Chemical Building Blocks of Life UPSC Questions

Biology

Chemical Building Blocks of Life MCQ Questions


7.

What is the name of the reaction of this equation :
Magnesium + Oxygen → Magnesium Oxide

A.

Physical Reaction

B.

No Reaction

C.

Chemical Reaction

D.

Electrical Reaction

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ANSWER :

C. Chemical Reaction

8.

What is the name of the new substance, magnesium oxide, formed during the reaction ?
Magnesium + Oxygen → Magnesium Oxide

A.

Product

B.

Material

C.

Oxygen

D.

None of these

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ANSWER :

A. Product

9.

______________ prevents the chips from getting oxidised.

A.

Nitrogen

B.

Oxygen

C.

Hydrogen

D.

Oxide

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ANSWER :

A. Nitrogen

10.

Chips manufacturers usually flush bags of chips with 

A.

Liquid

B.

Gas

C.

Solid

D.

Acid

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ANSWER :

B. Gas

11.
Chemical equations can be made more concise and useful if we use _____________ instead of words.
A.
Chemical Equation
B.
Chemical Energy
C.
Chemical Reaction
D.
Chemical Formulae
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ANSWER :
D. Chemical Formulae
12.
What represents a chemical reaction?
A.
Product
B.
Chemical Formulae
C.
Chemical Equation
D.
Chemical Energy
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ANSWER :
C. Chemical Equation