Chemistry Periodic Classification Of Elements & Periodicity Online Test

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Question 1

1. The periodic table consists of

Answer

7 horizontal and 7 vertical series

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8 horizontal and 7 vertical series

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8 horizontal and 18 vertical series

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7 horizontal and 18 vertical series

Question 2

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

Question 3

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

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Atomic volume

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Atomic mass

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Number of valence electrons

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Atomic number

Question 4

4. Mark the correct statement

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Melting points of halogens decrease down the group

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Melting points of halogens increases down the group

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Melting points of halogens remains the same throughout the group

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

Question 5

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

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

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

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

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All above statements are correct

Question 6

6. Which of the following elements is most electronegative?

Question 7

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

Question 8

8. Which of the following pairs are chemically dissimilar?

Question 9

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

Question 10

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

Answer

The shielding constant

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The atomic number

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Both the nuclear charge and the shielding constant

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The charge on the nucleus

Question 11

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

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Inert metals

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Noble gases

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Alkali metals

Question 12

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

Question 13

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

Question 14

14. Which one is the strongest reducing agent?

Question 15

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

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Similar outer most shell electronic configuration

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Both are electropositive

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Both form ionic compounds

Question 16

16. 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

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Ionization energy

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Electronegativity

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Electron affinity

Question 17

17. Metals form halides which are

Question 18

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

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Ionization energy

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Atomic volume

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Melting & boiling points

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Atomic radii

Question 19

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

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Inert gases

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Alkaline earths

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Rare earths

Question 20

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

Question 21

21. Noble gases are named so because they are

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Zero group element

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Having completely filled valence shell

Question 22

22. 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

The number of isotopes it has

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Charge on its ions

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Acidic or basic nature of oxides

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The formula of its oxides

Question 23

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

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Henry Becquerel’s natural radioactivity

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Atomic number by Moseley

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Location of nucleus by Rutherford

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x-rays by Roentgen

Question 24

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

Question 25

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

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d – block elements

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p – block elements

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f – block elements

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s – block elements

Question 26

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

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d – block elements

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f – block elements

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p – block elements

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s – block elements

Question 27

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

Answer

Sb < As < S < P < Cl

Answer

Cl < Sb < P < As < S

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As < Cl < P < S < Sb

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Sb < As < Cl < S < P

Question 28

28. The alkali metal which is liquid at 15°C is

Question 29

29. Which of the following pair of atomic numbers represents s-block element?

Question 30

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

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Exothermic

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Endothermic

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Data is insufficient

Question 31

31. Alkali metals in each period have

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Highest electronegativity

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Smallest size

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Highest IE

Question 32

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

Question 33

33. 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

Oxygen has high electron affinity

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

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O– ion has comparatively larger size oxygen atom

Question 34

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

Answer

Elements with atomic numbers 20 and 40

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Elements with atomic number 17 and 53

Answer

Elements with atomic number 17 and 38

Answer

Elements with atomic number 11 and 33

Question 35

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

Answer

Cu, Fe, Au

Answer

Cu, Ag, Au

Answer

Ag, Au, Hg

Answer

Cu, Hg, Au

Question 36

36. Among the elements given below, the one with highest electro positivity is

Question 37

37. Which one is more acidic?

Question 38

38. Which of the pair of metalloids?

Question 39

39. Non-metals usually form ________ oxides.

Answer

All of the above

Answer

Amphoteric

Question 40

40. Which statement is correct?

Answer

Hydrogen resembles in properties with IIIA, IVA and VA elements

Answer

Hydrogen resembles in properties with IA, IVA and VIIA elements

Answer

Hydrogen resembles in properties with IIA, IVA and VIA elements

Answer

Hydrogen resembles in properties with IIA, IIIA and VIIIA elements

Question 41

41. The elements which behave as metalloid is:

Question 42

42. The atomic radii decrease by increasing atomic number in

Answer

Alkali metal

Answer

Elements from Li to Ne

Answer

Alkaline earth metal

Question 43

43. Chemically the most similar pair of elements is

Question 44

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

Answer

Rare earth metals

Answer

Alkaline earth metals

Answer

Alkali metals

Answer

Inert gases

Question 45

45. Number of elements present in the fifth period of periodic table is

Question 46

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

Answer

Chemical properties

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Properties of their compounds

