1
NDA General Ability 13 April 2025
MCQ (Single Correct Answer)
+4
-1.33
Change Language
Which one of the following statements is NOT correct ?
1
The molecules of soap are sodium or potassium salts of long chain fatty acids
2
The molecules of soap contain both hydrophobic and hydrophilic ends
3
Detergents are more effective than soaps in hard water
4
In micelles the ionic-end of the molecules is towards oil droplet while the other end faces outside
2
NDA General Ability 13 April 2025
MCQ (Single Correct Answer)
+4
-1.33
Change Language
Element X forms a chloride with the formula XCl₂, which is a solid with high melting point. X would most likely be in the same group of periodic table as
1
Na
2
Al
3
Mg
4
K
3
NDA General Ability 13 April 2025
MCQ (Single Correct Answer)
+4
-1.33
Change Language
Which one of the following oxides is a neutral oxide?
1
CO
2
CO₂
3
Na₂O
4
 MgO
4
NDA General Ability 13 April 2025
MCQ (Single Correct Answer)
+4
-1.33
Change Language
Which one of the following is also known as Dry ice in its solid form?
1
SiO₂
2
CO₂
3
CaO
4
MgO
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