Question # 1

Which of the following does not exhibit the periodicity in properties of the elements?

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Ionisation energy

N/P ratio

Electronegativity

Atomic radius

Which of the following isoelectronic ions has the lowest ionization energy?

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K⁺

Ca²⁺

Cl^-

S^2-

The classify the elements, Newland gave the idea of

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Octaves

Triads

Atomic volume

Atomic mass

Doberiner arranged the similar elements into

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Pairs

Triads

Triplets

Rows

The element with atomic number 26 will be found in group

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2

8

6

10

Among the elements given below, the one with highest electropositivity is

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Cu

Cs

Cr

Ba

What is the nature of Al₂O₃

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Acidic

Basic

Amphoteric

Neutral

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

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Oxygen

Argon

Barium

Cesium

The number of elements in the 4th periods of periodic table is

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8

10

18

32

What is the nature of SO₂

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Basic

Strongly acidic

Weakly acidic

Amphoteric

The elements of group lA are called

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Chalocogens

Halogens

Alkali metals

Alkaline earth metals

How does the ionization energy of 1st group elements vary?

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Increases down the group

Decreases down the group

Remains unchanged

Variation is not regular

Eka-aluminium and Eka-silicon are known as

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Gallium and Germanium

Aluminium and silicon

Iron and sulphur

Proton and silicon

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

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Bonding behaviour

Electronegativity

Ionisation potential

Neutral/proton ratio

In a group form top to bottom, the hardness of alkali metals

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Remains unchanged

Increases

Decreases

None

The most distinctive character among the elements is their division into

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Metals and non-metals

Solids, liquids and gases

Atoms and molecules

Active and inactive elements

Which of the following elements should be the least metallic in character

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Rb

ln

Te

l

Which of the following is a member of -block

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Zn

Al

B

Br

The valence shell electronic structure of an element is ns²np⁵. The element will along to the group of

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Alkali metals

Inert metals

Noble gases

Halogen

The element with highest electron affinity among the halogen is

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F

Cl

Br

I

Which among the following species has the highest ionization energy?

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Ne

F

Li

B

All the elements belongs to the 2nd period are

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Normal elements

Transition elements

Stable elements

Halogens

The period table contains elements in vertical column. these vertical column are called

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Groups

Periods

Blocks

Sub group

The fourth period contains elements

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8

16

18

32

Which of the following ion has the highest value of ionic radius?

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Li⁺

F^-

O^2-

B³⁺

A pair of elements in the same family in the periodic classification is

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Cl and C

Ca and Al

N and Ne

Na and K

Gradual addition of electronic shells in the nobel gases causes a decrease in their

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Ionization energy

Atomic radius

Boiling point

Density

Ionic hydrides are generally

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Liquid at room temperature

Good electrical conductors

Good reducing agents

Easily reduced

Which of the following discoveries resulted in a version of the Mendeleefs

periodic law

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The nucleus of atom by Rutherford

The elements polonium and radium by the Curies

Atomic numbers by Moseley

x-rays by Roentgen

The elements of sub-group A are called

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Transition elements

Main elements

Typical elements

Rare earth elements

Which of the following statement about electron affinity of two elements is correct

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Carbon has greater than oxygen

Sulphur has less than oxygen

Iodine has greater than bromine

Bromine has less than chlorine

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ECAT Chemistry Chapter 12 Periodic Classification of Elements and Periodicity Online Test MCQs With Answers

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