Chemistry Periodic Classification Of Elements & Periodicity Online Test

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Question 1

1. Metallic characters of alkali metals

Answer

Decrease down the group

Answer

Increase down the group

Answer

Remain same

Answer

No regular trend

Question 2

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

Question 3

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

Answer

F C O Cl Br

Answer

F Cl Br O C

Answer

F O C Cl Br

Answer

C O F Cl Br

Question 4

4. Noble gases are named so because they are

Answer

Having completely filled valence shell

Answer

Zero group element

Question 5

5. Mark the Dobereiner triad

Answer

Zn, Cr, Na

Question 6

6. Variable valency is generally exhibited by

Answer

None of these

Answer

Normal elements

Answer

Metallic elements

Answer

Transition elements

Question 7

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

Answer

Henry Becquerel’s natural radioactivity

Answer

x-rays by Roentgen

Answer

Location of nucleus by Rutherford

Answer

Atomic number by Moseley

Question 8

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

Question 9

9. White enamel of our teeth is

Answer

Ca₃ (PO4)₂

Question 10

10. Higher value of electron affinity means

Answer

The reason is unknown

Answer

Atom will lose electron easily

Answer

Atom will gain electron easily

Answer

Atom may form di-positive ion

Question 11

11. Inner transition elements are called

Answer

Lanthanides

Answer

Rare earth metals

Question 12

12. The element with highest first ionization energy is

Question 13

13. Inner transition elements are called

Answer

Lanthanides

Answer

Rare earth metals

Question 14

14. Which of the following pairs are chemically dissimilar?

Question 15

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

Question 16

16. 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 is more electronegative

Answer

Oxygen has high electron affinity

Answer

O– ion has comparatively larger size oxygen atom

Question 17

17. Mark the elements that belong to same period:

Answer

Ca, Cr, Zn

Answer

Cr, In, Pb

Question 18

18. Hydrogen resembles with carbon because of having

Answer

Remarkable reducing properties

Answer

Same number of electrons in the valence shell

Answer

Similar physical state

Answer

Homovalent (show same valency)

Question 19

19. Which of the following elements is most electronegative?

Question 20

20. The highly electronegativity atom is

Question 21

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

Question 22

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

Answer

The charge on the nucleus

Answer

The atomic number

Answer

The shielding constant

Answer

Both the nuclear charge and the shielding constant

Question 23

23. 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 24

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

Answer

Dobereiner

Answer

Lother Meyer

Question 25

25. The atomic radii decrease by increasing atomic number in

Answer

Alkali metal

Answer

Elements from Li to Ne

Answer

Alkaline earth metal

Question 26

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

Question 27

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

Answer

Ionization energy

Answer

m.P and B.P

Answer

Atomic radii

Answer

Atomic volume

Question 28

28. The electronegativity of Si is

Question 29

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

Question 30

30. Californium is the member of

Answer

Lanthanide series

Answer

Actinide series

Answer

Alkali metals

Answer

Alkaline earth metals

Question 31

31. Which one has least ionization Potential?

Question 32

32. 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

Electronegativity

Answer

Electron affinity

Answer

Ionization energy

Question 33

33. Modern periodic table has been divided in __________ block.

Question 34

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

Question 35

35. The periodic table consists of

Answer

7 horizontal and 7 vertical series

Answer

8 horizontal and 18 vertical series

Answer

8 horizontal and 7 vertical series

Answer

7 horizontal and 18 vertical series

Question 36

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

Answer

Na < K < Rb < Mg

Answer

Mg < Na < Rb < K

Answer

Mg < K < Na < Rb

Answer

Mg < Na < K < Rb

Question 37

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

Question 38

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

Answer

Atomic mass

Answer

Valence electrons

Answer

Atomic number

Question 39

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

Answer

Group-18 elements (VIII-A)

Answer

Group-14 elements (IV-A)

Answer

Alkali metals (I-A)

Answer

Halogens (VII-A)

