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Class 10 Science Chapter 5 Periodic Classification Of Elements Quiz 4 (25 MCQs)

Quiz Instructions

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1. Which group of the periodic table is composed of inert (not reactive) gases?

Correct Answer: D) Noble gases.

2. Electronegative character ..... down the group

Correct Answer: B) Decreases.

3. Which among the following has the highest effective nuclear charge?

Correct Answer: D) F.

4. The basis of modern periodic law is .....

Correct Answer: A) Atomic number.

5. In the periodic table, the metallic character of elements .....

Correct Answer: B) Decreases from left to right and increases down the group.

6. What type of oxide would Eka-aluminium form?

Correct Answer: B) Hide.

7. What is the small group of elements called that include C, N, O

Correct Answer: B) Nonmetals.

8. The three imaginary elements X, Y and Z represent a dobereiner triad. If the atomic mass of element X is 14 and that of element Y is 46 then atomic mass of elements Z will be

Correct Answer: C) 78.

9. Each column in the periodic table is called .....

Correct Answer: B) Group.

10. Which of the following set of elements are arranged in increasing order of non metallic character?

Correct Answer: B) Br, Cl, F.

11. Among noble gases, which noble gas forms maximum number of compunds

Correct Answer: D) Car.

12. The elements with atomic numbers 2, 10, 18, 36, 54 and 86 are all

Correct Answer: B) Nobel gases.

13. Nonmetals are on the:

Correct Answer: B) Right Side.

14. A horizontal row of elements in the periodic table.

Correct Answer: C) Period.

15. Among the following, the atom with the smallest size is:

Correct Answer: D) F.

16. To complete the octate, outer most shell of Magnesium .....

Correct Answer: A) Looses two electrons.

17. The three elements having chemical symbols of Si, B and Ge are-

Correct Answer: C) All metalloids.

18. The long form of periodic table consists of .....

Correct Answer: B) Seven periods & eighteen groups.

19. ..... is a relative periodic property

Correct Answer: D) Electronegativity.

20. An element belongs to period 2 and group 2 the number of valence electrons in the atoms of this element is

Correct Answer: A) 2.

21. The atomic radius (covalent radius) of hydrogen atom is

Correct Answer: C) 37 picometer.

22. Where are the metaloids found

Correct Answer: B) Stair step/diagonal.

23. According to Modern periodic law, the properties of elements are the periodic functions of 'X' ; Identify 'X'.

Correct Answer: A) Atomic no of elements.

24. In which order do we need to put sodium, potassium, lithium, for Dobereiner's Law of Triads?

Correct Answer: A) Lithium, sodium, potassium.

25. Which one of the following does not increase while moving down the group of the periodic table?

Correct Answer: C) Valence electron.

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