Chemistry Periodic Classification Of Elements & Periodicity Online Test

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Question 1

1. Mark the correct statement

Answer

Na⁺ is smaller than Na atom

Answer

Cl⁺ is smaller than Cl atom

Answer

Cl⁺ (ions are equal in size)

Answer

Na⁺ is larger than Na atom

Question 2

2. Mark the Dobereiner triad

Answer

Zn, Cr, Na

Question 3

3. The electronegativity of Si is

Question 4

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

Question 5

5. Which statement is correct?

Answer

Hydrogen resembles in properties with IA, IVA and VIIA elements

Answer

Hydrogen resembles in properties with IIA, IVA and VIA elements

Answer

Hydrogen resembles in properties with IIIA, IVA and VA elements

Answer

Hydrogen resembles in properties with IIA, IIIA and VIIIA elements

Question 6

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

Question 7

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

Answer

F C O Cl Br

Answer

F O C Cl Br

Answer

C O F Cl Br

Answer

F Cl Br O C

Question 8

8. Which one is not an ionic hydride?

Question 9

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

Question 10

10. Which has largest first ionization energy?

Question 11

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

Question 12

12. Non-metals usually form ________ oxides.

Answer

Amphoteric

Answer

All of the above

Question 13

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

Answer

Coordination number of icons

Answer

MP of elements

Answer

BP of elements

Answer

Ionization energy of elements

Question 14

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

Question 15

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

Answer

Bonding behavior

Answer

Ionization potential

Answer

Neutron/proton ration

Answer

Electronegativity

Question 16

16. Mark the elements that belong to same period:

Answer

Cr, In, Pb

Answer

Ca, Cr, Zn

Question 17

17. The element with highest first ionization energy is

Question 18

18. 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

Electron affinity

Answer

Electronegativity

Answer

Ionization energy

Question 19

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

Answer

Both the nuclear charge and the shielding constant

Answer

The charge on the nucleus

Answer

The atomic number

Answer

The shielding constant

Question 20

20. Inner transition elements are called

Answer

Rare earth metals

Answer

Lanthanides

Question 21

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

Question 22

22. Elements with similar chemical properties appear in 1 the

Answer

Same family

Answer

Same period

Answer

p block elements

Answer

Right upper corner

Question 23

23. The electronegativity of Sodium is

Question 24

24. Californium is the member of

Answer

Alkaline earth metals

Answer

Lanthanide series

Answer

Alkali metals

Answer

Actinide series

Question 25

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

Question 26

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

Answer

Group VII-A

Answer

Group VI-A

Answer

Group II-A

Answer

Group IV-A

Question 27

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

Question 28

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

Answer

All are stable

Question 29

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

Question 30

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

Question 31

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

Answer

Atomic volume

Answer

m.P and B.P

Answer

Atomic radii

Answer

Ionization energy

Question 32

32. 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 33

33. 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 34

34. Shielding effect across the period

Answer

Cannot be predicted

Answer

Remains constant

Question 35

35. Mark the correct statement

Answer

The ionization energy of calcium is lower than that of strontium

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 than that of beryllium

Question 36

36. 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 numbers 20 and 40

Answer

Elements with atomic number 17 and 53

Question 37

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

Answer

All above statements are correct

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

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

Question 38

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

Question 39

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

Answer

Group-14 elements (IV-A)

Answer

Group-18 elements (VIII-A)

Answer

Alkali metals (I-A)

Answer

Halogens (VII-A)

Question 40

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

Question 41

41. 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 42

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

Answer

Melting & boiling points

Answer

Ionization energy

Answer

Atomic volume

Answer

Atomic radii

Question 43

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

Answer

Both are not found in free state

Answer

Both are electropositive

Answer

Similar electronic configuration

Question 44

44. Oxidation state of an atom represent

Answer

Its vacancies

Answer

Apparent charge I compound

Answer

Number of electrons lost

Answer

Number of electrons gained

Question 45

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

Answer

Atomic masses

Answer

Atomic numbers

Question 46

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

Answer

Lother Meyer

Answer

Dobereiner

Answer

Rutherford

Question 47

47. The highly electronegativity atom is

Question 48

48. Alkali metals in each period have

Answer

Smallest size

Answer

Highest electronegativity

Answer

Highest IE

Question 49

49. Which order of ionization energy is correct?

Answer

Both b & c

Question 50

50. Which of the following has highest electropositive character?

Question 51

51. Which of the following possess maximum hydration power?

Question 52

52. Which of the pair of metalloids?

Question 53

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

Question 54

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

Answer

Atomic volume

Answer

Atomic number

Answer

Number of valence electrons

Answer

Atomic mass

Question 55

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

Question 56

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

Question 57

57. Hydrogen resembles with carbon because of having

Answer

Homovalent (show same valency)

