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1
NDA General Ability 18 April 2021
MCQ (Single Correct Answer)
+4
-1.33
Which one of the following is the chemical formula of Hypobromous acid?
A
HBrO4
B
HOBr
C
HBr
D
HBrO3
2
NDA General Ability 18 April 2021
MCQ (Single Correct Answer)
+4
-1.33
Which one of the following is not used as a raw material in the manufacture of glass?
A
Soda
B
Alumina
C
Borax
D
Gypsum
3
NDA General Ability 18 April 2021
MCQ (Single Correct Answer)
+4
-1.33
In electrolytic refining of copper, the electrolyte is a solution of
A
Acidified copper chloride.
B
Acidified copper sulphate.
C
Potassium chloride.
D
Sodium sulphate.
4
NDA General Ability 18 April 2021
MCQ (Single Correct Answer)
+4
-1.33
Solder is an alloy of
A
Cu and Sn.
B
Fe and Zn.
C
Pb and Sn.
D
Ag and Zn.
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