward this statement?

(a) Mendeleev.

(b) Dobereiner.

(c) Bohr.

(d) Henry Moseley.

Ans: (d) Henry Moseley.

5. Elements of second period are Li, Be, B, C, N, O, F and Ne-which one of these has the largest atom?

(a) Li 

(b) Be 

(c) Ne 

(d) F

Ans: (a) Li

6. Among the elements from the first group Li, Na, K, Rb, Cs and Fr-which one has the larg- est atom?

(a) Rb 

(b) Cs 

(c) Li 

(d) Fr

Ans: (d) Fr

7. In Modern Periodic Table. When we move from top to bottom in a group the atomic size of the elements-

(a) Increases.

(b) decreases.

(c) Remains same.

(d) None of the above.

Ans: (a) Increases.

8. When we move from top to bottom in a group in Modern Periodic Table, the valency of elements –

(a) decreases.

(b) Increases. 

(c) Remains same.

(d) None of the above.

Ans: (c) Remains same.

9. When we move from left to right Across a period in Modern Periodic Table, the valency of elements-

(a) decreases.

(b) Increases. 

(c) Remains same.

(d) First increases, then starts to decrease.

Ans: (d) First increases, then starts to decrease.

10. The tendency of elements to lose electrons (Metallic or electroposi- tive property) in a group of periodic table-

(a) Decreases.

(b) Increases.

(c)  Remain same.

(d) None of the above.

Ans: (b) Increases.

11. The tendency of elements to lose electrons (Metallic property) in a period of periodic table-

(a) Decreases.

(b) Increases.

(c)  Remain same.

(d) None of the above.

Ans: (a) Decreases.

12.  When we move from left to right across a period in the periodic table, the tendency of elements to gain electrons (Non-metallic or electronegative property)-

(a) Decreases.

(b) Increases.

(c)  Remain same.

(d) None of the above.

Ans: (b) Increases.

13. The tendency of elements to gain electrons (Non-metallic prope erty) in a group as we go from top to bottom in the periodic table-

(a) Decreases.

(b) Increases.

(c)  Remain same.

(d) None of the above.

Ans: (a) Decreases.

14. The formula of the oxide of the element K using Mendeleev’s Periodic table is-

(a) KO₂

(b) K₂O

(c) K₂O₃

(d) KO

Ans: (b) K₂O

15. An elements X forms compound with formula X₂O by reacting with oxygen, Element X is likely to be in the same group of the periodic table

(a) Na 

(b) Mg

(c) Al

(d) Si

Ans: (a) Na