Answer

Similar physical state

Answer

Remarkable reducing properties

Answer

Same number of electrons in the valence shell

Question 58

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

Answer

Mg < Na < K < Rb

Answer

Mg < K < Na < Rb

Answer

Na < K < Rb < Mg

Answer

Mg < Na < Rb < K

Question 59

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

Answer

Dobereiner

Answer

Lother Meyer

Question 60

60. Which one is the strongest reducing agent?

Question 61

61. The atomic radii decreases by increasing atomic number in

Answer

Elements from Li to Ne

Answer

Alkaline earth metal

Answer

Alkali metal

Question 62

62. Seventh period contains ____________ normal elements

Question 63

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

Question 64

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

Answer

Chemical properties

Answer

Physical properties

Answer

Properties of their compounds

Answer 121

Endothermic

Answer 122

Data is insufficient

Answer 123

Exothermic

Answer 124

Alkali metal

Answer 125

Alkaline earth metal

Answer 126

Elements from Li to Ne

Answer 127

2nd and 3rd both

Answer 128

Ca₃ (PO4)₂

Answer 129

Zero group element

Answer 130

Having completely filled valence shell

Answer 131

Group VIII

Answer 132

Group VII A

Answer 133

The number of isotopes it has

Answer 134

Acidic or basic nature of oxides

Answer 135

The formula of its oxides

Answer 136

Charge on its ions

Answer 137

Lanthanides

Answer 138

Rare earth metals

Answer 139

8 horizontal and 7 vertical series

Answer 140

7 horizontal and 18 vertical series

Answer 141

8 horizontal and 18 vertical series

Answer 142

7 horizontal and 7 vertical series

Answer 143

O– ion has comparatively larger size oxygen atom

Answer 144

Oxygen has high electron affinity

Answer 145

Oxygen is more electronegative

Answer 146

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

Answer 147

Alkaline earths

Answer 148

Rare earths

Answer 149

Inert gases

Answer 150

None of these

Answer 151

Metallic elements

Answer 152

Transition elements

Answer 153

Normal elements

Answer 154

No regular trend

Answer 155

Remain same

Answer 156

Decrease down the group

Answer 157

Increase down the group

Answer 158

Location of nucleus by Rutherford

Answer 159

x-rays by Roentgen

Answer 160

Henry Becquerel’s natural radioactivity

Answer 161

Atomic number by Moseley

Answer 162

Valence electrons

Answer 163

Atomic number

Answer 164

Atomic mass

Answer 165

N₂ as well as Co₂

Answer 166

All the alkali metals are present in the same period

Answer 167

All the noble gases are present in the same period

Answer 168

All halogens are present in the same period

Answer 169

All lanthanides are present in the same group

Answer 170

s – block elements

Answer 171

f – block elements

Answer 172

d – block elements

Answer 173

p – block elements

Answer 174

s – block elements

Answer 175

d – block elements

Answer 176

f – block elements

Answer 177

p – block elements

Answer 178

No of e gained

Answer 179

No of e gained or/lost

Answer 180

No of e lost

Answer 181

Melting points of halogens decrease down the group

Answer 182

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

Answer 183

Melting points of halogens increases down the group

Answer 184

Melting points of halogens remains the same throughout the group

Answer 185

Inert gases

Answer 186

Alkaline earth metals

Answer 187

Alkali metals

Answer 188

Rare earth metals

Answer 189

F, Cl and Br

Answer 190

Br, Cl and F

Answer 191

Cl, F and Br

Answer 192

Cl, Br and F

Answer 193

Inert metals

Answer 194

Alkali metals

Answer 195

Noble gases

Answer 196

Ag, Au, Hg

Answer 197

Cu, Ag, Au

Answer 198

Cu, Hg, Au

Answer 199

Cu, Fe, Au

Answer 200

3rd period

Answer 201

5th period

Answer 202

4th period

Answer 203

2nd period

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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