1
NDA General Ability 21 April 2024
MCQ (Single Correct Answer)
+4
-1.33
Change Language

Which among the following is the correct composition of Borax?

A

Sodium, Boron, Magnesium and Hydrogen

B

Sodium, Boron, Oxygen and Hydrogen

C

Potassium, Boron, Oxygen and Hydrogen

D

Sodium, Boron, Nitrogen and Hydrogen

2
NDA General Ability 21 April 2024
MCQ (Single Correct Answer)
+4
-1.33
Change Language

Which one among the following oxides has the highest melting point?

A

Na$_{2}$O

B

MgO

C

Fe$_{2}$O$_{3}$

D

CuO

3
NDA General Ability 3 September 2023
MCQ (Single Correct Answer)
+4
-1.33
Change Language
Galvanization is a method of protecting iron from rusting by coating with a thin layer of
A
Gallium
B
Aluminum
C
Zinc
D
Silver
4
NDA General Ability 3 September 2023
MCQ (Single Correct Answer)
+4
-1.33
Change Language
Which one of the following alloys contains a non-metal as one of its constituent?
A
Brass
B
Bronze
C
Amalgam
D
Steel
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