Question # 1

Ionization energy depends upon

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Nuclear charge

Atomic size

Shielding effect

All of the above

Although hydrogen resemble with the elements of group lA, IVA and Vll but it is usually placed in

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Group IA

Group IV A

Group VII

Group VIII

In sixth period 14 of its transition elements are called

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Lanthanides

Actinides

Radioactive elements

None

NaBH₄and LialH₄are

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Ionic hydrides

Covalent hydrides

Interposal hydrides

Complex hydrides

Which among the following elements have lowest value of IE₁?

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Pb

Sn

Si

C

The energy absorbed when an electron is added to a gaseous atom to form a gaseous ion is called

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Electron affinity

Ionization energy

Both of these

None of these

Two elements whose electronegativities are 1.2 and 3.0, the formed between them would be

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Ionic

Covalent

Coordinate

Metallic

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 correct arrangement of increasing order of atomic radius among Na, K, Mg, Rb is

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Mg < K < Na < Rb

Mg < Na < K < Rb

Mg < Na < Rb < K

Na < K < Rb < Mg

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 the periodic law, the chemical properties of the elements are periodic functions of their

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Density

Atomic number

Atomic mass

Mass number

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

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

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Oxygen

Argon

Barium

Cesium

In a group, the ionization energy

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Increase

Decreases

Remain constant

First increases then decreases

Which is not interstitial hydride

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LaH

VH

TaH

None

From ₃₉Y to ₄₈Cd are called

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Transition elements

Outer transition elements

Inner transition elements

2nd transition series

The ionization potential is lowest for the

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Halogens

Inert gases

Alkaline earth metals

Alkali metals

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

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Mg

Rb

Li

Cl

Which among the following species has the highest ionization energy?

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Ne

F

Li

B

Doberiner arranged the similar elements into

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Pairs

Triads

Triplets

Rows

The electropositive elements from

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Acidic oxides

Basic oxides

Neutral oxides

None

The statement that the properties of every eight elements are similar to the first is the law of

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Dobereiner

Newland

Mendeleev

L. Meyer

Which of the following sets of atomic numbers belong to that of the alkali metals?

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1,12,30,4,62

37,19,3,55

9,17,35,53

12,20,56,88

The alkali metal which is liquid at 15°C is

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K

Cs

Na

None

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

Na₂O is

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Acidic

Basic

Neutral

Amphoteric

Which is the transition element among the following

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B

Al

Cu

Cs

The elements with atomic numbers 9, 17, 35, 53, 85 an all

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Noble gases

Halogens

Heavy metals

Light metals

The coinage metals are

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Ni, Pd, Pt

Cu, Ag, Au

Zn, Al, Pb

Fe, Si, Sn

The elements of f-block are also known as

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Inner-transition

Outer transition

Normal elements

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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