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

Answer

Ionization potential

Answer

Neutron/proton ration

Answer

Bonding behavior

Answer

Electronegativity

Question 3

3. The element with highest first ionization energy is

Question 4

4. 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 5

5. Alkali metals in each period have

Answer

Smallest size

Answer

Highest IE

Answer

Highest electronegativity

Question 6

6. The valence shell electronic stricture of an element is ns²np⁵. The element will belong to the group of

Answer

Alkali metals

Answer

Noble gases

Answer

Inert metals

Question 7

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

Question 8

8. Inner transition elements are called

Answer

Lanthanides

Answer

Rare earth metals

Question 9

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

Answer

Group VI-A

Answer

Group VII-A

Answer

Group II-A

Answer

Group IV-A

Question 10

10. The electronegativity of Sodium is

Question 11

11. Mark the correct statement

Answer

All the alkali metals are present in the same period

Answer

All the noble gases are present in the same period

Answer

All halogens are present in the same period

Answer

All lanthanides are present in the same group

Question 12

12. Mark the correct statement

Answer

Cl⁺ (ions are equal in size)

Answer

Na⁺ is larger than Na atom

Answer

Cl⁺ is smaller than Cl atom

Answer

Na⁺ is smaller than Na atom

Question 13

13. Oxidation state of an atom represent

Answer

Apparent charge I compound

Answer

Number of electrons lost

Answer

Its vacancies

Answer

Number of electrons gained

Question 14

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

Answer

Alkali metals (I-A)

Answer

Halogens (VII-A)

Answer

Group-18 elements (VIII-A)

Answer

Group-14 elements (IV-A)

