Chemistry Periodic Classification Of Elements & Periodicity Online Test

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Question 1

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

Question 2

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

Question 3

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

Answer

F Cl Br O C

Answer

C O F Cl Br

Answer

F C O Cl Br

Answer

F O C Cl Br

Question 4

4. Higher value of electron affinity means

Answer

Atom will lose electron easily

Answer

Atom will gain electron easily

Answer

Atom may form di-positive ion

Answer

The reason is unknown

Question 5

5. Mark the correct statement

Answer

All halogens are present in the same period

Answer

All the noble gases are present in the same period

Answer

All lanthanides are present in the same group

Answer

All the alkali metals are present in the same period

Question 6

6. The atomic radii decreases by increasing atomic number in

Answer

Alkali metal

Answer

Elements from Li to Ne

Answer

Alkaline earth metal

Question 7

7. The element with atomic number 14 belongs to

Answer

5th period

Answer

2nd period

Answer

4th period

Answer

3rd period

Question 8

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

Question 9

9. Which one has least ionization Potential?

Question 10

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

Answer

Neutron/proton ration

Answer

Ionization potential

Answer

Electronegativity

Answer

Bonding behavior

Question 11

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

Question 12

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

Question 13

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

Answer

d – block elements

Answer

s – block elements

Answer

p – block elements

Answer

f – block elements

Question 14

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

Question 15

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

Question 16

16. Magnesium keeps on burning in

Answer

N₂ as well as Co₂

Question 17

17. Mark the correct statement

Answer

Na⁺ is smaller than Na atom

Answer

Na⁺ is larger than Na atom

Answer

Cl⁺ is smaller than Cl atom

Answer

Cl⁺ (ions are equal in size)