Question 40

40. 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 41

41. Which one is more acidic?

Question 42

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

Answer

Rutherford

Answer

Dobereiner

Answer

Lother Meyer

Question 43

43. 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 44

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

Answer

Cu, Fe, Au

Answer

Ag, Au, Hg

Answer

Cu, Hg, Au

Answer

Cu, Ag, Au

Question 45

45. 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 formula of its oxides

Answer

Charge on its ions

Answer

Acidic or basic nature of oxides

Answer

The number of isotopes it has

Question 46

46. Which one of the following is not a periodic property?

Answer

MP of elements

Answer

BP of elements

Answer

Coordination number of icons

Answer

Ionization energy of elements

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

Inert gases

Answer

Alkali metals

Answer

Alkaline earth metals

Question 48

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

Question 49

49. Mark the correct statement

Answer

All halogens are present in the same period

Answer

All lanthanides are present in the same group

Answer

All the noble gases are present in the same period

Answer

All the alkali metals are present in the same period

Question 50

50. Magnesium keeps on burning in

Answer

N₂ as well as Co₂

Question 51

51. Which of the following has highest electropositive character?

Question 52

52. Which one is the strongest reducing agent?

Question 53

53. Best position of hydrogen in the periodic table is mainly due to

Answer

Both are electropositive

Answer

Similar electronic configuration

Answer

Both are not found in free state

Question 54

54. Non-metals usually form ________ oxides.

Answer

All of the above

Answer

Amphoteric

Question 55

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

Question 56

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

Question 57

57. Which of the following elements is/are not liquid at 30°C?

Question 58

58. Elements with similar chemical properties appear in 1 the

Answer

Same period

Answer

p block elements

Answer

Right upper corner

Answer

Same family

Question 59

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

Answer

Group II-A

Answer

Group VI-A

Answer

Group IV-A

Answer

Group VII-A

Question 60

60. 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 61

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

Question 62

62. Alkali metals in each period have

Answer

Highest electronegativity

Answer

Smallest size

Answer

Highest IE

Question 63

63. Mark the correct statement

Answer

Na⁺ is smaller than Na atom

Answer

Cl⁺ is smaller than Cl atom

Answer

Cl⁺ (ions are equal in size)

Answer

Na⁺ is larger than Na atom

Question 64

64. Which of the following possess maximum hydration power?

Answer 130

All are stable

Answer 131

Remains constant

Answer 132

Cannot be predicted

Answer 133

Atomic masses

Answer 134

Atomic numbers

Answer 135

Ionization energy

Answer 136

Atomic volume

Answer 137

Atomic radii

Answer 138

Melting & boiling points

Answer 139

Atomic volume

Answer 140

Atomic mass

Answer 141

Number of valence electrons

Answer 142

Atomic number

Answer 143

f – block elements

Answer 144

p – block elements

Answer 145

d – block elements

Answer 146

s – block elements

Answer 147

Exothermic

Answer 148

Endothermic

Answer 149

Data is insufficient

Answer 150

Alkaline earth metal

Answer 151

Elements from Li to Ne

Answer 152

Alkali metal

Answer 153

2nd and 3rd both

Answer 154

Melting points of halogens increases down the group

Answer 155

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

Answer 156

Melting points of halogens decrease down the group

Answer 157

Melting points of halogens remains the same throughout the group

Answer 158

F, Cl and Br

Answer 159

Br, Cl and F

Answer 160

Cl, Br and F

Answer 161

Cl, F and Br

Answer 162

Both b & c

Answer 163

Its vacancies

Answer 164

Number of electrons lost

Answer 165

Apparent charge I compound

Answer 166

Number of electrons gained

Answer 167

s – block elements

Answer 168

d – block elements

Answer 169

f – block elements

Answer 170

p – block elements

Answer 171

Hydrogen resembles in properties with IIA, IVA and VIA elements

Answer 172

Hydrogen resembles in properties with IIIA, IVA and VA elements

Answer 173

Hydrogen resembles in properties with IIA, IIIA and VIIIA elements

Answer 174

Hydrogen resembles in properties with IA, IVA and VIIA elements

Answer 175

Bonding behavior

Answer 176

Ionization potential

Answer 177

Electronegativity

Answer 178

Neutron/proton ration

Answer 179

All above statements are correct

Answer 180

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

Answer 181

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

Answer 182

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

Answer 183

The ionization energy of calcium is lower than that of barium

Answer 184

The ionization energy of calcium is higher than that of magnesium

Answer 185

The ionization energy of calcium is lower than that of strontium

Answer 186

The ionization energy of calcium is than that of beryllium

Answer 187

Both are electropositive

Answer 188

Both form ionic compounds

Answer 189

Similar outer most shell electronic configuration

Answer 190

Sb < As < Cl < S < P

Answer 191

As < Cl < P < S < Sb

Answer 192

Sb < As < S < P < Cl

Answer 193

Cl < Sb < P < As < S

Answer 194

5th period

Answer 195

4th period

Answer 196

3rd period

Answer 197

2nd period

Answer 198

No of e gained

Answer 199

No of e gained or/lost

Answer 200

No of e lost

Answer 201

Alkaline earths

Answer 202

Rare earths

Answer 203

Inert gases

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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