Chemistry Periodic Classification Of Elements & Periodicity Online Test

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Question 1

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

Question 2

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

Answer

Rutherford

Answer

Dobereiner

Answer

Lother Meyer

Question 3

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

Question 4

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

Answer

Cu, Ag, Au

Answer

Ag, Au, Hg

Answer

Cu, Hg, Au

Answer

Cu, Fe, Au

Question 5

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

Answer

Physical properties

Answer

Properties of their compounds

Answer

Chemical properties

Question 6

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

Answer

Atomic numbers

Answer

Atomic masses

Question 7

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

Answer

Group VII-A

Answer

Group II-A

Answer

Group VI-A

Answer

Group IV-A

Question 8

8. Elements with similar chemical properties appear in 1 the

Answer

Same period

Answer

p block elements

Answer

Right upper corner

Answer

Same family

Question 9

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

Question 10

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

Question 11

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

Question 12

12. The electronegativity of Si is

Question 13

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

Answer

Data is insufficient

Answer

Endothermic

Answer

Exothermic

Question 14

14. Higher value of electron affinity means

Answer

Atom will gain electron easily

Answer

Atom will lose electron easily

Answer

The reason is unknown

Answer

Atom may form di-positive ion

Question 15

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

Question 16

16. 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 17

17. 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 O C Cl Br

Answer

F C O Cl Br

Question 18

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

Question 19

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

Answer

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

Answer

All above statements are correct

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 20

20. Which of the following elements is most electronegative?

Question 21

21. The atomic radii decreases by increasing atomic number in

Answer

Elements from Li to Ne

Answer

Alkali metal

Answer

Alkaline earth metal

Question 22

22. Which of the following possess maximum hydration power?

Question 23

23. Non-metals usually form ________ oxides.

Answer

All of the above

Answer

Amphoteric

Question 24

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

Answer

As < Cl < P < S < Sb

Answer

Sb < As < S < P < Cl

Answer

Cl < Sb < P < As < S

Answer

Sb < As < Cl < S < P

Question 25

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

Answer

Ionization energy of elements

Answer

MP of elements

Answer

BP of elements

Answer

Coordination number of icons

Question 26

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

Question 27

27. Variable valency is generally exhibited by

Answer

Transition elements

Answer

None of these

Answer

Normal elements

Answer

Metallic elements

Question 28

28. Inner transition elements are called

Answer

Lanthanides

Answer

Rare earth metals

Question 29

29. 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

O– ion has comparatively larger size oxygen atom

Answer

Oxygen has high electron affinity

Answer

Oxygen is more electronegative

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. Elements whose atoms have two outermost shells incomplete are called

Answer

s – block elements

Answer

p – block elements

Answer

d – block elements

Answer

f – block elements

Question 32

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

Answer

Atomic radii

Answer

Ionization energy

Answer

m.P and B.P

Answer

Atomic volume

Question 33

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

Answer

Inert gases

Answer

Rare earths

Answer

Alkaline earths

Question 34

34. 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 35

35. Hydrogen resembles with carbon because of having

Answer

Remarkable reducing properties

Answer

Similar physical state

Answer

Homovalent (show same valency)

