Question # 1

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

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Ga

Hg

Ge

Cs

The fourth period contains elements

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8

16

18

32

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

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Rb

Cs

K

Na

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

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K⁺

Ca²⁺

Cl^-

S^2-

What is the nature of Al₂O₃

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Acidic

Basic

Amphoteric

Neutral

The elements of sub-group A are called

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Transition elements

Main elements

Typical elements

Rare earth elements

What is the nature of SO₂

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Basic

Strongly acidic

Weakly acidic

Amphoteric

The structure of complex hydrides is

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Tetrahedal

Trigonal

Octahedral

Square planar

Which orbital is in the process of completion in case of transition elements

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p-orbital

f-orbital

d-orbital

s-orbital

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

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Electron affinity

Electronegativity

Ionisation energy

Valency

All the elements belongs to the 2nd period are

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Normal elements

Transition elements

Stable elements

Halogens

The elements of group lA are called

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Chalocogens

Halogens

Alkali metals

Alkaline earth metals

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

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