Chemistry Periodic Classification Of Elements & Periodicity Online Test

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Question 1

1. The element with atomic number 55 belongs to which block of the periodic table

Question 2

2. Which of the following metal requires radiation of highest frequency to cause emission of electrons?

Question 3

3. Alkali metals in each period have

Answer

Highest electronegativity

Answer

Highest IE

Answer

Smallest size

Question 4

4. The element with highest first ionization energy is

Question 5

5. Which order of ionization energy is correct?

Answer

Both b & c

Question 6

6. The element with atomic number 14 belongs to

Answer

4th period

Answer

2nd period

Answer

3rd period

Answer

5th period

Question 7

7. Keeping in view the size of atoms, which order in correct one

Question 8

8. Which of the following pairs are chemically dissimilar?

Question 9

9. Noble gases are named so because they are

Answer

Zero group element

Answer

Having completely filled valence shell

Question 10

10. Which element was not known when Mendeleev proposed his classification?

Question 11

11. Which has largest first ionization energy?

Question 12

12. Which element was not known when Mendeleev proposed his classification?

Question 13

13. The valence shell electronic stricture of an element is ns²np⁵. The element will belong to the group of

Answer

Inert metals

Answer

Alkali metals

Answer

Noble gases

Question 14

14. Best position of hydrogen in the periodic table is above I.A Group which is mainly due to

Answer

Similar outer most shell electronic configuration

Answer

Both form ionic compounds

Answer

Both are electropositive

Question 15

15. The electronegativity of Sodium is

Question 16

16. Metallic characters of alkali metals

Answer

Decrease down the group

Answer

No regular trend

Answer

Increase down the group

Answer

Remain same

Question 17

17. Many of the properties of elements and its compounds can be predicted from the position of element in the periodic table. Which property cannot be predicted?

Answer

Charge on its ions

Answer

Acidic or basic nature of oxides

Answer

The formula of its oxides

Answer

The number of isotopes it has

Question 18

18. IN the light of Mendeleev’s periodic law,. the properties of elements are periodic function of their

Answer

Atomic masses

Answer

Atomic numbers

Question 19

19. Hydrogen resembles with carbon because of having

Answer

Remarkable reducing properties

Answer

Homovalent (show same valency)

Answer

Similar physical state

Answer

Same number of electrons in the valence shell

Question 20

20. Which of the following set consist of all coinage metals?

Answer

Cu, Hg, Au

Answer

Cu, Fe, Au

Answer

Ag, Au, Hg

Answer

Cu, Ag, Au

Question 21

21. The element with atomic number 26 will be found in group

Question 22

22. Elements whose atoms have two outermost shells incomplete are called

Answer

f – block elements

Answer

d – block elements

Answer

p – block elements

Answer

s – block elements

Question 23

23. The correct arrangement of increasing order of atomic radius among Na, K, Mg, Rb is

Answer

Mg < Na < K < Rb

Answer

Na < K < Rb < Mg

Answer

Mg < K < Na < Rb

Answer

Mg < Na < Rb < K

Question 24

24. The periodic table consists of

Answer

7 horizontal and 7 vertical series

Answer

8 horizontal and 18 vertical series

Answer

7 horizontal and 18 vertical series

Answer

8 horizontal and 7 vertical series

Question 25

25. An element has electronic configuration IS2, 2S2, 2P2 with which group does this element belong to

Question 26

26. Higher value of electron affinity means

Answer

The reason is unknown

Answer

Atom may form di-positive ion

Answer

Atom will lose electron easily

Answer

Atom will gain electron easily

Question 27

27. Among the following elements which one has the highest value of first ionization potential?

Question 28

28. Oxidation state of an atom represent

Answer

Apparent charge I compound

Answer

Number of electrons lost

Answer

Number of electrons gained

Answer

Its vacancies

Question 29

29. The property which increases up to group IV-A then decreases onwards

Answer

Atomic volume

Answer

Atomic radii

Answer

Melting & boiling points

Answer

Ionization energy

Question 30

30. Mark the correct statement

Answer

Cl⁺ is smaller than Cl atom

Answer

Cl⁺ (ions are equal in size)