Answer

Same number of electrons in the valence shell

Question 36

36. Metals form halides which are

Question 37

37. The periodic table consists of

Answer

8 horizontal and 7 vertical series

Answer

7 horizontal and 7 vertical series

Answer

8 horizontal and 18 vertical series

Answer

7 horizontal and 18 vertical series

Question 38

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

Answer

Atomic mass

Answer

Atomic number

Answer

Valence electrons

Question 39

39. The atomic radii decrease by increasing atomic number in

Answer

Elements from Li to Ne

Answer

Alkaline earth metal

Answer

Alkali metal

Question 40

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

Question 41

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

Answer

Mg < Na < Rb < K

Answer

Mg < K < Na < Rb

Answer

Na < K < Rb < Mg

Answer

Mg < Na < K < Rb

Question 42

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

Question 43

43. 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

Ionization energy

Answer

Electron affinity

Question 44

44. The element with highest first ionization energy is

Question 45

45. The element with atomic number 14 belongs to

Answer

4th period

Answer

3rd period

Answer

5th period

Answer

2nd period

Question 46

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

Question 47

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

Question 48

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

Question 49

49. 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 50

50. Mark the Dobereiner triad

Answer

Zn, Cr, Na

Question 51

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

Question 52

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

Question 53

53. The longest period in the modern periodic table is

Answer

2nd and 3rd both

Question 54

54. Magnesium keeps on burning in

Answer

N₂ as well as Co₂

Question 55

55. 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 shielding constant

Answer

The charge on the nucleus

Answer

The atomic number

Question 56

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

Answer

Rare earth metals

Answer

Alkaline earth metals

Answer

Inert gases

Answer

Alkali metals

Question 57

57. Which order of ionization energy is correct?

Answer

Both b & c

Question 58

58. The electronegativity of Sodium is

Question 59

59. Shielding effect across the period

Answer

Remains constant

Answer

Cannot be predicted

Question 60

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

Answer

All are stable

Question 61

61. Noble gases are named so because they are

Answer

Having completely filled valence shell

Answer

Zero group element

Question 62

62. Oxidation state of an atomic represent

Answer

No of e lost

Answer

No of e gained

Answer

No of e gained or/lost

Question 63

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

Question 64

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

Answer 130

Hydrogen resembles in properties with IIA, IVA and VIA elements

Answer 131

Hydrogen resembles in properties with IIA, IIIA and VIIIA elements

Answer 132

Hydrogen resembles in properties with IIIA, IVA and VA elements

Answer 133

Hydrogen resembles in properties with IA, IVA and VIIA elements

Answer 134

Cr, In, Pb

Answer 135

Ca, Cr, Zn

Answer 136

Dobereiner

Answer 137

Lother Meyer

Answer 138

Ca₃ (PO4)₂

Answer 139

The ionization energy of calcium is higher than that of magnesium

Answer 140

The ionization energy of calcium is lower than that of barium

Answer 141

The ionization energy of calcium is than that of beryllium

Answer 142

The ionization energy of calcium is lower than that of strontium

Answer 143

Actinide series

Answer 144

Alkali metals

Answer 145

Alkaline earth metals

Answer 146

Lanthanide series

Answer 147

Charge on its ions

Answer 148

Acidic or basic nature of oxides

Answer 149

The number of isotopes it has

Answer 150

The formula of its oxides

Answer 151

Group-14 elements (IV-A)

Answer 152

Alkali metals (I-A)

Answer 153

Halogens (VII-A)

Answer 154

Group-18 elements (VIII-A)

Answer 155

Atomic radii

Answer 156

Ionization energy

Answer 157

Atomic volume

Answer 158

Melting & boiling points

Answer 159

Both form ionic compounds

Answer 160

Similar outer most shell electronic configuration

Answer 161

Both are electropositive

Answer 162

Atomic mass

Answer 163

Atomic number

Answer 164

Number of valence electrons

Answer 165

Atomic volume

Answer 166

Both are electropositive

Answer 167

Both are not found in free state

Answer 168

Similar electronic configuration

Answer 169

All the noble gases are present in the same period

Answer 170

All lanthanides are present in the same group

Answer 171

All the alkali metals are present in the same period

Answer 172

All halogens are present in the same period

Answer 173

Remain same

Answer 174

Increase down the group

Answer 175

No regular trend

Answer 176

Decrease down the group

Answer 177

Neutron/proton ration

Answer 178

Ionization potential

Answer 179

Bonding behavior

Answer 180

Electronegativity

Answer 181

Number of electrons gained

Answer 182

Its vacancies

Answer 183

Apparent charge I compound

Answer 184

Number of electrons lost

Answer 185

Highest electronegativity

Answer 186

Highest IE

Answer 187

Smallest size

Answer 188

Group VII A

Answer 189

Group VIII

Answer 190

Lanthanides

Answer 191

Rare earth metals

Answer 192

Na⁺ is smaller than Na atom

Answer 193

Cl⁺ (ions are equal in size)

Answer 194

Na⁺ is larger than Na atom

Answer 195

Cl⁺ is smaller than Cl atom

Answer 196

Elements with atomic number 17 and 53

Answer 197

Elements with atomic numbers 20 and 40

Answer 198

Elements with atomic number 17 and 38

Answer 199

Elements with atomic number 11 and 33

Answer 200

Henry Becquerel’s natural radioactivity

Answer 201

Location of nucleus by Rutherford

Answer 202

x-rays by Roentgen

Answer 203

Atomic number by Moseley

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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