Chemistry Periodic Classification Of Elements & Periodicity Online Test

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Question 1

1. Inner transition elements are called

Answer

Rare earth metals

Answer

Lanthanides

Question 2

2. Mark the correct statement

Answer

Cl⁺ (ions are equal in size)

Answer

Cl⁺ is smaller than Cl atom

Answer

Na⁺ is larger than Na atom

Answer

Na⁺ is smaller than Na atom

Question 3

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

Question 4

4. Which one has least ionization Potential?

Question 5

5. Mark the correct statement

Answer

The ionization energy of calcium is than that of beryllium

Answer

The ionization energy of calcium is higher than that of magnesium

Answer

The ionization energy of calcium is lower than that of barium

Answer

The ionization energy of calcium is lower than that of strontium

Question 6

6. The atomic radii decrease by increasing atomic number in

Answer

Elements from Li to Ne

Answer

Alkali metal

Answer

Alkaline earth metal

Question 7

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

Question 8

8. White enamel of our teeth is

Answer

Ca₃ (PO4)₂

Question 9

9. 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 10

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

Question 11

11. Alkali metals in each period have

Answer

Highest IE

Answer

Highest electronegativity

Answer

Smallest size

Question 12

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

Answer

Endothermic

Answer

Exothermic

Answer

Data is insufficient

Question 13

13. Which of the following has highest electropositive character?

Question 14

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

Answer

Sb < As < S < P < Cl

Answer

Sb < As < Cl < S < P

Answer

Cl < Sb < P < As < S

Answer

As < Cl < P < S < Sb

Question 15

15. Which of the following pairs are chemically dissimilar?

Question 16

16. 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 < Na < K < Rb

Answer

Mg < K < Na < Rb

Question 17

17. Which has largest first ionization energy?

Question 18

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

Question 19

19. The electronegativity of Sodium is

Question 20

20. The element with highest first ionization energy is

Question 21

21. 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 22

22. Hydrogen resembles with carbon because of having

Answer

Same number of electrons in the valence shell

Answer

Similar physical state

Answer

Homovalent (show same valency)

