General Science · NDA previous year questions

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2020 9 questions

Q652020 · 6 Sept 2020
Neutrons were discovered by
1. A.James Chadwick
2. B.Ernest Rutherford
3. C.J. J. Thomson
4. D.John Dalton
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Answer: A
Q692020 · 6 Sept 2020
Which one of the following terms describes the practice of growing two or more crops simultaneously on the same piece of land ?
1. A.Crop rotation
2. B.Mixed cropping
3. C.Intercropping
4. D.Mixed farming
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Answer: B
Q772020 · 6 Sept 2020
Cartilage is NOT found in
1. A.larynx
2. B.nose
3. C.ear
4. D.urinary bladder
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Answer: D
Q782020 · 6 Sept 2020
Two planets orbit the Sun in circular orbits, with their radius of orbit as $R_{1} = R$ and $R_{2} = 4 R$ . Ratio of their periods $(T_{1} / T_{2})$ around the Sun will be
1. A. $1/16$
2. B. $1/8$
3. C. $1/4$
4. D. $1/2$
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Answer: B
Q812020 · 6 Sept 2020
The part of the human eye on which the image is formed is
1. A.pupil
2. B.cornea
3. C.retina
4. D.iris
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Answer: C
Q852020 · 6 Sept 2020
Which one of the following is NOT a component of human male reproductive system ?
1. A.Cervix
2. B.Urethra
3. C.Seminal vesicle
4. D.Vas deferens
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Answer: A
Q862020 · 6 Sept 2020
Which one of the following is NOT a reason of decrease in biodiversity ?
1. A.Large scale deforestation
2. B.Exploitation of forest produce
3. C.Maintaining sacred groves
4. D.Encroachment in forest areas
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Answer: C
Q902020 · 6 Sept 2020
The Sun appears reddish during sunrise and sunset. The phenomenon in optics which is responsible for this appearance of the Sun is
1. A.Reflection
2. B.Total internal reflection
3. C.Scattering
4. D.Interference
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Answer: C
Q942020 · 6 Sept 2020
Which one of the following is the correct sequence of change in colours when a turmeric stain on white clothes is scrubbed by soap and then washed with water ?
1. A.Yellow – pink – blue
2. B.Yellow – reddish brown – yellow
3. C.Yellow – reddish brown – blue
4. D.Yellow – blue – pink
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Answer: B