Random Questions Part -1

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1)   why heavy water used in nuclear reactor

  • [A] Fuel
  • [B] coolant
  • [C] Moderator
  • [D] Speed

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Moderator

2)   Tear gas used by the police contains

  • [A] Ammonia
  • [B] Hydrogen dioxide
  • [C] Flourine
  • [D] Chlorine

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Chlorine

3)   Why water molecule stick to the tree?

  • [A] Adhesion
  • [B] Viscosity
  • [C] Atmospheric Pressure
  • [D] Centrifugal Force

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Adhesion

4)   Why oil in the wick of an Oil Lamp Rises up

  • [A] Gravitational force
  • [B] Refraction
  • [C] Capillary Action
  • [D] Viscosity

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Capillary Action

Capillary Action- when a capillary (a tube of very narrow bore) dipped in liquid it is found that inside capillary level of liquid either rise or fall relative to the surrounding level of liquid. three ways of rise and fall a) Cohesion  (water Stick to itself by Hydrogen Bonding . also create Surface tension so this why insects stay on the surface of water without falling inside)    B) Adhesion-- Water stick to other things like water stick on wall or door. Cohesion + Adhesion water up the roots.

5)   X-rays lies between

  • [A] Infra red and Microwave
  • [B] Gamma and Ultravoilet
  • [C] Visible and Infrared
  • [D] None of the Above

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Gamma and Ultravoilet

(Increase in Wavelength Gamma to Radio ) ---->>>>
G--- Gamma  X--Xrays   U-- Ultravoilet    I--- Infrared  M----Microwave  R--Radio
                                                                            (<--- Increase in frequency Radio to Gamma Rays)

6)   The Temperature which has same reading on both Fahrenheit and Celsius scale is

  • [A] 100
  • [B] -100
  • [C] 40
  • [D] -40

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-40

7)   Who defined the law of gravitation?

  • [A] Faraday
  • [B] Galileo
  • [C] Newton
  • [D] Tesla

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Newton

8)   Which color of lights shows minimum deviation when passed through prism?

  • [A] Violet
  • [B] Red
  • [C] Blue
  • [D] Green

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Red
Red shows minimum deviation
 
Violet shows maximum deviation
 
Always remember this series ( G X U V I M R ) in order
 
(Increase in Wavelength Gamma to Radio ) --->>
 
G--- Gamma  X--Xrays   U-- Ultravoilet    I--- Infrared  M----Microwave  R--Radio 
                                                                                                                                         (<--- Increase in frequency Radio to Gamma Rays)

9)   Ball pen functions on the principle of

  • [A] Absorption
  • [B] Gravitational force
  • [C] Surface tension
  • [D] Capillary Action

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Surface tension

10)   A man cannot see clearly beyond 10 meters. The disease he suffers from

  • [A] Myopia
  • [B] Hypermetropia
  • [C] