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Learn NDA MCQs with answers [Page 1 of Department 81]

R

Ram Sharma • 178.08K Points
Coach 

2) For a ray of light to suffer total internal reflection it has to pass from

(A) glass to water
(B) air to glass
(C) air to water
(D) water to glass
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Correct Answer - Option (C)

No Explanation found. Add Explanation and get +2 points.

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R

Ram Sharma • 178.08K Points
Coach 

3) A catalyst remains unchanged at the end of the reaction with regard to

(A) Physical state
(B) Chemical composition
(C) Quality
(D) Quantity and chemical composition
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Correct Answer - Option (D)

No Explanation found. Add Explanation and get +2 points.

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R

Ram Sharma • 178.08K Points
Coach 

4) Kinetics is the study of:

(A) How fast the reactions go
(B) The rate of chemical reaction
(C) The mechanisms & paths of the molecules take in joining from one reactant to products
(D) All of these are true
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Correct Answer - Option (D)

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R

Ram Sharma • 178.08K Points
Coach 

5) The substance most commonly used as a food preservative is

(A) sodium salt of benzoic acid
(B) tartaric acid
(C) sodium carbonate
(D) acetic acid
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Correct Answer - Option (A)

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R

Ram Sharma • 178.08K Points
Coach 

7) Ammonial is a mixture of

(A) aluminium powder & ammonium chloride
(B) aluminium powder & ammonium nitrate
(C) aluminium powder & potassium nitrate
(D) aluminium powder & ammonium sulphate
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Correct Answer - Option (B)

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R

Ram Sharma • 178.08K Points
Coach 

8) Of the four locations mentioned below, the highest inside temperature will be attained in the pressure cooker operated with the pressure valve open

(A) In an aeroplane flying at a height of 10,000 m with inside pressure maintained at the sea level
(B) At a place in a valley below sea level
(C) At sea level
(D) At the top of Mt Everest
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Correct Answer - Option (B)

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R

Ram Sharma • 178.08K Points
Coach 

9) A molecule is

(A) The smallest unit of a substance that retains the properties of the substance
(B) A class of organic compounds
(C) The spectrum of a substance
(D) A small mass
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Correct Answer - Option (A)

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R

Ram Sharma • 178.08K Points
Coach 

10) Sodium vapour lamps glow with yellow colour. This is due to

(A) its ability to absorb all other colours except yellow
(B) sublimation of sodium to emit yellow colour
(C) the low ionisation energy of sodium
(D) the emission of excess energy absorbed by sodium atoms, in the yellow region of the spectrum
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Correct Answer - Option (D)

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You are learning MCQ Questions of NDA Department : 81 | Page : 1

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