Answer

Physical properties

Question 47

47. Which one has least ionization Potential?

Question 48

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

Answer

Ionization potential

Answer

Electronegativity

Answer

Neutron/proton ration

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Bonding behavior

Question 49

49. The highly electronegativity atom is

Question 50

50. Which of these Period 3 element has lowest electronegativity?

Question 51

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

Question 52

52. In modern periodic table all the elements are arranged in ascending order of

Answer

Atomic mass

Answer

Atomic number

Answer

Valence electrons

Question 53

53. The element with highest first ionization energy is

Question 54

54. Seventh period contains ____________ normal elements

Question 55

55. Oxidation state of an atom represent

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Apparent charge I compound

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Its vacancies

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Number of electrons gained

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Number of electrons lost

Question 56

56. Which one is not an ionic hydride?

Question 57

57. Elements with similar chemical properties appear in 1 the

Answer

Same period

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p block elements

Answer

Same family

Answer

Right upper corner

Question 58

58. Mark the Dobereiner triad

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Zn, Cr, Na

Question 59

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

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Atomic masses

Answer

Atomic numbers

Question 60

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

Question 61

61. Mark the correct statement

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The ionization energy of calcium is than that of beryllium

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The ionization energy of calcium is lower than that of strontium

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The ionization energy of calcium is lower than that of barium

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The ionization energy of calcium is higher than that of magnesium

Question 62

62. Which of the following groups may contain a metalloid?

Question 63

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

Question 64

64. 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

Cl, Br and F

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F, Cl and Br

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Br, Cl and F

Answer

Cl, F and Br

Answer 119

Similar physical state

Answer 120

Same number of electrons in the valence shell

Answer 121

Homovalent (show same valency)

Answer 122

Remarkable reducing properties

Answer 123

Mg < Na < K < Rb

Answer 124

Mg < K < Na < Rb

Answer 125

Mg < Na < Rb < K

Answer 126

Na < K < Rb < Mg

Answer 127

Group IV-A

Answer 128

Group II-A

Answer 129

Group VI-A

Answer 130

Group VII-A

Answer 131

Transition elements

Answer 132

None of these

Answer 133

Metallic elements

Answer 134

Normal elements

Answer 135

Na⁺ is larger than Na atom

Answer 136

Na⁺ is smaller than Na atom

Answer 137

Cl⁺ is smaller than Cl atom

Answer 138

Cl⁺ (ions are equal in size)

Answer 139

Ca, Cr, Zn

Answer 140

Cr, In, Pb

Answer 141

5th period

Answer 142

2nd period

Answer 143

3rd period

Answer 144

4th period

Answer 145

Elements from Li to Ne

Answer 146

Alkali metal

Answer 147

Alkaline earth metal

Answer 148

Atomic volume

Answer 149

Atomic radii

Answer 150

Ionization energy

Answer 151

m.P and B.P

Answer 152

Ca₃ (PO4)₂

Answer 153

N₂ as well as Co₂

Answer 154

BP of elements

Answer 155

Coordination number of icons

Answer 156

Ionization energy of elements

Answer 157

MP of elements

Answer 158

No of e lost

Answer 159

No of e gained

Answer 160

No of e gained or/lost

Answer 161

Atom will gain electron easily

Answer 162

Atom may form di-positive ion

Answer 163

The reason is unknown

Answer 164

Atom will lose electron easily

Answer 165

Lanthanides

Answer 166

Rare earth metals

Answer 167

Rare earth metals

Answer 168

Lanthanides

Answer 169

2nd and 3rd both

Answer 170

Rutherford

Answer 171

Lother Meyer

Answer 172

Dobereiner

Answer 173

Group VII A

Answer 174

Group VIII

Answer 175

Both are not found in free state

Answer 176

Both are electropositive

Answer 177

Similar electronic configuration

Answer 178

All halogens are present in the same period

Answer 179

All the noble gases are present in the same period

Answer 180

All lanthanides are present in the same group

Answer 181

All the alkali metals are present in the same period

Answer 182

Remains constant

Answer 183

Cannot be predicted

Answer 184

All are stable

Answer 185

Lanthanide series

Answer 186

Alkali metals

Answer 187

Alkaline earth metals

Answer 188

Actinide series

Answer 189

Alkali metals (I-A)

Answer 190

Group-14 elements (IV-A)

Answer 191

Group-18 elements (VIII-A)

Answer 192

Halogens (VII-A)

Answer 193

Both b & c

Answer 194

Dobereiner

Answer 195

Lother Meyer

Answer 196

F O C Cl Br

Answer 197

C O F Cl Br

Answer 198

F C O Cl Br

Answer 199

F Cl Br O C

Answer 200

No regular trend

Answer 201

Decrease down the group

Answer 202

Increase down the group

Answer 203

Remain same

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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