Chemistry Periodic Classification Of Elements & Periodicity Online Test

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Question 1

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

Question 2

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

Question 3

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

Question 4

4. Which one is more acidic?

Question 5

5. Non-metals usually form ________ oxides.

Answer

All of the above

Answer

Amphoteric

Question 6

6. 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 7

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

Question 8

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

Answer

x-rays by Roentgen

Answer

Henry Becquerel’s natural radioactivity

Answer

Atomic number by Moseley

Answer

Location of nucleus by Rutherford

Question 9

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

Question 10

10. 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 11

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

Answer

Group IV-A

Answer

Group VI-A

Answer

Group VII-A

Answer

Group II-A

Question 12

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

Question 13

13. The electronegativity of Sodium is

Question 14

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

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. The electronegativity of Si is

Question 17

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

Question 18

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

Question 19

19. The highly electronegativity atom is

Question 20

20. Inner transition elements are called

Answer

Lanthanides

Answer

Rare earth metals

Question 21

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

Answer

Data is insufficient

Answer

Exothermic

Answer

Endothermic

Question 22

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

Answer

Atomic numbers

Answer

Atomic masses

Question 23

23. 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 24

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

Question 25

25. The elements which behave as metalloid is:

Question 26

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

Answer

Rutherford

Answer

Dobereiner

Answer

Lother Meyer

Question 27

27. Metals form halides which are

Question 28

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

Question 29

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

Answer

Atomic mass

Answer

Valence electrons

Answer

Atomic number

Question 30

30. Alkali metals in each period have

Answer

Smallest size

Answer

Highest electronegativity

Answer

Highest IE

Question 31

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

Answer

p – block elements

Answer

s – block elements

Answer

f – block elements

Answer

d – block elements

Question 32

32. Metallic characters of alkali metals

Answer

Increase down the group

Answer

No regular trend

Answer

Remain same

Answer

Decrease down the group

Question 33

33. Mark the correct statement

Answer

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

Answer

Melting points of halogens decrease down the group

Answer

Melting points of halogens increases down the group

Answer

Melting points of halogens remains the same throughout the group

Question 34

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

Question 35

35. Mark the correct statement

Answer

Cl⁺ (ions are equal in size)

Answer

Na⁺ is smaller than Na atom

Answer

Cl⁺ is smaller than Cl atom

Answer

Na⁺ is larger than Na atom

Question 36

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

Question 37

37. 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 38

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

Answer

Coordination number of icons

Answer

Ionization energy of elements

Answer

MP of elements

Answer

BP of elements

Question 39

39. Oxidation state of an atomic represent

Answer

No of e gained

Answer

No of e gained or/lost

Answer

No of e lost

Question 40

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

Answer

All above statements are correct

Answer

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

Answer

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

Answer

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

Question 41

41. 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 42

42. The atomic radii decreases by increasing atomic number in

Answer

Elements from Li to Ne

Answer

Alkali metal

Answer

Alkaline earth metal

Question 43

43. Magnesium keeps on burning in

Answer

N₂ as well as Co₂

Question 44

44. Which of the following elements is most electronegative?

Question 45

45. Which of the following pairs are chemically dissimilar?

Question 46

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

Question 47

47. The element with highest first ionization energy is

Question 48

48. Which of the pair of metalloids?

Question 49

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

Question 50

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

Answer

Cu, Ag, Au

Answer

Cu, Hg, Au

Answer

Cu, Fe, Au

Answer

Ag, Au, Hg

Question 51

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

Question 52

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

Question 53

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

Answer

All are stable

Question 54

54. The periodic table consists of

Answer

8 horizontal and 18 vertical series

Answer

7 horizontal and 7 vertical series

Answer

8 horizontal and 7 vertical series

Answer

7 horizontal and 18 vertical series

Question 55

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

Answer

Both are not found in free state

Answer

Similar electronic configuration

Answer

Both are electropositive

Question 56

56. Elements with similar chemical properties appear in 1 the

Answer

Same period

Answer

p block elements

Answer

Same family

Answer

Right upper corner

Question 57

57. Which of the following possess maximum hydration power?

Question 58

58. Mark the elements that belong to same period:

Answer

Cr, In, Pb

Answer

Ca, Cr, Zn

Question 59

59. 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 number of isotopes it has

