Chemistry Periodic Classification Of Elements & Periodicity Online Test

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Question 1

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

Question 2

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

Answer

Atomic number

Answer

Valence electrons

Answer

Atomic mass

Question 3

3. Higher value of electron affinity means

Answer

Atom will gain electron easily

Answer

Atom may form di-positive ion

Answer

Atom will lose electron easily

Answer

The reason is unknown

Question 4

4. Oxidation state of an atom represent

Answer

Number of electrons lost

Answer

Number of electrons gained

Answer

Its vacancies

Answer

Apparent charge I compound

Question 5

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

Question 6

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

Answer

Bonding behavior

Answer

Neutron/proton ration

Answer

Ionization potential

Answer

Electronegativity

Question 7

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

Answer

All are stable

Question 8

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

Answer

MP of elements

Answer

Coordination number of icons

Answer

Ionization energy of elements

Answer

BP of elements

Question 9

9. The atomic radii decrease by increasing atomic number in

Answer

Elements from Li to Ne

Answer

Alkaline earth metal

Answer

Alkali metal

Question 10

10. 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 11

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

Answer

Cu, Fe, Au

Answer

Cu, Ag, Au

Answer

Cu, Hg, Au

Answer

Ag, Au, Hg

Question 12

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

Question 13

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

Answer

Group-14 elements (IV-A)

Answer

Group-18 elements (VIII-A)

Answer

Halogens (VII-A)

Answer

Alkali metals (I-A)

Question 14

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

Answer

Atomic number

Answer

Atomic mass

Answer

Atomic volume

Answer

Number of valence electrons

Question 15

15. 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 16

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

Answer

Dobereiner

Answer

Lother Meyer

Question 17

17. Which of the following possess maximum hydration power?

Question 18

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

Question 19

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

Answer

Endothermic

Answer

Data is insufficient

Answer

Exothermic

Question 20

20. Magnesium keeps on burning in

Answer

N₂ as well as Co₂

Question 21

21. 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 has comparatively larger size oxygen atom

Answer

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

Answer

Oxygen is more electronegative

Answer

Oxygen has high electron affinity

Question 22

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

Answer

Elements with atomic number 17 and 38

Answer

Elements with atomic numbers 20 and 40

Answer

Elements with atomic number 11 and 33

Answer

Elements with atomic number 17 and 53

Question 23

23. Mark the correct statement

Answer

The ionization energy of calcium is lower than that of strontium

Answer

The ionization energy of calcium is lower than that of barium

Answer

The ionization energy of calcium is than that of beryllium

Answer

The ionization energy of calcium is higher than that of magnesium

Question 24

24. The periodic table consists of

Answer

7 horizontal and 7 vertical series

Answer

7 horizontal and 18 vertical series

Answer

8 horizontal and 7 vertical series

Answer

8 horizontal and 18 vertical series

Question 25

25. Chemically the most similar pair of elements is

Question 26

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

Answer

Atomic numbers

Answer

Atomic masses

Question 27

27. 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

Ionization energy

Answer

Electron affinity

Answer

Electronegativity

Question 28

28. Mark the correct statement

Answer

Cl⁺ (ions are equal in size)

Answer

Na⁺ is larger than Na atom

Answer

Na⁺ is smaller than Na atom

Answer

Cl⁺ is smaller than Cl atom

Question 29

29. Mark the Dobereiner triad

Answer

Zn, Cr, Na

Question 30

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

Question 31

31. Seventh period contains ____________ normal elements

Question 32

32. The highly electronegativity atom is

Question 33

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

Answer

p – block elements

Answer

f – block elements

Answer

s – block elements

Answer

d – block elements

Question 34

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

Answer

Sb < As < Cl < S < P

Answer

Cl < Sb < P < As < S

Answer

Sb < As < S < P < Cl

Answer

As < Cl < P < S < Sb

Question 35

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

Question 36

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

Question 37

37. The atomic radii decreases by increasing atomic number in

Answer

Elements from Li to Ne

Answer

Alkaline earth metal

Answer

Alkali metal

Question 38

38. Which order of ionization energy is correct?

Answer

Both b & c

Question 39

39. Which of the following pairs are chemically dissimilar?

Question 40

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

Answer

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

Answer

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

Answer

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

Answer

All above statements are correct

Question 41

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

Question 42

42. Hydrogen resembles with carbon because of having

Answer

Homovalent (show same valency)

