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1.

In the production of perspex, what is the catalyst used? 

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A.

Lauryl peroxide 

B.

Benzoid peroxide 

C.

Ultraviolet light 

D.

Finely divided iron 

Explanation. Give a better Explanation

A✅✅
During the production of perspex, lauryl peroxide is used.

During the production of bakelight, benzoid peroxide is used..

Finely devided iron serves as catalyst in the preparation of ammonia(Haber process)

Ultraviolet light serves as catalyst when alkane e.g react substitutely with halogens..


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2.

Who discovered Hydrogen

 

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A.

Ballard 

B.

Courtios

C.

Cavendish 

D.

Lavousier 

Explanation. Give a better Explanation

Cavendish discovered hydrogen, lavousier name it water former.. Courtios and Ballard discovered bromine and iodine respectively..

 

Scheele discovered chlorine and Davy named it...



3.

 

 

The corrosion of iron is called?

 

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A.

Cupper partina

B.

Rusting

C.

Galvanizing 

D.

Pickling 

Explanation. Give a better Explanation

B✅✅

The corrosion of iron is called *Rusting* ..

The corrosion of cupper is called *cupper partina* 

Coating of iron with zinc to prevent corrosion is known as *Galvanizing* 

 *Picking* is the process of removing impurities from metals prior to electroplating.. Using concentrated acid.. E.G HCL

 



4.

 

 

Who is the person that discovered penicillin?

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A.

lous pastaeur

B.

Hugo de varies 

C.

Alexander Fleming 

D.

Rodulf virvichow 

Explanation. Give a better Explanation

C✅✅

 

 *Pasteur* Is the first man that started the work of antibiotics

 

 *Hugo de varies* is known as the father of mutation

 

 *Alexander Fleming* discovered penicillin

 

 *Rodulf virvichow* composed that plant and animals are made up of cell and the product of cell..

 



5.

What element is used as deoxidant in steel casting? 

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A.

Calcium

B.

Magnesium 

C.

Oxygen 

D.

Chlorine 

Explanation. Give a better Explanation

Calcium is used as deoxidant in steel and alloy casting 

Magnesium is used in metallurgy

Oxygen is used to remove impurities from pig iron.. It is called tonage oxygen 



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