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
Which one of the following statements is correct ?
1
A neutron is formed by combination of an electron and a proton. Therefore, it is neutral
2
The mass of an electron is about 1/2000 times that of a proton
3
An isotope of cobalt is used in the treatment of goiter
4
J. J. Thomson proposed that the nucleus of an atom contains only neutrons
3
NDA General Ability 13 April 2025
MCQ (Single Correct Answer)
+4
-1.33
Change Language
Which one of the following particles in the nucleus of an atom was discovered by J. Chadwick?
1
Electron
2
Proton
3
Positron
4
Neutron
4
NDA General Ability 13 April 2025
MCQ (Single Correct Answer)
+4
-1.33
Change Language
Which one of the following findings is NOT observed in Rutherford's Nuclear Model of Atom?
1
There is a neutral centre in an atom called nucleus
2
Nearly all the mass of an atom resides in the nucleus
3
The electrons revolve around the nucleus in a circular path
4
The size of a nucleus is very small as compared to the size of atom
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