Answer

Remarkable reducing properties

Question 23

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

Answer

F O C Cl Br

Answer

F Cl Br O C

Answer

F C O Cl Br

Answer

C O F Cl Br

Question 24

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

Answer

Ag, Au, Hg

Answer

Cu, Fe, Au

Answer

Cu, Hg, Au

Answer

Cu, Ag, Au

Question 25

25. Metals form halides which are

Question 26

26. Elements with similar chemical properties appear in 1 the

Answer

Right upper corner

Answer

p block elements

Answer

Same family

Answer

Same period

Question 27

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

Question 28

28. Which one is not an ionic hydride?

Question 29

29. 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 30

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

Answer

Similar electronic configuration

Answer

Both are not found in free state

Answer

Both are electropositive

Question 31

31. Oxidation state of an atom represent

Answer

Its vacancies

Answer

Apparent charge I compound

Answer

Number of electrons gained

Answer

Number of electrons lost

Question 32

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

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

All above statements are correct

Answer

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

Question 33

33. The periodic table consists of

Answer

7 horizontal and 7 vertical series

Answer

8 horizontal and 7 vertical series

Answer

7 horizontal and 18 vertical series

Answer

8 horizontal and 18 vertical series

Question 34

34. Mark the elements that belong to same period:

Answer

Cr, In, Pb

Answer

Ca, Cr, Zn

Question 35

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

Answer

Coordination number of icons

Answer

MP of elements

Answer

Ionization energy of elements

Answer

BP of elements

Question 36

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

Question 37

37. Californium is the member of

Answer

Actinide series

Answer

Alkali metals

Answer

Alkaline earth metals

Answer

Lanthanide series

Question 38

38. Which one is more acidic?

Question 39

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

Question 40

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

Answer

Atomic masses

Answer

Atomic numbers

Question 41

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

Question 42

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

Answer

Group IV-A

Answer

Group II-A

Answer

Group VI-A

Answer

Group VII-A

Question 43

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

Question 44

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

Question 45

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

Answer

s – block elements

Answer

f – block elements

Answer

p – block elements

Answer

d – block elements

Question 46

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

Answer

Atomic number by Moseley

Answer

Location of nucleus by Rutherford

Answer

x-rays by Roentgen

Answer

Henry Becquerel’s natural radioactivity

Question 47

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

Question 48

48. 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

Electronegativity

Answer

Electron affinity

Question 49

49. Seventh period contains ____________ normal elements

Question 50

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

Answer

Both form ionic compounds

Answer

Similar outer most shell electronic configuration

Answer

Both are electropositive

Question 51

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

Question 52

52. The element with atomic number 14 belongs to

Answer

2nd period

Answer

3rd period

Answer

5th period

Answer

4th period

Question 53

53. Magnesium keeps on burning in

Answer

N₂ as well as Co₂

Question 54

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

Answer

Atomic radii

Answer

Ionization energy

Answer

m.P and B.P

Answer

Atomic volume

Question 55

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

Question 56

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

Answer

p – block elements

Answer

d – block elements

Answer

f – block elements

Answer

s – block elements

Question 57

57. 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

Answer

F, Cl and Br

Answer

Cl, F and Br

Answer

Br, Cl and F

Question 58

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

Question 59

59. The elements which behave as metalloid is:

Question 60

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

Question 61

61. 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 62

62. Which of the pair of metalloids?

Question 63

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

Question 64

64. Which one is the strongest reducing agent?

Answer 120

Atomic volume

Answer 121

Atomic radii

Answer 122

Melting & boiling points

Answer 123

Ionization energy

Answer 124

Elements with atomic number 17 and 53

Answer 125

Elements with atomic numbers 20 and 40

Answer 126

Elements with atomic number 11 and 33

Answer 127

Elements with atomic number 17 and 38

Answer 128

Rare earths

Answer 129

Alkaline earths

Answer 130

Inert gases

Answer 131

Melting points of halogens remains the same throughout the group

Answer 132

Melting points of halogens increases down the group

Answer 133

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

Answer 134

Melting points of halogens decrease down the group

Answer 135

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

Answer 136

Oxygen is more electronegative

Answer 137

Oxygen has high electron affinity

Answer 138

O– ion has comparatively larger size oxygen atom

Answer 139

All are stable

Answer 140

Amphoteric

Answer 141

All of the above

Answer 142

No of e gained

Answer 143

No of e lost

Answer 144

No of e gained or/lost

Answer 145

Both b & c

Answer 146

Atomic mass

Answer 147

Valence electrons

Answer 148

Atomic number

Answer 149

Zero group element

Answer 150

Having completely filled valence shell

Answer 151

Lanthanides

Answer 152

Rare earth metals

Answer 153

None of these

Answer 154

Metallic elements

Answer 155

Normal elements

Answer 156

Transition elements

Answer 157

Atomic mass

Answer 158

Number of valence electrons

Answer 159

Atomic number

Answer 160

Atomic volume

Answer 161

Atom will lose electron easily

Answer 162

Atom will gain electron easily

Answer 163

The reason is unknown

Answer 164

Atom may form di-positive ion

Answer 165

2nd and 3rd both

Answer 166

Neutron/proton ration

Answer 167

Ionization potential

Answer 168

Bonding behavior

Answer 169

Electronegativity

Answer 170

Alkaline earth metal

Answer 171

Alkali metal

Answer 172

Elements from Li to Ne

Answer 173

The number of isotopes it has

Answer 174

The formula of its oxides

Answer 175

Acidic or basic nature of oxides

Answer 176

Charge on its ions

Answer 177

All the alkali metals are present in the same period

Answer 178

All lanthanides are present in the same group

Answer 179

All the noble gases are present in the same period

Answer 180

All halogens are present in the same period

Answer 181

Physical properties

Answer 182

Properties of their compounds

Answer 183

Chemical properties

Answer 184

Remains constant

Answer 185

Cannot be predicted

Answer 186

Group-18 elements (VIII-A)

Answer 187

Group-14 elements (IV-A)

Answer 188

Halogens (VII-A)

Answer 189

Alkali metals (I-A)

Answer 190

No regular trend

Answer 191

Increase down the group

Answer 192

Remain same

Answer 193

Decrease down the group

Answer 194

Zn, Cr, Na

Answer 195

Both the nuclear charge and the shielding constant

Answer 196

The atomic number

Answer 197

The shielding constant

Answer 198

The charge on the nucleus

Answer 199

Lother Meyer

Answer 200

Dobereiner

Answer 201

Rutherford

Answer 202

Dobereiner

Answer 203

Lother Meyer

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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