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

Question # 1

Electron affinity depends on

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Atomic size

Nuclear charge

Atomic number

Atomic size and nuclear charge both

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Question # 2

Who gave the concept of atomic number

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Newton

Mosley

Dalton

Newland

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Question # 3

The elements of sub-group A are called

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Transition elements

Main elements

Typical elements

Rare earth elements

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Question # 4

According to Mendeleev, the properties of the elements are periodic function of their

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Atomic number

Atomic volumes

Atomic masses

Atomic densities

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Question # 5

Which is the transition element among the following

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Question # 6

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

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Groups

Periods

Blocks

Sub group

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Question # 7

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

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K⁺

Ca²⁺

Cl^-

S^2-

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Question # 8

Which of the following species has the highest ionization potential?

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Al⁺

Mg⁺

Li⁺

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Question # 9

Which of the following is an inert gas?

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H₂

O₂

N₂

Argon

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Question # 10

The oxides of which of the following elements will be acidic in character

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Question # 11

An element of the third period (Na to S) is heated in chlorine. The product is purified and then added to water. The resulting solution is found to be neutral. What is the element

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Sodium

Aluminium

Silicon

Phosphorus

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Question # 12

Which of the following represents elements in order of increasing atomic size?

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I, Br, Cl

Na, Mg, C

C, N, O

Li, Na, K

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