Question 15

15. 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

Oxygen has high electron affinity

Answer

Oxygen is more electronegative

Answer

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

Question 16

16. Which order of ionization energy is correct?

Answer

Both b & c

Question 17

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

Answer

x-rays by Roentgen

Answer

Location of nucleus by Rutherford

Answer

Henry Becquerel’s natural radioactivity

Answer

Atomic number by Moseley

Question 18

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

Question 19

19. The highly electronegativity atom is

Question 20

20. Chemically the most similar pair of elements is

Question 21

21. Mark the elements that belong to same period:

Answer

Cr, In, Pb

Answer

Ca, Cr, Zn

Question 22

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

Answer

Dobereiner

Answer

Lother Meyer

Answer

Rutherford

Question 23

23. Which one is not an ionic hydride?

Question 24

24. Mark the Dobereiner triad

Answer

Zn, Cr, Na

Question 25

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

Question 26

26. The periodic table consists of

Answer

7 horizontal and 7 vertical series

Answer

8 horizontal and 18 vertical series

Answer

7 horizontal and 18 vertical series

Answer

8 horizontal and 7 vertical series

Question 27

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

Answer

Atomic masses

Answer

Atomic numbers

Question 28

28. Magnesium keeps on burning in

Answer

N₂ as well as Co₂

Question 29

29. 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 30

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

Answer

Atomic volume

Answer

Number of valence electrons

Answer

Atomic mass

Answer

Atomic number

Question 31

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

Answer

Alkaline earth metals

Answer

Rare earth metals

Answer

Alkali metals

Answer

Inert gases

Question 32

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

Answer

Ionization energy

Answer

Atomic volume

Answer

Atomic radii

Answer

Melting & boiling points

Question 33

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

Answer

Ag, Au, Hg

Answer

Cu, Fe, Au

Answer

Cu, Ag, Au

Answer

Cu, Hg, Au

Question 34

34. The atomic radii decrease by increasing atomic number in

Answer

Alkali metal

Answer

Alkaline earth metal

Answer

Elements from Li to Ne

Question 35

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

Answer

All are stable

Question 36

36. 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 formula of its oxides

Answer

The number of isotopes it has

Question 37

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

Question 38

38. Oxidation state of an atomic represent

Answer

No of e lost

Answer

No of e gained

Answer

No of e gained or/lost

Question 39

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

Question 40

40. Higher value of electron affinity means

Answer

Atom will gain electron easily

Answer

Atom may form di-positive ion

Answer

The reason is unknown

Answer

Atom will lose electron easily

Question 41

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

Question 42

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

Answer

s – block elements

Answer

f – block elements

Answer

d – block elements

Answer

p – block elements

Question 43

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

Question 44

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

Answer

Exothermic

Answer

Data is insufficient

Answer

Endothermic

Question 45

45. 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, Br and F

Answer

Cl, F and Br

Answer

F, Cl and Br

Question 46

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

Answer

Lother Meyer

Answer

Dobereiner

Question 47

47. Metallic characters of alkali metals

Answer

No regular trend

Answer

Decrease down the group

Answer

Increase down the group

Answer

Remain same

Question 48

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

Question 49

49. 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 50

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

Question 51

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

Answer

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

Answer

All above statements are correct

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)

Question 52

52. Which of the pair of metalloids?

Question 53

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

Answer

Elements with atomic number 17 and 53

Answer

Elements with atomic number 11 and 33

Answer

Elements with atomic numbers 20 and 40

Answer

Elements with atomic number 17 and 38

Question 54

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

Question 55

55. Which one has least ionization Potential?

Question 56

56. Which has largest first ionization energy?

Question 57

57. 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

Cl < Sb < P < As < S

Answer

Sb < As < S < P < Cl

Question 58

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

Answer

Mg < Na < Rb < K

Answer

Na < K < Rb < Mg

Answer

Mg < Na < K < Rb

Answer

Mg < K < Na < Rb

Question 59

59. Mark the correct statement

Answer

The ionization energy of calcium is than that of beryllium

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 lower than that of strontium

Question 60

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

Question 61

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

Answer

BP of elements

Answer

Coordination number of icons

Answer

Ionization energy of elements

Answer

MP of elements

Question 62

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

Question 63

63. Inner transition elements are called

Answer

Lanthanides

Answer

Rare earth metals

Question 64

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

Answer 140

Electronegativity

Answer 141

Electron affinity

Answer 142

Ionization energy

Answer 143

The shielding constant

Answer 144

The atomic number

Answer 145

Both the nuclear charge and the shielding constant

Answer 146

The charge on the nucleus

Answer 147

Atomic volume

Answer 148

Atomic radii

Answer 149

m.P and B.P

Answer 150

Ionization energy

Answer 151

Atomic mass

Answer 152

Valence electrons

Answer 153

Atomic number

Answer 154

Elements from Li to Ne

Answer 155

Alkali metal

Answer 156

Alkaline earth metal

Answer 157

2nd and 3rd both

Answer 158

Lanthanide series

Answer 159

Alkali metals

Answer 160

Actinide series

Answer 161

Alkaline earth metals

Answer 162

Hydrogen resembles in properties with IIIA, IVA and VA elements

Answer 163

Hydrogen resembles in properties with IA, IVA and VIIA elements

Answer 164

Hydrogen resembles in properties with IIA, IVA and VIA elements

Answer 165

Hydrogen resembles in properties with IIA, IIIA and VIIIA elements

Answer 166

Having completely filled valence shell

Answer 167

Zero group element

Answer 168

F Cl Br O C

Answer 169

F O C Cl Br

Answer 170

C O F Cl Br

Answer 171

F C O Cl Br

Answer 172

2nd period

Answer 173

5th period

Answer 174

3rd period

Answer 175

4th period

Answer 176

Physical properties

Answer 177

Chemical properties

Answer 178

Properties of their compounds

Answer 179

Both are electropositive

Answer 180

Similar outer most shell electronic configuration

Answer 181

Both form ionic compounds

Answer 182

Right upper corner

Answer 183

Same period

Answer 184

p block elements

Answer 185

Same family

Answer 186

Normal elements

Answer 187

Metallic elements

Answer 188

Transition elements

Answer 189

None of these

Answer 190

Melting points of halogens increases down the group

Answer 191

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

Answer 192

Melting points of halogens decrease down the group

Answer 193

Melting points of halogens remains the same throughout the group

Answer 194

Group VII A

Answer 195

Group VIII

Answer 196

All of the above

Answer 197

Amphoteric

Answer 198

s – block elements

Answer 199

p – block elements

Answer 200

d – block elements

Answer 201

f – block elements

Answer 202

Remains constant

Answer 203

Cannot be predicted

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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