Question # 1

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

Which of the following oxides is unlikely to dissolve in aqueous hydroxide

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Al₂O₃

MgO

SO₂

SIO₂

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

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Cu

Cs

Cr

Ba

All the elements belongs to the 2nd period are

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Normal elements

Transition elements

Stable elements

Halogens

Which is the most volatile compound

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Hl

HCl

HBr

HF

Number of elements in the first period of the periodic table are

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Two

Four

One

Eight

The ionization potential is lowest for the

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Halogens

Inert gases

Alkaline earth metals

Alkali metals

Alkali metals in each period have

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Smallest size

Lowest IE

Highest IE

Highest electronegativity

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

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Rb

ln

Te

l

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

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Atomic number

Properties

Atomic weight

Family group

Gradation in properties in the periods of periodic tables are due to change in

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Atomic weight

The number of electrons

Number of protons

Electronic configuration

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

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Rb

Cs

K

Na

The elements of f-block are also known as

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Inner-transition

Outer transition

Normal elements

Alkaline earth metals

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

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Li⁺

F^-

O^2-

B³⁺

The correct order of electron affinity among the following is

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F > Cl > Br

Br > Cl > F

Cl > F > Br

F > Br > Cl

In a group, the ionization energy

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Increase

Decreases

Remain constant

First increases then decreases

Which of the following has highest oxidation potential

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Be

Li

Na

Ca

NaBH₄and LialH₄are

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Ionic hydrides

Covalent hydrides

Interposal hydrides

Complex hydrides

Electron affinity depends on

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Atomic size

Nuclear charge

Atomic number

Atomic size and nuclear charge both

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

The atomic radius increases as we move down a group because

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Effective nuclear charge increases

Atomic mass increases

Additive electrons are accommodated in new electron level

Atomic number increases

The coinage metals are

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Ni, Pd, Pt

Cu, Ag, Au

Zn, Al, Pb

Fe, Si, Sn

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

The melting point is lowest for

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Be

Mg

Ca

Sr

From ₃₉Y to ₄₈Cd are called

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Transition elements

Outer transition elements

Inner transition elements

2nd transition series

In the periodic table, the element with atomic number 16 will be placed in the group

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Fourteen

Sixteen

Thirteen

Fifteen

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

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

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Bonding behaviour

Electronegativity

Ionisation potential

Neutral/proton ratio

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

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

Which is true about the electronegativity order of the following?

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P > Si

C > N

Br > Cl

Sr > Ca

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

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