S Block Elements Mcqs

Our collections of Multiple choice questions and answers focuses on study of S Block Elements in Chemistry. These questions are chosen from a collection of most authoritative and best reference books on Chemistry. Our aim is to prepare an individual for competitive exams like NTS, GAT, ECAT, MDCAT, Teaching jobs Tests and Chemical industry job interviews. One should practice our Mcqs to assimilate S Block Elements in Chemistry comprehensively.

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16.
Ammonia may be prepared by heating ammonium chloride with

Water

NaCl

Aqueous sodium hydroxide

H2SO4

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18.
Crystals of Na2CO3. 10H2O when exposed to air

Lose water and remain solid

Gain water and remain solid

Gain water and become liquid

Remains unchanged

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19.
Which one of the following substances conducts electricity by the movement of ions?

Graphite

Copper

Molten sodium chloride

Mercury

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20.
Which one of the following gives white precipitate with aqueous solution of BaC?2?

NaHCO3

NaNO3

Na2CO3

Na2CrO4

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22.
The deliquescence is a property in which a solid

Absorbs moisture and remains solid

Absorbs moisture and turns to liquid form

Loses water of crystallization

Increases the number of water of crystallization

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24.
In diaphragm cell level of brine in anode compartment is kept slightly higher which prevents

Hydroxide ions to reach anode

Chlorine gas to mix

Cathode to decay

All of the above

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26.
Alkali and alkaline earth metals impart colours when heated over burner. It is due to

Smaller electronegativity of alkali metals

Smaller ionic radius of these metals

De-excitation of electrons from higher energy levels to low energy level

Excitation of electrons from low energy levels to higher energy levels

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27.
Which one of the following alkali metals forms only normal oxide when it reacts with O2?

Lithium

Sodium

Potassium

Rubidium

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28.
First ionization potential of alkaline earth metal is greater than alkali metals because

They are more reactive

They have greater atomic radii

They have smaller atomic sizes

All

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29.
Which one of the following pairs shown diagonal relationship in the periodic table?

Sodium and Lithium

Lithium and magnesium

Lithium and beryllium

Boron and Beryllium

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30.
NaOH is named as caustic soda because

It corrodes the organic tissues

It is used in soda water

It reacts with chlorine gas

It reacts with fats to form soap

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