1
NDA General Ability 4 September 2022
MCQ (Single Correct Answer)
+4
-1.33
Which of the following compounds undergoes/undergo thermal decomposition?
A
Zinc oxide
B
Silver oxide and zinc oxide
C
Silver oxide
D
Magnesium oxide
2
NDA General Ability 4 September 2022
MCQ (Single Correct Answer)
+4
-1.33
Silver artifacts get tarnished in the air due to the formation of
A
silver chloride
B
silver oxide
C
silver sulphide
D
silver sulphate
3
NDA General Ability 4 September 2022
MCQ (Single Correct Answer)
+4
-1.33
Bronze is an alloy of
A
Cu and Zn 
B
Cu and Sn 
C
Zn and Mg
D
Fe and Cu 
4
NDA General Ability 4 September 2022
MCQ (Single Correct Answer)
+4
-1.33
Which one of the following salts does not possess water of crystallization?
A
Potassium permanganate
B
Blue vitriol
C
Washing soda
D
Mohr’s salt