Question # 1

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

Which of the following has greatest tendency to lose electron?

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F

Fr

S

Be

Which of the following has highest first ionization potential?

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Carbon

Oxygen

Nitrogen

Boron

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

The elements of f-block are also known as

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Inner-transition

Outer transition

Normal elements

Alkaline earth metals

Transition elements have valence electrons in

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s-orbital

p-orbital

d-orbital

f-orbital

The valence shell of hydrogen is half filled like those of

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IV - A

VIA

V - A

VIIA

The element with atomic number 26 will be found in group

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2

8

6

10

The structure of complex hydrides is

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Tetrahedal

Trigonal

Octahedral

Square planar

Which is the most volatile compound

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Hl

HCl

HBr

HF

The number of groups in the periodic table is

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6

7

8

9

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

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K⁺

Ca²⁺

Cl^-

S^2-

The classify the elements, Newland gave the idea of

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Octaves

Triads

Atomic volume

Atomic mass

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

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Ga

Hg

Ge

Cs

Which of the following element has the maximum electron affinity?

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F

S

I

Cl

The fourth period contains elements

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8

16

18

32

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

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

Which of the following does not exhibit the periodicity in properties of the elements?

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Ionisation energy

N/P ratio

Electronegativity

Atomic radius

NaH is

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Ionic hydride

Complex hydride

Covalent hydride

Interstitial hydride

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 oxides is unlikely to dissolve in aqueous hydroxide

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Al₂O₃

MgO

SO₂

SIO₂

Doberiner arranged the similar elements into

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Pairs

Triads

Triplets

Rows

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

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Atomic number

Properties

Atomic weight

Family group

What is the nature of SO₂

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Basic

Strongly acidic

Weakly acidic

Amphoteric

How does the ionization energy of 1st group elements vary?

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Increases down the group

Decreases down the group

Remains unchanged

Variation is not regular

Which of the following pair of atomic numbers represents s-block elements?

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7, 15

6, 12

9, 17

3, 20

The coinage metals are

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Ni, Pd, Pt

Cu, Ag, Au

Zn, Al, Pb

Fe, Si, Sn

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

Which is true about the electronegativity order of the following?

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P > Si

C > N

Br > Cl

Sr > Ca

The coinage metals are

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Ni, Pd, Pt

Cu, Ag, Au

Zn, Al, Pb

Fe, Si, Sn

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

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