Chemistry Periodic Classification Of Elements & Periodicity Online Test

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Question 1

1. White enamel of our teeth is

Answer

Ca₃ (PO4)₂

Question 2

2. 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 3

3. Magnesium keeps on burning in

Answer

N₂ as well as Co₂

Question 4

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

Question 5

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

Question 6

6. The atomic radii decreases by increasing atomic number in

Answer

Alkaline earth metal

Answer

Elements from Li to Ne

Answer

Alkali metal

Question 7

7. Variable valency is generally exhibited by

Answer

Normal elements

Answer

None of these

Answer

Metallic elements

Answer

Transition elements

Question 8

8. 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 has high electron affinity

Answer

Oxygen is more electronegative

Answer

O– ion has comparatively larger size oxygen atom

Question 9

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

Question 10

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

Question 11

11. Which statement is correct?

Answer

Hydrogen resembles in properties with IA, IVA and VIIA elements

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

Question 12

12. Which of the following pairs are chemically dissimilar?

Question 13

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

Question 14

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

Answer

Electronegativity

Answer

Ionization potential

Answer

Bonding behavior

Answer

Neutron/proton ration

Question 15

15. Chemically the most similar pair of elements is

Question 16

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

Question 17

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

Answer

Both are electropositive

Answer

Both are not found in free state

Answer

Similar electronic configuration

Question 18

18. Higher value of electron affinity means

Answer

Atom may form di-positive ion

Answer

The reason is unknown

Answer

Atom will lose electron easily

Answer

Atom will gain electron easily

Question 19

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

Answer

The atomic number

Answer

The shielding constant

Answer

The charge on the nucleus

Answer

Both the nuclear charge and the shielding constant

Question 20

20. Californium is the member of

Answer

Alkali metals

Answer

Actinide series

Answer

Alkaline earth metals

Answer

Lanthanide series

Question 21

21. The electronegativity of Sodium is

Question 22

22. Which one is more acidic?

Question 23

23. Which one has least ionization Potential?

Question 24

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

Question 25

25. 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

Acidic or basic nature of oxides

Answer

Charge on its ions

Answer

The number of isotopes it has

Answer

The formula of its oxides

Question 26

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

Answer

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

Answer

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

Answer

All above statements are correct

Answer

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

Question 27

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

Question 28

28. The highly electronegativity atom is

Question 29

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

Question 30

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

Question 31

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

Answer

Atomic number

Answer

Atomic mass

Answer

Number of valence electrons

Answer

Atomic volume

Question 32

32. Mark the Dobereiner triad

Answer

Zn, Cr, Na

Question 33

33. Mark the correct statement

Answer

Melting points of halogens decrease down the group

Answer

Melting points of halogens increases 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

Question 34

34. The electronegativity of Si is

Question 35

35. Mark the correct statement

Answer

All the noble gases are present in the same period

Answer

All halogens are present in the same period

Answer

All the alkali metals are present in the same period

Answer

All lanthanides are present in the same group

Question 36

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

Answer

Atomic numbers

Answer

Atomic masses

Question 37

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

Question 38

38. The longest period in the modern periodic table is

Answer

2nd and 3rd both

Question 39

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

Answer

Dobereiner

Answer

Lother Meyer

Question 40

40. 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

Br, Cl and F

Answer

Cl, F and Br

Answer

F, Cl and Br

Answer

Cl, Br and F

Question 41

41. Elements with similar chemical properties appear in 1 the

Answer

p block elements

Answer

Right upper corner

Answer

Same family

Answer

Same period

Question 42

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

Question 43

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

Answer

Halogens (VII-A)

Answer

Alkali metals (I-A)

Answer

Group-18 elements (VIII-A)

Answer

Group-14 elements (IV-A)

Question 44

44. Metals form halides which are

Question 45

45. Oxidation state of an atom represent

Answer

Number of electrons gained

Answer

Number of electrons lost

Answer

Its vacancies

Answer

Apparent charge I compound

Question 46

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

Answer

Rare earths

Answer

Alkaline earths

Answer

Inert gases

Question 47

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

Question 48

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

Question 49

49. Which one is not an ionic hydride?

Question 50

50. The element with highest first ionization energy is

Question 51

51. The element with atomic number 14 belongs to

Answer

4th period

Answer

2nd period

Answer

5th period

Answer

3rd period

Question 52

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

Answer

Both are electropositive

Answer

Similar outer most shell electronic configuration

Answer

Both form ionic compounds

Question 53

53. Which of the following elements is most electronegative?

Question 54

54. Hydrogen resembles with carbon because of having

Answer

Homovalent (show same valency)

