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MCQ On Periodic Classification Of Elements

1. The periodic functions of the __________ are the properties of respective elements.

a) Atomic Weights

b) Atomic Number

c) Chemical properties

d) No of protons

Answer: Atomic Weights

2. Eka Aluminium is _________

a) Germanium

b) Gallium

c) Silicon

d) Copper

Answer: Gallium

3. What are the atomic weights of Aka Silicon and Germanium?

a) 72, 72.6

b) 68, 70

c) 70, 72

d) 68, 72.6

Answer: 72, 72.6

4. In Mendeleev’s periodic classification, what is the number of groups?

a) 12

b) 8

c) 7

d) 6

Answer: 8

5. The ideal gases were in ____ group of Mendeleev’s periodic table.

a) 3rd

b) 4th

c) 1st

d) 2nd

Answer: 1st

6. __________ gave the idea for the first time to classify elements as per their properties.

a) Mendeleev

b) Dobereiner

c) Newland

d) John

Answer: Dobereiner

7. Which of the following is not Dobereiner triad?

a) Li, Na, and K

b) He, Na and Ar

c) Ca, Sr and Ba

d) CL, Br and I

Answer: He, Na and Ar

8. The horizontal rows in Mendeleev’s periodic table were called as __________

a) periods

b) groups

c) series

d) rows

Answer: series

9. In the modern long-form of periodic table, the horizontal rows and the vertical columns are called as __________ and ___________ respectively.

a) groups, periods

b) periods, groups

c) rows, columns

d) columns, rows

Answer: periods, groups

10. The period’s number corresponds to the highest _________

a) Azimuthal quantum number

b) Spin quantum number

c) Magnetic quantum number

d) Principal quantum number

Answer: Principal quantum number

11. Which was the incomplete period in the long-form of the modern periodic table?

a) 7th period

b) 4th period

c) 6th period

d) 2nd period

Answer: 7th period

12. Which of the following period is the shortest one?

a) 1

b) 3

c) 2

d) 4

Answer: 1

13. ____________ observed the X-rays’ characteristics.

a) Henry Moseley

b) Mendeleev

c) Pauli

d) Newland

Answer: Henry Moseley

14. The graph of v√ Vs Z gives a straight line.

a) True

b) False

Answer: True

15. What’s the symbol of the element Unnilquadium?

a) Unl

b) Unq

c) Uns

d) Ubn

Answer: Unq

16. For the 115th element _________ is the name as per IUPAC nomenclature and __________ is the official name.

a) Unnilquadium, Mendelevium

b) Unnilunium, Rutherfordium

c) Ununpentium, Moscovium

d) Moscovium, Ununpentium

Answer: Ununpentium, Moscovium

17. The elements, Unnilhexium and Seaborgium are the same.

a) True

b) False

Answer: True

18. What’s the atomic number of the element Copernicium?

a) 111

b) 112

c) 113

d) 114

Answer: 112

19. What are the roots of 1, 1, and 9 respectively as per the IUPAC nomenclature, and find out its symbol?

a) un, bi, and quad; Ubq

b) nil, bi, and sept; Ubs

c) un, un, and enn; Uue

d) un, bi, and enn; Ube

Answer: un, un, and enn; Uue

20. What is the atomic number of the element unniloctium?

a) 106

b) 118

c) 108

d) 116

Answer: 108

21. Which of the following is not the name of the 104th element?

a) Rutherfordium

b) Kurchatovium

c) Unnilquadium

d) Neptunium

Answer: Neptunium

22. 3d transition series starts from _________ and ends with __________

a) Zinc, Scandium

b) Scandium, Zinc

c) Vanadium, Nickel

d) Argon, Zinc

Answer: Scandium, Zinc

23. Which block elements are known as inner transition elements?

a) s-block

b) p-block

c) d-block

d) f-block

Answer: f-block

24. The Lanthanoid series is the same as the Actinoid series.

a) True

b) False

Answer: False

25. Write the correct electronic configuration of Neon.

a) 1s²2s²2p⁶

b) 1s²2s²

c) 1s²2p⁶

d) 2s²2p⁶

Answer: 1s²2s²2p⁶

26. Group I elements are called as ________

a) Alkali metals

b) Noble gases

c) Chalcogens

d) Halogens

Answer: Alkali metals

27. The fourth period ends with the element ________

a) Helium

b) Argon

c) Neon

d) Krypton

Answer: Krypton

28. The electrons’ distribution into the atomic orbitals is called as _________

a) Electronic order

b) Electronic distribution

c) Electronic filing

d) Electronic configuration

Answer: Electronic configuration

29. The location of any element in the periodic table is determined by the __________ of the filled last orbital.

a) Spin quantum number

b) Quantum numbers

c) Azimuthal quantum number

d) Magnetic quantum number

Answer: Quantum numbers

30. How many electrons are there in the L-shell of Boron?

a) 3

b) 2

c) 1

d) 4

Answer: 3

31. What happens to the non-metallic nature as we move from left to right in groups?

a) Increases

b) Decreases

c) Remains constant

d) Irregular

Answer: Increases

32. The outer shell electronic configuration of transition block elements is given by ________

a) (n-1)d^1-10ns²

b) (n-1)d^1-10(n-1)s^0-2

c) (n-1)d^1-10ns^0-2

d) nd^1-10ns^0-2

Answer: (n-1)d^1-10ns^0-2

33. Which of the following is not true about transuranium elements?

a) Atomic number > 92

b) Elements after Uranium

c) Decay radioactively as they are unstable

d) Example is Thorium

Answer: Example is Thorium

34. Chalcogens are the elements of Group ___________

a) 18

b) 16

c) 12

d) 2

Answer: 16

35. Which of the following is not a Metalloid?

a) Germanium

b) Silicon

c) Aluminum

d) Tellurium

Answer: Aluminum

36. Metals consist of ______% of the elements known.

a) 78

b) 32

c) 22

d) 68

Answer: 78

37. Name the element that belongs to s-block but is placed in the p-block.

a) Hydrogen

b) Helium

c) Argon

d) Aluminum

Answer: Helium

38. __________ has both the characteristics of Alkali metals and halogens.

a) Helium

b) Chlorine

c) Sodium

d) Hydrogen

Answer: Hydrogen

39. What is the oxidation state of Mn in KMnO4?

a) 5

b) 6

c) 7

d) 4

Answer: 7

40. The relationship between Li, Mg and Be, Al is called the __________ relationship.

a) Diagonal

b) Periodic

c) Group

d) Triangle

Answer: Diagonal

41. N2O is a _________

a) Tear gas

b) Laughing gas

c) Acid

d) Base

Answer: Acid

42. Which of the following is superoxide?

a) K2O

b) Na2O

c) MgO

d) KO2

Answer: KO2

43. What can be tested using a litmus paper?

a) Acidic nature only

b) Basic nature only

c) Both acidic nature and basic nature

d) Nothing

Answer: Both acidic nature and basic nature

44. Atomic radii ____________ along the periods.

a) Increases

b) Decreases

c) Remains constant

d) Irregular

Answer: Decreases

45. O^2-, F^–, Na⁺ and Mg²⁺ are called as

a) Isoelectronic species

b) Isoneutral species

c) Isotopes

d) Isobars

Answer: Isoelectronic species

46. X_(g) → X⁺_(g) + e^–. What does this chemical reaction need to occur?

a) Catalyst

b) Electron affinity

c) Electropositivity

d) Ionization energy

Answer: Ionization energy

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