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Class 11 Chemistry (Part I) Chapter 3 Classification Of Elements And Periodicity In Properties Quiz 3 (25 MCQs)

Quiz Instructions

Select an option to see the correct answer instantly.

1. PCl5 is possible but not NCl5 because .....

Correct Answer: C) Because Phosphorus have vacant d orbital.

2. The most significant contribution towards the development of periodic table was made by

Correct Answer: A) Mendeleev.

3. The noble gases are unreactive because

Correct Answer: B) They have a full outer shell of electrons.

4. Helium is not a p block element because

Correct Answer: A) It's last electron enter into s orbital.

5. The element with atomic number 113 has recently been discorvered. Its electronic configuration is similar to that of

Correct Answer: B) Ga.

6. French geologist A.E.B.de Chancourtois arranged the then known elements in order of ..... and made a ..... table of elements to display the periodic recurrence of properties.

Correct Answer: A) Increasing atomic weights; cylindrical.

7. According to the periodic Law of elements, the variation in properties of elements is related to their

Correct Answer: B) Atomic number.

8. The atom of smallest atomic radius among the following is

Correct Answer: C) Br.

9. Mendeleev classified elements in

Correct Answer: C) Six periods and eight groups.

10. The correct order of electronegativity is

Correct Answer: B) F > O > Cl > Br.

11. Considering the elements F, Cl, O and N, the correct order of their chemical reactivity in terms of oxidizing property is:

Correct Answer: B) B) F > O > Cl > N.

12. In the modem periodic table, the period indicates the value of

Correct Answer: C) Principal quantum numbe.

13. The old periodic law states that the properties of the elements are a periodic function of their

Correct Answer: C) Atomic weights.

14. Silicon and antimony belongs to group .....

Correct Answer: A) 14 &15.

15. According Modern periodic law the chemical and physical property of the elements are the periodic function of .....

Correct Answer: C) Atomic Number.

16. Which oxide is amphoteric in nature?

Correct Answer: C) Both Al2O3 and ZnO.

17. Gennelly non metal oxides are .....

Correct Answer: A) Acidic in nature.

18. ..... has highest electronegativity

Correct Answer: B) Fluorine.

19. From left to right across a period the ionization enthalpy .....

Correct Answer: A) Increases.

20. Newlands could classify elements only upto

Correct Answer: C) Calcium.

21. Which of the reactions will need the maximum amount of energy?

Correct Answer: C) K+ $\rightarrow$ K+ ++ e-.

22. The common option state of 18 group element will be .....

Correct Answer: A) Zero and eight.

23. Which group of elements indicate the doberenier triads?

Correct Answer: D) Li, Na, K.

24. F-block elements are collectively called as

Correct Answer: C) Inner transition element.

25. When Mg reacts with N it forms

Correct Answer: D) Mg3N2.

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