Answer

Same number of electrons in the valence shell

Answer

Similar physical state

Answer

Remarkable reducing properties

Question 55

55. Seventh period contains ____________ normal elements

Question 56

56. The periodic table consists of

Answer

7 horizontal and 7 vertical series

Answer

7 horizontal and 18 vertical series

Answer

8 horizontal and 18 vertical series

Answer

8 horizontal and 7 vertical series

Question 57

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

Answer

Ionization energy

Answer

Atomic radii

Answer

Atomic volume

Answer

Melting & boiling points

Question 58

58. Metallic characters of alkali metals

Answer

Decrease down the group

Answer

Remain same

Answer

No regular trend

Answer

Increase down the group

Question 59

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

Answer

x-rays by Roentgen

Answer

Location of nucleus by Rutherford

Answer

Atomic number by Moseley

Answer

Henry Becquerel’s natural radioactivity

Question 60

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

Question 61

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

Answer

All are stable

Question 62

62. Alkali metals in each period have

Answer

Highest electronegativity

Answer

Highest IE

Answer

Smallest size

Question 63

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

Question 64

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

Answer

Sb < As < S < P < Cl

Answer

Cl < Sb < P < As < S

Answer

Sb < As < Cl < S < P

Answer

As < Cl < P < S < Sb

Answer 121

Elements with atomic number 17 and 53

Answer 122

Elements with atomic numbers 20 and 40

Answer 123

Elements with atomic number 11 and 33

Answer 124

Elements with atomic number 17 and 38

Answer 125

F C O Cl Br

Answer 126

F O C Cl Br

Answer 127

F Cl Br O C

Answer 128

C O F Cl Br

Answer 129

p – block elements

Answer 130

s – block elements

Answer 131

f – block elements

Answer 132

d – block elements

Answer 133

Atomic mass

Answer 134

Atomic number

Answer 135

Valence electrons

Answer 136

Cu, Fe, Au

Answer 137

Ag, Au, Hg

Answer 138

Cu, Hg, Au

Answer 139

Cu, Ag, Au

Answer 140

Rare earth metals

Answer 141

Lanthanides

Answer 142

Group VIII

Answer 143

Group VII A

Answer 144

Group II-A

Answer 145

Group VI-A

Answer 146

Group IV-A

Answer 147

Group VII-A

Answer 148

Alkaline earth metal

Answer 149

Elements from Li to Ne

Answer 150

Alkali metal

Answer 151

Endothermic

Answer 152

Exothermic

Answer 153

Data is insufficient

Answer 154

Rare earth metals

Answer 155

Lanthanides

Answer 156

Both b & c

Answer 157

Noble gases

Answer 158

Inert metals

Answer 159

Alkali metals

Answer 160

Zero group element

Answer 161

Having completely filled valence shell

Answer 162

BP of elements

Answer 163

Coordination number of icons

Answer 164

Ionization energy of elements

Answer 165

MP of elements

Answer 166

Alkaline earth metals

Answer 167

Alkali metals

Answer 168

Rare earth metals

Answer 169

Inert gases

Answer 170

Na⁺ is smaller than Na atom

Answer 171

Cl⁺ (ions are equal in size)

Answer 172

Cl⁺ is smaller than Cl atom

Answer 173

Na⁺ is larger than Na atom

Answer 174

Ionization energy

Answer 175

Atomic radii

Answer 176

m.P and B.P

Answer 177

Atomic volume

Answer 178

No of e lost

Answer 179

No of e gained or/lost

Answer 180

No of e gained

Answer 181

Cr, In, Pb

Answer 182

Ca, Cr, Zn

Answer 183

Electronegativity

Answer 184

Ionization energy

Answer 185

Electron affinity

Answer 186

Remains constant

Answer 187

Cannot be predicted

Answer 188

All of the above

Answer 189

Amphoteric

Answer 190

Chemical properties

Answer 191

Properties of their compounds

Answer 192

Physical properties

Answer 193

Dobereiner

Answer 194

Rutherford

Answer 195

Lother Meyer

Answer 196

f – block elements

Answer 197

d – block elements

Answer 198

p – block elements

Answer 199

s – block elements

Answer 200

Mg < Na < K < Rb

Answer 201

Mg < K < Na < Rb

Answer 202

Mg < Na < Rb < K

Answer 203

Na < K < Rb < Mg

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

Chemistry Periodic Classification Of Elements & Periodicity Practice Test Online With Explanation

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