1
NDA General Ability 16 April 2023
MCQ (Single Correct Answer)
+4
-1.33
Change Language
Mica is mainly used in:
A
food and beverage industry.
B
iron and steel industry.
C
aluminium industry.
D
electrical and electronic industries.
2
NDA General Ability 16 April 2023
MCQ (Single Correct Answer)
+4
-1.33
Change Language
What is the specific purpose of using potassium hydroxide during the saponification process?
A
To obtain soaps which are hard on the skin
B
To obtain soaps which are soft on the skin
C
To obtain natural fragrance
D
To make the saponification very economical
3
NDA General Ability 16 April 2023
MCQ (Single Correct Answer)
+4
-1.33
Change Language
Which one of the following is the correct arrangement of metals in the decreasing order of their reactivity?
A
Iron, Sodium, Silver, Copper
B
Silver, Copper, Iron, Sodium
C
Sodium, Copper, Silver, Iron
D
Sodium, Iron, Copper, Silver
4
NDA General Ability 16 April 2023
MCQ (Single Correct Answer)
+4
-1.33
Change Language
Which among the following statements is not correct with respect to allotropes of Carbon?
A
Graphite is a good conductor of electricity.
B
Diamond is the hardest substance known.
C
Fullerene is one of the allotropes of carbon.
D
Next to diamond, graphite is the second hardest known substance.
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