Group III A and IVA Elements Mcqs

Our collections of Multiple choice questions and answers focuses on study of Group III A and IVA 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 Group III A and IVA Elements in Chemistry comprehensively.

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Sciences MCQS

16.
The process of aluminium extraction is called

Hall process

Thermite process

Haber process

Contact process

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17.
Because of its ability to combine with both oxygen and nitrogen aluminium metal is used

As nitrometer

To remove air bubbles from molten metal

To produce alloy

As insulator

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18.
Aqueous solution of borax above 62?C gives crystals of

Na2B4O7.4H2O

Na2B4O7.5H2O

Na2B4O7.2H2O

Na2B4O7.10H2O

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20.
Which of the following is not a use of silicon?

Lubricants

Hydraulic brakes

Antifreeze

Water repellent

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21.
Boron is non metal while other elements of IIIA group are metals. This is because

It has small size

It has high nuclear charge

It forms molecular addition compounds

All of the above

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22.
CO2 is gas while SiO2 is solid at room temperature.

Carbon is non-metal while silicon is semi-metal

CO2 is an independent molecule while SiO2 has network covalent structure

CO2 forms multiple bond while silicon does not form multiple bonds

Silicon has all sigma bonds

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23.
The coloured glassy mass in borax bead test is due to the formation of

Metal borate

Metal meta borate

Metal boride

Metal silicate

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24.
Identify the correct statement regarding CO

It combines with H2O to form carbonic acid

It reacts with red blood cells of haemoglobin

It is powerful oxidizing agent

It is used to prepare aerated drinks

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26.
If temperature of gallium arsenide is increased then its conductivity will

Decrease

Increase

Remains constant

First decreases then increases

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27.
Boric acid cannot be used

As antiseptic in medicine

For washing eyes

In soda bottles

For enamel and glazes

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