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1
NDA General Ability 10 April 2022
MCQ (Single Correct Answer)
+4
-1.33
Which one of the following is a chemical change?
A
Dissolving sugar in water
B
Melting of ice
C
Crystallization
D
Milk turning sour
2
NDA General Ability 10 April 2022
MCQ (Single Correct Answer)
+4
-1.33
Which one of the following is the correct molecular formula of ammonium carbonate if the valency of ammonium ion is (+1) and carbonate anion is (-2)?
A
(NH4)2CO3
B
NH4(CO3)2
C
(NH3)2CO3
D
NH4CO3
3
NDA General Ability 10 April 2022
MCQ (Single Correct Answer)
+4
-1.33
Which one of the following is a covalent compound?
A
Calcium oxide
B
Sodium nitride
C
Silicon carbide
D
Zinc sulphide
4
NDA General Ability 10 April 2022
MCQ (Single Correct Answer)
+4
-1.33
The mass number of argon is 40. Which one of the following statements is correct?
A
The number of protons in argon is 22.
B
The number of neutrons in argon is 18.
C
The number of electrons in argon is 18.
D
The sum of numbers of protons and electrons in argon is 40.
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Questions Asked from Marks 4
NDA General Ability 13 April 2025 (13) NDA General Ability 21 April 2024 (14) NDA General Ability 3 September 2023 (19) NDA General Ability 16 April 2023 (16) NDA General Ability 4 September 2022 (13) NDA General Ability 10 April 2022 (15) NDA General Ability 18 April 2021 (15)
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