Question 18

18. Elements with similar chemical properties appear in 1 the

Answer

Same period

Answer

p block elements

Answer

Right upper corner

Answer

Same family

Question 19

19. Which of the following has highest electropositive character?

Question 20

20. Which of the following possess maximum hydration power?

Question 21

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

Answer

All are stable

Question 22

22. 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 23

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

Answer

Rutherford

Answer

Dobereiner

Answer

Lother Meyer

Question 24

24. Which one is the strongest reducing agent?

Question 25

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

Answer

Chemical properties

Answer

Physical properties

Answer

Properties of their compounds

Question 26

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

Question 27

27. 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 28

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

Answer

Similar outer most shell electronic configuration

Answer

Both are electropositive

Answer

Both form ionic compounds

Question 29

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

Question 30

30. 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 31

31. The electronegativity of Sodium is

Question 32

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

Answer

Cu, Hg, Au

Answer

Cu, Fe, Au

Answer

Ag, Au, Hg

Answer

Cu, Ag, Au

Question 33

33. Metallic characters of alkali metals

Answer

Increase down the group

Answer

Decrease down the group

Answer

No regular trend

Answer

Remain same

Question 34

34. Which of the following elements is most electronegative?

Question 35

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

Answer

As < Cl < P < S < Sb

Answer

Sb < As < Cl < S < P

Answer

Sb < As < S < P < Cl

Answer

Cl < Sb < P < As < S

Question 36

36. 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 37

37. Which of the pair of metalloids?

Question 38

38. Mark the correct statement

Answer

Melting points of halogens decrease down the group

Answer

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

Answer

Melting points of halogens remains the same throughout the group

Answer

Melting points of halogens increases down the group

Question 39

39. The longest period in the modern periodic table is

Answer

2nd and 3rd both

Question 40

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

Answer

Atomic radii

Answer

Atomic volume

Answer

Melting & boiling points

Answer

Ionization energy

Question 41

41. Alkali metals in each period have

Answer

Smallest size

Answer

Highest electronegativity

Answer

Highest IE

Question 42

42. 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

The number of isotopes it has

Answer

Acidic or basic nature of oxides

Answer

Charge on its ions

Question 43

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

Question 44

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

Answer

Elements with atomic number 17 and 38

Answer

Elements with atomic number 11 and 33

Answer

Elements with atomic number 17 and 53

Answer

Elements with atomic numbers 20 and 40

Question 45

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

Question 46

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

Answer

Inert gases

Answer

Alkaline earth metals

Answer

Alkali metals

Answer

Rare earth metals

Question 47

47. The highly electronegativity atom is

Question 48

48. Which one is more acidic?

Question 49

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

Question 50

50. 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

All above statements are correct

Answer

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

Question 51

51. Which of the following represents element s in order of increasing atomic size?

Question 52

52. Seventh period contains ____________ normal elements

Question 53

53. 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 54

54. Which has largest first ionization energy?

Question 55

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

Question 56

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

Question 57

57. Non-metals usually form ________ oxides.

Answer

All of the above

Answer

Amphoteric

Question 58

58. Metals form halides which are

Question 59

59. 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, F and Br

Answer

F, Cl and Br

Answer

Br, Cl and F

Answer

Cl, Br and F

Question 60

60. Mark the correct statement

Answer

The ionization energy of calcium is lower than that of barium

Answer

The ionization energy of calcium is higher than that of magnesium

Answer

The ionization energy of calcium is than that of beryllium

Answer

The ionization energy of calcium is lower than that of strontium

Question 61

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

Answer

Halogens (VII-A)

Answer

Group-14 elements (IV-A)

Answer

Alkali metals (I-A)

Answer

Group-18 elements (VIII-A)

Question 62

62. The periodic table consists of

Answer

8 horizontal and 18 vertical series

Answer

7 horizontal and 7 vertical series

Answer

7 horizontal and 18 vertical series

Answer

8 horizontal and 7 vertical series

Question 63

63. The elements which behave as metalloid is:

Question 64

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

Answer 121

Metallic elements

Answer 122

None of these

Answer 123

Transition elements

Answer 124

Normal elements

Answer 125

No of e lost

Answer 126

No of e gained or/lost

Answer 127

No of e gained

Answer 128

Alkaline earths

Answer 129

Rare earths

Answer 130

Inert gases

Answer 131

Zn, Cr, Na

Answer 132

Both b & c

Answer 133

Both are not found in free state

Answer 134

Both are electropositive

Answer 135

Similar electronic configuration

Answer 136

Rare earth metals

Answer 137

Lanthanides

Answer 138

Atomic volume

Answer 139

m.P and B.P

Answer 140

Atomic radii

Answer 141

Ionization energy

Answer 142

Zero group element

Answer 143

Having completely filled valence shell

Answer 144

Alkaline earth metal

Answer 145

Elements from Li to Ne

Answer 146

Alkali metal

Answer 147

Remarkable reducing properties

Answer 148

Homovalent (show same valency)

Answer 149

Similar physical state

Answer 150

Same number of electrons in the valence shell

Answer 151

Atomic masses

Answer 152

Atomic numbers

Answer 153

Atomic number by Moseley

Answer 154

x-rays by Roentgen

Answer 155

Henry Becquerel’s natural radioactivity

Answer 156

Location of nucleus by Rutherford

Answer 157

Ionization energy of elements

Answer 158

Coordination number of icons

Answer 159

MP of elements

Answer 160

BP of elements

Answer 161

Dobereiner

Answer 162

Lother Meyer

Answer 163

Atomic mass

Answer 164

Atomic number

Answer 165

Number of valence electrons

Answer 166

Atomic volume

Answer 167

Cr, In, Pb

Answer 168

Ca, Cr, Zn

Answer 169

Endothermic

Answer 170

Data is insufficient

Answer 171

Exothermic

Answer 172

Group IV-A

Answer 173

Group II-A

Answer 174

Group VI-A

Answer 175

Group VII-A

Answer 176

Ca₃ (PO4)₂

Answer 177

Mg < K < Na < Rb

Answer 178

Mg < Na < K < Rb

Answer 179

Na < K < Rb < Mg

Answer 180

Mg < Na < Rb < K

Answer 181

Rare earth metals

Answer 182

Lanthanides

Answer 183

Lanthanide series

Answer 184

Alkali metals

Answer 185

Actinide series

Answer 186

Alkaline earth metals

Answer 187

Both the nuclear charge and the shielding constant

Answer 188

The atomic number

Answer 189

The shielding constant

Answer 190

The charge on the nucleus

Answer 191

Cannot be predicted

Answer 192

Remains constant

Answer 193

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

Answer 194

O– ion has comparatively larger size oxygen atom

Answer 195

Oxygen is more electronegative

Answer 196

Oxygen has high electron affinity

Answer 197

Hydrogen resembles in properties with IA, IVA and VIIA elements

Answer 198

Hydrogen resembles in properties with IIA, IVA and VIA elements

Answer 199

Hydrogen resembles in properties with IIA, IIIA and VIIIA elements

Answer 200

Hydrogen resembles in properties with IIIA, IVA and VA elements

Answer 201

Atomic number

Answer 202

Atomic mass

Answer 203

Valence electrons

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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