Question # 1

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

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K⁺

Ca²⁺

Cl^-

S^2-

For the representative elements from left to right across a period in the periodic table, the electron effinity of the atom generally

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Increases

Remains constant

Decreases

Not clear

Ionic hydrides are generally

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Liquid at room temperature

Good electrical conductors

Good reducing agents

Easily reduced

From ₃₉Y to ₄₈Cd are called

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Transition elements

Outer transition elements

Inner transition elements

2nd transition series

In the modern long form of the periodic table elements are arranged in the increasing order of

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Atomic mass

Atomic number

Mass number

Isotopic number

Electron affinity depends on

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Atomic size

Nuclear charge

Atomic number

Atomic size and nuclear charge both

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

What is the nature of Al₂O₃

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Acidic

Basic

Amphoteric

Neutral

The valency, ionization energy and electrongativity of elements are related to its

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Atomic number

Properties

Atomic weight

Family group

The amount of energy required to remove an electron from an atom of an element in the gaseous state is called

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Electron affinity

Electronegatively

Ionization energy

None of these

Which of the following has highest first ionization potential?

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Carbon

Oxygen

Nitrogen

Boron

According to Mendleev, the physical and the chemical properties are the periodic function of their

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Atomic number

Atomic mass

Atomic wt

None

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

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s-block

p-block

d-block

f-block

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

The coinage metals are

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Ni, Pd, Pt

Cu, Ag, Au

Zn, Al, Pb

Fe, Si, Sn

From left to right, atomic radii of transition elements

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Increases

Decreases

Remain same

None of the above

Which of the following is most electronegative?

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Carbon

Silicon

Lead

Tin

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

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Groups

Periods

Blocks

Sub group

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

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The shielding constant

The atomic number

The charge on the nucleus

Both the nuclear charge and the shielding constant

Na₂O is

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Acidic

Basic

Neutral

Amphoteric

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

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8

10

18

32

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

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Mg

Rb

Li

Cl

Which is the most volatile compound

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Hl

HCl

HBr

HF

Which of the following elements is most electronegative?

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Oxygen

Chlorine

Nitrogen

Fluorine

Which of the following oxides is amopheric in character?

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CaO

CO₂

SiO₂

SnO₂

The fourth period contains elements

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8

16

18

32

The hydration energy is the heat evolved when one mole of gaseous ion is dissolved in water. The hydration energy of an ion

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Increases with increase of charge to mass ratio

Decreases with increase of charge to mass ratio

Depends on sign of charge +ve or -ve

Depends upon the solvent

Each vertical column of the periodic table includes elements with chemical characteristics that are in general

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Identical

Similar

Different

Similar as well as different

Doberiner arranged the similar elements into

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Pairs

Triads

Triplets

Rows

The element with highest electron affinity among the halogen is

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F

Cl

Br

I

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

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