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. Modern periodic table has been divided in __________ block.

Question 3

3. Mark the correct statement

Answer

Cl⁺ (ions are equal in size)

Answer

Na⁺ is smaller than Na atom

Answer

Cl⁺ is smaller than Cl atom

Answer

Na⁺ is larger than Na atom

Question 4

4. Californium is the member of

Answer

Alkaline earth metals

Answer

Alkali metals

Answer

Actinide series

Answer

Lanthanide series

Question 5

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

Answer

Both form ionic compounds

Answer

Both are electropositive

Answer

Similar outer most shell electronic configuration

Question 6

6. The electron affinity values (in kJ mol¯¹) of three halogens X, Y and Z are respectively – 349, -333 and -325. Then X, Y and Z respectively are:

Answer

Br, Cl and F

Answer

Cl, Br and F

Answer

F, Cl and Br

Answer

Cl, F and Br

Question 7

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

Question 8

8. White enamel of our teeth is

Answer

Ca₃ (PO4)₂

Question 9

9. Chemically the most similar pair of elements is

Question 10

10. The number of elements in fourth period of periodic table is

Question 11

11. Oxidation state of an atom represent

Answer

Number of electrons gained

Answer

Number of electrons lost

Answer

Its vacancies

Answer

Apparent charge I compound

Question 12

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

Answer

Mg < Na < Rb < K

Answer

Mg < K < Na < Rb

Answer

Na < K < Rb < Mg

Answer

Mg < Na < K < Rb

Question 13

13. The attraction that an atom exerts on a pair of electrons that are being shared with another atom for forming covalent bond is referred to as its

Answer

Electron affinity

Answer

Ionization energy

Answer

Electronegativity

Question 14

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

Answer

Rare earths

Answer

Alkaline earths

Answer

Inert gases

Question 15

15. Which of the following has highest electropositive character?

Question 16

16. Metallic characters of alkali metals

Answer

Increase down the group

Answer

No regular trend

Answer

Remain same

Answer

Decrease down the group

Question 17

17. Which one is the strongest reducing agent?

Question 18

18. Oxidation state of an atomic represent

Answer

No of e lost

Answer

No of e gained

Answer

No of e gained or/lost

Question 19

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

Question 20

20. The highly electronegativity atom is

Question 21

21. Which statement is correct?

Answer

Hydrogen resembles in properties with IIA, IVA and VIA elements

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 IA, IVA and VIIA elements

Question 22

22. Which one has least ionization Potential?

Question 23

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

Answer

Neutron/proton ration

Answer

Ionization potential

Answer

Bonding behavior

Answer

Electronegativity

Question 24

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

Question 25

25. Which of the following groups of period table has entirely metals?

Question 26

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

Question 27

27. Elements with similar chemical properties appear in 1 the

Answer

p block elements

Answer

Right upper corner

Answer

Same family

Answer

Same period

Question 28

28. 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 29

29. Which of the following ion is stable in aqueous solution?

Answer

All are stable

Question 30

30. Which of these Period 3 elements have highest electronegativity?

Question 31

31. Which one is more acidic?

Question 32

32. Which discovery caused a revision in periodic law as predicted by Mendeleev?

Answer

Atomic number by Moseley

Answer

Henry Becquerel’s natural radioactivity

Answer

Location of nucleus by Rutherford

Answer

x-rays by Roentgen

Question 33

33. Mark the Dobereiner triad

Answer

Zn, Cr, Na

Question 34

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

Answer

f – block elements

Answer

s – block elements

Answer

p – block elements

Answer

d – block elements

Question 35

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

Question 36

36. Elements in the same vertical group of the periodic table have same

Answer

Atomic volume

Answer

Atomic number

Answer

Number of valence electrons

Answer

Atomic mass

Question 37

37. Elements whose outer electronic configuration vary from ns²np¹ to ns¹np⁶ constitute

Answer

d – block elements

Answer

s – block elements

Answer

p – block elements

Answer

f – block elements

Question 38

38. The atomic radii decreases by increasing atomic number in

Answer

Alkali metal

Answer

Elements from Li to Ne

Answer

Alkaline earth metal

Question 39

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

Answer

Physical properties

Answer

Chemical properties

Answer

Properties of their compounds

Question 40

40. Mark the correct statement

Answer

The ionization energy of calcium is lower than that of barium

Answer

The ionization energy of calcium is lower than that of strontium

Answer

The ionization energy of calcium is higher than that of magnesium

Answer

The ionization energy of calcium is than that of beryllium

Question 41

41. 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

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

Answer

Oxygen has high electron affinity

Answer

O– ion has comparatively larger size oxygen atom

Answer

Oxygen is more electronegative

Question 42

42. The valency of noble gases, in general, is

Question 43

43. Which of the following pairs are chemically dissimilar?

Question 44

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

Answer

Alkali metals

Answer

Noble gases

Answer

Inert metals

Question 45

45. The attempt of classification of elements by plotting the atomic weight of elements against their volumes was made

Answer

Lother Meyer

Answer

Dobereiner

Question 46

46. The electronegativity of Sodium is

Question 47

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

Answer

Rare earth metals

Answer

Alkali metals

Answer

Alkaline earth metals

Answer

Inert gases

Question 48

48. The longest period in the modern periodic table is

Answer

2nd and 3rd both

Question 49

49. Which of the following elements is most electronegative?

Question 50

50. Which of the following possess maximum hydration power?

Question 51

51. 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 52

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

Question 53

53. Which of the p-block elements are not representative elements?

Answer

Alkali metals (I-A)