Answer

Acidic or basic nature of oxides

Answer

The formula of its oxides

Answer

Charge on its ions

Question 60

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

Answer

Sb < As < S < P < Cl

Answer

As < Cl < P < S < Sb

Answer

Cl < Sb < P < As < S

Answer

Sb < As < Cl < S < P

Question 61

61. White enamel of our teeth is

Answer

Ca₃ (PO4)₂

Question 62

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

Answer

Both form ionic compounds

Answer

Both are electropositive

Answer

Similar outer most shell electronic configuration

Question 63

63. Variable valency is generally exhibited by

Answer

Metallic elements

Answer

None of these

Answer

Normal elements

Answer

Transition elements

Question 64

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

Answer 115

Inert gases

Answer 116

Alkaline earths

Answer 117

Rare earths

Answer 118

Lanthanides

Answer 119

Rare earth metals

Answer 120

Homovalent (show same valency)

Answer 121

Same number of electrons in the valence shell

Answer 122

Similar physical state

Answer 123

Remarkable reducing properties

Answer 124

Number of electrons lost

Answer 125

Its vacancies

Answer 126

Number of electrons gained

Answer 127

Apparent charge I compound

Answer 128

Br, Cl and F

Answer 129

Cl, F and Br

Answer 130

F, Cl and Br

Answer 131

Cl, Br and F

Answer 132

Remains constant

Answer 133

Cannot be predicted

Answer 134

Electronegativity

Answer 135

Ionization energy

Answer 136

Electron affinity

Answer 137

Atomic volume

Answer 138

Atomic mass

Answer 139

Atomic number

Answer 140

Number of valence electrons

Answer 141

Noble gases

Answer 142

Alkali metals

Answer 143

Inert metals

Answer 144

Group VIII

Answer 145

Group VII A

Answer 146

d – block elements

Answer 147

p – block elements

Answer 148

f – block elements

Answer 149

s – block elements

Answer 150

Dobereiner

Answer 151

Lother Meyer

Answer 152

2nd period

Answer 153

4th period

Answer 154

5th period

Answer 155

3rd period

Answer 156

Alkali metals (I-A)

Answer 157

Group-14 elements (IV-A)

Answer 158

Group-18 elements (VIII-A)

Answer 159

Halogens (VII-A)

Answer 160

2nd and 3rd both

Answer 161

Bonding behavior

Answer 162

Ionization potential

Answer 163

Neutron/proton ration

Answer 164

Electronegativity

Answer 165

Elements from Li to Ne

Answer 166

Alkaline earth metal

Answer 167

Alkali metal

Answer 168

Atomic radii

Answer 169

Ionization energy

Answer 170

Atomic volume

Answer 171

m.P and B.P

Answer 172

Both b & c

Answer 173

Mg < Na < Rb < K

Answer 174

Mg < Na < K < Rb

Answer 175

Na < K < Rb < Mg

Answer 176

Mg < K < Na < Rb

Answer 177

Lanthanide series

Answer 178

Alkali metals

Answer 179

Actinide series

Answer 180

Alkaline earth metals

Answer 181

Zn, Cr, Na

Answer 182

The atomic number

Answer 183

The charge on the nucleus

Answer 184

The shielding constant

Answer 185

Both the nuclear charge and the shielding constant

Answer 186

Hydrogen resembles in properties with IA, IVA and VIIA elements

Answer 187

Hydrogen resembles in properties with IIA, IVA and VIA elements

Answer 188

Hydrogen resembles in properties with IIIA, IVA and VA elements

Answer 189

Hydrogen resembles in properties with IIA, IIIA and VIIIA elements

Answer 190

Atom will gain electron easily

Answer 191

Atom may form di-positive ion

Answer 192

The reason is unknown

Answer 193

Atom will lose electron easily

Answer 194

Alkali metals

Answer 195

Rare earth metals

Answer 196

Inert gases

Answer 197

Alkaline earth metals

Answer 198

F O C Cl Br

Answer 199

F Cl Br O C

Answer 200

C O F Cl Br

Answer 201

F C O Cl Br

Answer 202

Zero group element

Answer 203

Having completely filled valence shell

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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Chemistry Periodic Classification Of Elements & Periodicity Online Test

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Important Periodic Classification Of Elements & Periodicity Question and Answer

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