Answer

Similar physical state

Answer

Same number of electrons in the valence shell

Answer

Remarkable reducing properties

Question 43

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

Question 44

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

Question 45

45. Non-metals usually form ________ oxides.

Answer

All of the above

Answer

Amphoteric

Question 46

46. Inner transition elements are called

Answer

Lanthanides

Answer

Rare earth metals

Question 47

47. The electronegativity of Si is

Question 48

48. Elements with similar chemical properties appear in 1 the

Answer

Right upper corner

Answer

p block elements

Answer

Same family

Answer

Same period

Question 49

49. Mark the correct statement

Answer

All lanthanides are present in the same group

Answer

All halogens are present in the same period

Answer

All the alkali metals are present in the same period

Answer

All the noble gases are present in the same period

Question 50

50. Inner transition elements are called

Answer

Rare earth metals

Answer

Lanthanides

Question 51

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

Question 52

52. The elements which behave as metalloid is:

Question 53

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

Question 54

54. The element with atomic number 14 belongs to

Answer

3rd period

Answer

4th period

Answer

5th period

Answer

2nd period

Question 55

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

Question 56

56. Variable valency is generally exhibited by

Answer

Metallic elements

Answer

Transition elements

Answer

None of these

Answer

Normal elements

Question 57

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

Question 58

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

Answer

Group VIII

Answer

Group VII A

Question 59

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

Question 60

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

Question 61

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

Answer

Both are electropositive

Answer

Both form ionic compounds

Answer

Similar outer most shell electronic configuration

Question 62

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

Question 63

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

Answer

F Cl Br O C

Answer

F O C Cl Br

Answer

F C O Cl Br

Answer

C O F Cl Br

Question 64

64. White enamel of our teeth is

Answer

Ca₃ (PO4)₂

Answer 127

Smallest size

Answer 128

Highest IE

Answer 129

Highest electronegativity

Answer 130

No of e gained or/lost

Answer 131

No of e gained

Answer 132

No of e lost

Answer 133

The charge on the nucleus

Answer 134

The atomic number

Answer 135

Both the nuclear charge and the shielding constant

Answer 136

The shielding constant

Answer 137

Br, Cl and F

Answer 138

Cl, F and Br

Answer 139

Cl, Br and F

Answer 140

F, Cl and Br

Answer 141

Group II-A

Answer 142

Group VI-A

Answer 143

Group IV-A

Answer 144

Group VII-A

Answer 145

Increase down the group

Answer 146

Remain same

Answer 147

Decrease down the group

Answer 148

No regular trend

Answer 149

Hydrogen resembles in properties with IIIA, IVA and VA elements

Answer 150

Hydrogen resembles in properties with IIA, IIIA and VIIIA elements

Answer 151

Hydrogen resembles in properties with IA, IVA and VIIA elements

Answer 152

Hydrogen resembles in properties with IIA, IVA and VIA elements

Answer 153

Atomic volume

Answer 154

Atomic radii

Answer 155

m.P and B.P

Answer 156

Ionization energy

Answer 157

d – block elements

Answer 158

f – block elements

Answer 159

p – block elements

Answer 160

s – block elements

Answer 161

Actinide series

Answer 162

Alkaline earth metals

Answer 163

Lanthanide series

Answer 164

Alkali metals

Answer 165

Acidic or basic nature of oxides

Answer 166

The number of isotopes it has

Answer 167

The formula of its oxides

Answer 168

Charge on its ions

Answer 169

Inert gases

Answer 170

Rare earths

Answer 171

Alkaline earths

Answer 172

2nd and 3rd both

Answer 173

Dobereiner

Answer 174

Rutherford

Answer 175

Lother Meyer

Answer 176

Atomic number by Moseley

Answer 177

Location of nucleus by Rutherford

Answer 178

x-rays by Roentgen

Answer 179

Henry Becquerel’s natural radioactivity

Answer 180

Mg < Na < K < Rb

Answer 181

Mg < K < Na < Rb

Answer 182

Mg < Na < Rb < K

Answer 183

Na < K < Rb < Mg

Answer 184

Cr, In, Pb

Answer 185

Ca, Cr, Zn

Answer 186

Remains constant

Answer 187

Cannot be predicted

Answer 188

Zero group element

Answer 189

Having completely filled valence shell

Answer 190

Melting & boiling points

Answer 191

Atomic volume

Answer 192

Atomic radii

Answer 193

Ionization energy

Answer 194

Alkali metals

Answer 195

Noble gases

Answer 196

Inert metals

Answer 197

Alkali metals

Answer 198

Alkaline earth metals

Answer 199

Inert gases

Answer 200

Rare earth metals

Answer 201

Chemical properties

Answer 202

Properties of their compounds

Answer 203

Physical properties

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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