Answer

Group-18 elements (VIII-A)

Answer

Group-14 elements (IV-A)

Answer

Halogens (VII-A)

Question 54

54. Elements were classified into groups of three called as trades by

Answer

Dobereiner

Answer

Lother Meyer

Answer

Rutherford

Question 55

55. Noble gases are named so because they are

Answer

Zero group element

Answer

Having completely filled valence shell

Question 56

56. Which of the following has greatest tendency lose electron?

Question 57

57. The atoms of same element having same atomic number bit different mass number are called

Question 58

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

Answer

Endothermic

Answer

Exothermic

Answer

Data is insufficient

Question 59

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

Answer

Elements with atomic number 17 and 53

Answer

Elements with atomic number 11 and 33

Answer

Elements with atomic numbers 20 and 40

Answer

Elements with atomic number 17 and 38

Question 60

60. Mark the elements that belong to same period:

Answer

Cr, In, Pb

Answer

Ca, Cr, Zn

Question 61

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

Answer

F C O Cl Br

Answer

C O F Cl Br

Answer

F Cl Br O C

Answer

F O C Cl Br

Question 62

62. The electronegativity of Si is

Question 63

63. An element having low value of ionization energy and low value of electron affinity is likely to belong to

Answer

Group VII A

Answer

Group VIII

Question 64

64. Magnesium keeps on burning in

Answer

N₂ as well as Co₂

Answer 125

Lanthanides

Answer 126

Rare earth metals

Answer 127

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

Answer 128

Melting points of halogens decrease down the group

Answer 129

Melting points of halogens remains the same throughout the group

Answer 130

Melting points of halogens increases down the group

Answer 131

Highest IE

Answer 132

Smallest size

Answer 133

Highest electronegativity

Answer 134

Alkali metal

Answer 135

Elements from Li to Ne

Answer 136

Alkaline earth metal

Answer 137

Charge on its ions

Answer 138

The number of isotopes it has

Answer 139

Acidic or basic nature of oxides

Answer 140

The formula of its oxides

Answer 141

Group VI-A

Answer 142

Group II-A

Answer 143

Group IV-A

Answer 144

Group VII-A

Answer 145

Atomic masses

Answer 146

Atomic numbers

Answer 147

3rd period

Answer 148

5th period

Answer 149

4th period

Answer 150

2nd period

Answer 151

Similar physical state

Answer 152

Same number of electrons in the valence shell

Answer 153

Homovalent (show same valency)

Answer 154

Remarkable reducing properties

Answer 155

7 horizontal and 18 vertical series

Answer 156

8 horizontal and 7 vertical series

Answer 157

8 horizontal and 18 vertical series

Answer 158

7 horizontal and 7 vertical series

Answer 159

None of these

Answer 160

Normal elements

Answer 161

Transition elements

Answer 162

Metallic elements

Answer 163

Atomic volume

Answer 164

m.P and B.P

Answer 165

Ionization energy

Answer 166

Atomic radii

Answer 167

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

Answer 168

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

Answer 169

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

Answer 170

All above statements are correct

Answer 171

Atomic number

Answer 172

Valence electrons

Answer 173

Atomic mass

Answer 174

Rare earth metals

Answer 175

Lanthanides

Answer 176

MP of elements

Answer 177

BP of elements

Answer 178

Ionization energy of elements

Answer 179

Coordination number of icons

Answer 180

All of the above

Answer 181

Amphoteric

Answer 182

Cu, Hg, Au

Answer 183

Cu, Ag, Au

Answer 184

Cu, Fe, Au

Answer 185

Ag, Au, Hg

Answer 186

Atom will lose electron easily

Answer 187

Atom may form di-positive ion

Answer 188

The reason is unknown

Answer 189

Atom will gain electron easily

Answer 190

Sb < As < S < P < Cl

Answer 191

Sb < As < Cl < S < P

Answer 192

As < Cl < P < S < Sb

Answer 193

Cl < Sb < P < As < S

Answer 194

Both b & c

Answer 195

Similar electronic configuration

Answer 196

Both are not found in free state

Answer 197

Both are electropositive

Answer 198

Cannot be predicted

Answer 199

Remains constant

Answer 200

All halogens are present in the same period

Answer 201

All the noble gases are present in the same period

Answer 202

All the alkali metals are present in the same period

Answer 203

All lanthanides are present in the same group

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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Chemistry Periodic Classification Of Elements & Periodicity Online Test

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Important Periodic Classification Of Elements & Periodicity Question and Answer

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