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1
NDA General Ability 16 April 2023
MCQ (Single Correct Answer)
+4
-1.33
Which of the hydrocarbons are arranged as per the increasing order of their boiling points?
A
Methane, Butane, Propane, Heptane
B
Propane, Butane, Pentane, Octane
C
Propane, Butane, Heptane, Methane
D
Octane, Ethane, Methane, Propane
2
NDA General Ability 16 April 2023
MCQ (Single Correct Answer)
+4
-1.33
Which one of the following apparatus is used for separating benzene and water mixture?
A
Round bottom flask
B
Conical flask
C
Separating funnel
D
Dean and Stark apparatus
3
NDA General Ability 16 April 2023
MCQ (Single Correct Answer)
+4
-1.33
An iron nail dipped in copper sulphate solution turns brown. This is due to which one of the following types of reactions?
A
Addition reaction
B
Decomposition reaction
C
Substitution reaction
D
Displacement reaction
4
NDA General Ability 16 April 2023
MCQ (Single Correct Answer)
+4
-1.33
Toothpaste prevents tooth decay by:
A
neutralizing the excess acidity.
B
means of emulsification.
C
the action of fluoride.
D
making a coat of calcium over the teeth surface.
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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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