Answer

Na⁺ is larger than Na atom

Answer

Na⁺ is smaller than Na atom

Question 31

31. Magnesium keeps on burning in

Answer

N₂ as well as Co₂

Question 32

32. The elements which behave as metalloid is:

Question 33

33. Oxidation state of an atomic represent

Answer

No of e gained or/lost

Answer

No of e lost

Answer

No of e gained

Question 34

34. The formation of the oxide ion O²¯ (g) requires first a exothermic and then and endothermic step – as shown below:
O(g) +e – → O
∆Ho = – 142 k3 mol – 1
O– (g) + e– →O2 –(g)
∆Ho = + ∆H° = + 844 kJ mol¯¹
This is because:

Answer

Oxygen is more electronegative

Answer

O– ion has comparatively larger size oxygen atom

Answer

Oxygen has high electron affinity

Answer

O– ion will tend to resist the addition of another electron

Question 35

35. Which one is the strongest reducing agent?

Question 36

36. Variable valency is generally exhibited by

Answer

Normal elements

Answer

Transition elements

Answer

None of these

Answer

Metallic elements

Question 37

37. Mark the Dobereiner triad

Answer

Zn, Cr, Na

Question 38

38. The electronegativity of Si is

Question 39

39. Mark the correct statement

Answer

The ionization energy of calcium is higher than that of magnesium

Answer

The ionization energy of calcium is lower than that of strontium

Answer

The ionization energy of calcium is than that of beryllium

Answer

The ionization energy of calcium is lower than that of barium

Question 40

40. Inner transition elements are called

Answer

Lanthanides

Answer

Rare earth metals

Question 41

41. Which statement is correct?

Answer

Hydrogen resembles in properties with IIA, IIIA and VIIIA elements

Answer

Hydrogen resembles in properties with IIIA, IVA and VA elements

Answer

Hydrogen resembles in properties with IIA, IVA and VIA elements

Answer

Hydrogen resembles in properties with IA, IVA and VIIA elements

Question 42

42. Mark the elements that belong to same period:

Answer

Cr, In, Pb

Answer

Ca, Cr, Zn

Question 43

43. Which of the pair of metalloids?

Question 44

44. The atomic radii decreases by increasing atomic number in

Answer

Alkali metal

Answer

Elements from Li to Ne

Answer

Alkaline earth metal

Question 45

45. Mark the correct statement

Answer

Melting points of halogens increases down the group

Answer

Melting points of halogens remains the same throughout the group

Answer

Melting points of halogens decrease down the group

Answer

Melting point of halogens first increase and then decrease down the group

Question 46

46. Which of the following does not reflect the periodicity of elements?

Answer

Bonding behavior

Answer

Electronegativity

Answer

Ionization potential

Answer

Neutron/proton ration

Question 47

47. Of the given alkali metals, the one with smallest size is

Question 48

48. Which among the following elements have lowest value of IE₁?

Question 49

49. Which of the pairs belongs to the same group of periodic table?

Answer

Elements with atomic number 11 and 33

Answer

Elements with atomic number 17 and 53

Answer

Elements with atomic number 17 and 38

Answer

Elements with atomic numbers 20 and 40

Question 50

50. The discovery of which of the following group of elements give below to the Newland’s law of octaves?

Answer

Inert gases

Answer

Alkaline earths

Answer

Rare earths

Question 51

51. Metals form halides which are

Question 52

52. Periodic table provides a basic framework to study elements with respect to their

Answer

Properties of their compounds

Answer

Physical properties

Answer

Chemical properties

Question 53

53. The atomic radii decrease by increasing atomic number in

Answer

Alkali metal

Answer

Elements from Li to Ne

Answer

Alkaline earth metal

Question 54

54. Among O, C, F, Cl, Br, the correct order of increasing radii is

Answer

F O C Cl Br

Answer

F C O Cl Br

Answer

C O F Cl Br

Answer

F Cl Br O C

Question 55

55. Which of the following has highest electropositive character?

Question 56

56. An element has electronic configuration 1s2 2s2 2p2. It belongs to

Answer

Group VI-A

Answer

Group VII-A

Answer

Group II-A

Answer

Group IV-A

Question 57

57. Modern periodic table has been divided in _________ blocks.

Question 58

58. Non-metals usually form ________ oxides.

Answer

All of the above

Answer

Amphoteric

Question 59

59. The defects in the Mendeleev’s Periodic table is/are

Answer

All above statements are correct

Answer

Similar elements like Cu and Zn have been placed in different groups

Answer

K (at, wt.39.1) has been placed after argon (at, wt. 39.9)

