General Science · NDA previous year questions

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2019 17 questions

Q602019 · 17 Nov 2019
A student measures certain lengths using a meter scale having least count equal to 1 mm. Which one of the following measurements is more precise?
1. A.0.50 mm
2. B.29.07 cm
3. C.0.925 m
4. D.910 mm
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Answer: C
Q652019 · 17 Nov 2019
Soaps clean surfaces on the principle based on
1. A.Viscosity
2. B.Floatation
3. C.Elasticity
4. D.Surface tension
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Answer: D
Q782019 · 17 Nov 2019
Which one of the following statements about glass is not correct?
1. A.Glass is often said to be a supercooled liquid.
2. B.Glass has no definite melting point.
3. C.Soda glass is harder than pyrex glass.
4. D.Boron is present in pyrex glass.
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Answer: C
Q792019 · 17 Nov 2019
Which one of the following statements is correct?
1. A.Both boiling and evaporation are surface phenomena.
2. B.Boiling is a surface phenomenon, but evaporation is a bulk phenomenon.
3. C.Both boiling and evaporation are bulk phenomena.
4. D.Boiling is a bulk phenomenon, but evaporation is a surface phenomenon.
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Answer: D
Q832019 · 17 Nov 2019
A sample of ‘soft soap’ contains
1. A.Caesium
2. B.Potassium
3. C.Calcium
4. D.Magnesium
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Answer: B
Q852019 · 17 Nov 2019
Which one of the following substances is not a mixture?
1. A.Tin
2. B.Sea water
3. C.Soil
4. D.Air
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Answer: A
Q872019 · 17 Nov 2019
Net movement of water from a dilute to a concentrated solution through a selectively permeable membrane is called
1. A.Diffusion
2. B.Dispersion
3. C.Osmosis
4. D.Absorption
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Answer: C
Q952019 · 17 Nov 2019
Who among the following popularized the use of embryological characters in taxonomy?
1. A.Carl Linnaeus
2. B.Panchanan Maheshwari
3. C.Birbal Sahni
4. D.Bentham and Hooker
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Answer: B
Q682019 · 21 Apr 2019
The formula for conversion between Fahrenheit and Celsius is °F=X+(1.8×°C) What is factor X?
1. A.32
2. B.22
3. C.98
4. D.42
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Answer: A
Q712019 · 21 Apr 2019
A fuse wire must be
1. A.conducting and of low melting point
2. B.conducting and of high melting point
3. C.insulator and of high melting point
4. D.insulator and of low melting point
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Answer: A
Q742019 · 21 Apr 2019
Which one of the following is NOT a synthetic detergent?
1. A. $C H_{3} (C H_{2})_{10} C H_{2} OS O_{3}^{-} N a^{+}$
2. B. $[C H_{3} (C H_{2})_{15} - N - (C H_{3})_{3}]^{+} B r^{-}$
3. C. $C H_{3} (C H_{2})_{16} CO O^{-} N a^{+}$
4. D. $C H_{3} (C H_{2})_{16} COO (C H_{2} C H_{2} O)_{n} C H_{2} C H_{2} OH$
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Answer: C
Q752019 · 21 Apr 2019
Which one of the following is an example of a clean fuel?
1. A.Coke
2. B.Propane
3. C.Petrol
4. D.Wax
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Answer: B
Q792019 · 21 Apr 2019
Basic scientific principle behind a nuclear reactor is
1. A.Nuclear fusion
2. B.Controlled nuclear fusion
3. C.Uncontrolled nuclear fission
4. D.Controlled nuclear fission
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Answer: D
Q802019 · 21 Apr 2019
Which one of the following could be the melting point of iron?
1. A.25°C
2. B.37°C
3. C.500°C
4. D.1500°C
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Answer: D
Q872019 · 21 Apr 2019
Which one of the following substances is NOT a mixture ?
1. A.Ice
2. B.Ice-cream
3. C.Air
4. D.Honey
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Answer: A
Q942019 · 21 Apr 2019
As per the code of the nomenclature, which one of the following is the correct way of writing a biological name?
1. A. $Amoeba Proteus$
2. B. $Amoeba proteus$
3. C. $amoeba proteus$
4. D. $\underline{Amoeba} \underline{Proteus}$
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Answer: B
Q992019 · 21 Apr 2019
The Sun is seen little before it rises and for a short while after it sets. This is because of
1. A.total internal reflection
2. B.atmospheric refraction
3. C.apparent shift in the direction of Sun
4. D.dispersion
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Answer: B