General Science · NDA previous year questions

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2017 11 questions

Q522017 · 10 Sept 2017
If some object is weighed when submerged in water, what will happen to its weight compared to its weight in air?
1. A.Increase
2. B.Decrease
3. C.Remain exactly the same
4. D.Increase or decrease cannot be predicted
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Answer: B
Q642017 · 10 Sept 2017
The symbol of SI unit of inductance is H. It stands for
1. A.Holm
2. B.Halogen
3. C.Henry
4. D.Hertz
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Answer: C
Q652017 · 10 Sept 2017
In a vacuum, a five-rupee coin, a feather of a sparrow bird and a mango are dropped simultaneously from the same height. The time taken by them to reach the bottom is $t_{1}$ , $t_{2}$ and $t_{3}$ respectively. In this situation, we will observe that
1. A. $t_{1} > t_{2} > t_{3}$
2. B. $t_{1} > t_{3} > t_{2}$
3. C. $t_{3} > t_{1} > t_{2}$
4. D. $t_{1} = t_{2} = t_{3}$
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Answer: D
Q682017 · 10 Sept 2017
Radioactivity is measured by
1. A.GM Counter
2. B.Polarimeter
3. C.Calorimeter
4. D.Colorimeter
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Answer: A
Q812017 · 10 Sept 2017
Why is potassium permanganate used for purifying drinking water?
1. A.It kills germs
2. B.It dissolves the impurities
3. C.It is a reducing agent
4. D.It is an oxidizing agent
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Answer: D
Q862017 · 10 Sept 2017
When pure water boils vigorously, the bubbles that rise to the surface are composed primarily of
1. A.air
2. B.hydrogen
3. C.hydrogen and oxygen
4. D.water vapour
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Answer: D
Q522017 · 23 Apr 2017
An optical illusion which occurs mainly in deserts during hot summer is based on the principle of
1. A.Reflection
2. B.Interference
3. C.Dispersion
4. D.Total internal reflection
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Answer: D
Q592017 · 23 Apr 2017
Which one of the following statements is correct about the magnification of an optical microscope ?
1. A.Magnification increases with the increase in focal length of eyepiece
2. B.Magnification increases with the increase in focal length of objective
3. C.Magnification does not depend upon the focal length of eyepiece
4. D.Magnification decreases with the increase in focal length of eyepiece
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Answer: D
Q672017 · 23 Apr 2017
A Kelvin thermometer and a Fahrenheit thermometer both give the same reading for a certain sample. What would be the corresponding reading in a Celsius thermometer?
1. A.574
2. B.301
3. C.273
4. D.232
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Answer: B
Q762017 · 23 Apr 2017
Glass is a
1. A.liquid
2. B.colloid
3. C.non-crystalline amorphous solid
4. D.crystalline solid
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Answer: C
Q942017 · 23 Apr 2017
Sugarcane is one of the important cash crops in India. It is grown to obtain
1. A.Starch
2. B.Glucose
3. C.Fructose
4. D.Sucrose
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Answer: D