Answer

In spite of their different properties, alkali metals and coinage metals have been grouped together

Question 60

60. The 14 elements have been placed in VI period and II group of periodic table. These are called

Answer

Alkaline earth metals

Answer

Alkali metals

Answer

Inert gases

Answer

Rare earth metals

Question 61

61. Addition of 2nd e to uni-negative ion is always

Answer

Endothermic

Answer

Data is insufficient

Answer

Exothermic

Question 62

62. Which of the following statements is most appropriate about effective nuclear charge? It depends upon?

Answer

The shielding constant

Answer

The charge on the nucleus

Answer

The atomic number

Answer

Both the nuclear charge and the shielding constant

Question 63

63. The property which increases up to the middle of the period and then decreases is

Answer

Ionization energy

Answer

Atomic radii

Answer

m.P and B.P

Answer

Atomic volume

Question 64

64. Which set of elements is listed in order of increasing ionization energy?

Answer

Sb < As < Cl < S < P

Answer

Sb < As < S < P < Cl

Answer

Cl < Sb < P < As < S

Answer

As < Cl < P < S < Sb

Answer 145

Group VII A

Answer 146

Group VIII

Answer 147

Atomic mass

Answer 148

Atomic number

Answer 149

Valence electrons

Answer 150

Ca₃ (PO4)₂

Answer 151

2nd and 3rd both

Answer 152

Atomic number by Moseley

Answer 153

Henry Becquerel’s natural radioactivity

Answer 154

Location of nucleus by Rutherford

Answer 155

x-rays by Roentgen

Answer 156

All the noble gases are present in the same period

Answer 157

All the alkali metals are present in the same period

Answer 158

All lanthanides are present in the same group

Answer 159

All halogens are present in the same period

Answer 160

Electronegativity

Answer 161

Ionization energy

Answer 162

Electron affinity

Answer 163

Similar electronic configuration

Answer 164

Both are not found in free state

Answer 165

Both are electropositive

Answer 166

All are stable

Answer 167

Alkaline earth metals

Answer 168

Alkali metals

Answer 169

Lanthanide series

Answer 170

Actinide series

Answer 171

Cl, Br and F

Answer 172

Br, Cl and F

Answer 173

Cl, F and Br

Answer 174

F, Cl and Br

Answer 175

d – block elements

Answer 176

p – block elements

Answer 177

s – block elements

Answer 178

f – block elements

Answer 179

Same family

Answer 180

Same period

Answer 181

p block elements

Answer 182

Right upper corner

Answer 183

Remains constant

Answer 184

Cannot be predicted

Answer 185

Atomic volume

Answer 186

Atomic number

Answer 187

Number of valence electrons

Answer 188

Atomic mass

Answer 189

MP of elements

Answer 190

BP of elements

Answer 191

Ionization energy of elements

Answer 192

Coordination number of icons

Answer 193

Dobereiner

Answer 194

Rutherford

Answer 195

Lother Meyer

Answer 196

Lanthanides

Answer 197

Rare earth metals

Answer 198

Dobereiner

Answer 199

Lother Meyer

Answer 200

Group-14 elements (IV-A)

Answer 201

Alkali metals (I-A)

Answer 202

Halogens (VII-A)

Answer 203

Group-18 elements (VIII-A)

Total Questions:	107
Time Allowed:	60 Minutes
Total Marks:	107
How to Attempt Test:	Please choose the right Option in MCQ-type question.
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Important Periodic Classification Of Elements & Periodicity Question and Answer

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