Aerospace Materials Mcqs

Q:

Pure zinc in metallic form was discovered by a __________ chemist.

A) Persian B) Indian
C) American D) German
 
Answer & Explanation Answer: D) German

Explanation: Pure zinc in metallic form was discovered by a German-based chemist. Andreas Sigismund Marggraf is the chemist that discovered zinc in a pure metallic state. The word ‘zinc’ is also derived from the German word “Zinke”.

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Q:

Zinc is ___________ in colour.

A) black B) yellow
C) bluish-silver D) red
 
Answer & Explanation Answer: C) bluish-silver

Explanation: Zinc is an element that is typically bluish-silver in colour. Some elements that are black in colour are boron and carbon. The element bromine is red in colour. Sulfur, chlorine, etc. are yellow in color.

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6
Q:

The melting point of zinc is __________

A) 1495°C B) 1445°C
C) 787.1°C D) 787.1°F
 
Answer & Explanation Answer: D) 787.1°F

Explanation: The melting point of an element is the point of temperature at which the phase of the element changes. The melting point of zinc is 787.1°F. 1495°C is the melting point of the element cobalt.

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5
Q:

Zinc is an element that is being used fairly recently.

A) True B) False
 
Answer & Explanation Answer: B) False

Explanation: Zinc has been used extensively in the past and is being used in the present as well. Zinc was not produced on a bigger scale until the twelfth century but was used before that as well.

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5
Q:

Which of the following are ores of zinc?

A) Cobaltite B) Erythrite
C) Marmatite D) Marmatite
 
Answer & Explanation Answer: C) Marmatite

Explanation: Zinc and most elements are rarely found in their pure state, they are found in the form of ores. Zinc is also found in the form of like in like Marmatite, zinc sulphide (ZnS), Calamine, etc. in different places.

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4
Q:

Zinc is alloyed with which of the following elements frequently?

A) Vanadium B) Copper
C) Helium D) Rutherfordium
 
Answer & Explanation Answer: B) Copper

Explanation: Zinc is often alloyed with the element copper to obtain the metal alloy brass. It is used extensively for several purposes like decorative items. Zinc is also alloyed with several elements like tin, aluminium etc.

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6
Q:

Zinc is a non-lustrous element.

A) True B) False
 
Answer & Explanation Answer: B) False

Explanation: The above statement is incorrect. Zinc is an element that is lustrous. It is solid at room temperature and is also slightly brittle in nature. Zinc is a post-transition element in the periodic table.

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6
Q:

Zinc in the form of ores can be found in which of the following places?

A) Antarctica B) Canada
C) Canada and Russia D) Russia and Antarctica
 
Answer & Explanation Answer: C) Canada and Russia

Explanation: Zinc is found in the form of ores in various places across the world. It is frequently found in countries like Canada, Russia, the United States of America, etc. The ore has to undergo several processes to obtain pure zinc.

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