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Class 10 Science Chapter 5 Periodic Classification Of Elements Quiz 3 (25 MCQs)

Quiz Instructions

Select an option to see the correct answer instantly.

1. Which is a halogen?

Correct Answer: B) Chlorine.

2. The most abundant noble gas in earth's atmosphere is

Correct Answer: C) Argon.

3. The electronic configuration of element X is 2, 8, 8, 1 and the electronic configuration ofelement Y is 2, 8, 7. Then the type of bond formed between these twoelements is .....

Correct Answer: D) Ionic bond.

4. In the modern periodic table, what is the classification of elements based on?

Correct Answer: A) Atomic number.

5. In the modern periodic table elements are arranged by .....

Correct Answer: B) Atomic number.

6. Elements of which group are also known as Chalcogens

Correct Answer: C) Gr 16.

7. ..... group contains the member ofhalogen family.

Correct Answer: A) 17th.

8. Which of the following elements are placed separately at the bottom of the periodic table?

Correct Answer: C) Inner transition elements.

9. The atomic numbers of elements A, B, C and D are 3, 9, 4 and 8 respectively. Elementshavingmetallic nature among these are .....

Correct Answer: B) A and C.

10. How many periods are there in Modern Periodic table?

Correct Answer: B) 7.

11. An atom of an element has the electronic confi-guration 2, 8, 2. To which group does it belong?

Correct Answer: D) 2nd group.

12. The 'law of octaves' was enunciated by .....

Correct Answer: D) Newlands.

13. Which of these is NOT a limitation of Newlands' law?

Correct Answer: B) He arranged them in an order of increasing atomic mass.

14. Modern periodic table is based on .....

Correct Answer: A) Atomic number.

15. The Newlands' law of octaves for the classification of elements was found to be applicable only up to the ..... element

Correct Answer: B) Calcium.

16. The number of valence electrons present in nitrogen atom .....

Correct Answer: A) 5.

17. 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 .....

Correct Answer: B) Mg.

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

Correct Answer: A) 63.

19. What group number are the noble gases

Correct Answer: B) 18.

20. In order to fill the periodic table, Newlands place two elements together in a slot The 2 elements were

Correct Answer: D) Cobalt and nickel.

21. Which one of the following is a Dobereiner Triad?

Correct Answer: C) Li, on, k.

22. Which among the following elements has the largest atomic radii?

Correct Answer: C) K.

23. Which of the blocks on the periodic table contains the most elements?

Correct Answer: C) D block.

24. Eka boron is

Correct Answer: C) Scandium.

25. Which was the first classification of elements?

Correct Answer: C) Metal and non metal.

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