1
NDA General Ability 1st September 2024
MCQ (Single Correct Answer)
+4
-1.33
Change Language
Which one among the following is an example of chemical change?
1
Sublimation of camphor
2
Melting of ice
3
Heating of an iron rod
4
Mixing of NaOH and HCI
2
NDA General Ability 1st September 2024
MCQ (Single Correct Answer)
+4
-1.33
Change Language
Which one among the following is the correct focal length of a combination of lenses of power 2.5 D and -2.0 D?
1
+0.5 m
2
-0.5 m
3
+2.0 m
4
-2.0 m
3
NDA General Ability 1st September 2024
MCQ (Single Correct Answer)
+4
-1.33
Change Language
The AC mains domestic supply current in India changes direction in every 
1
50 s
2
$\frac{1}{50}$ s
3
100 s
4
$\frac{1}{100}$ s
4
NDA General Ability 1st September 2024
MCQ (Single Correct Answer)
+4
-1.33
Change Language
A block of mass 20 kg slides on a rough horizontal plane surface. Let the speed of the block at a particular instant is 10 m/s. It comes to rest after travelling a distance of 20 m. Which one of the following could be the magnitude of the frictional force?
1
10 N
2
20 N
3
40 N
4
50 N
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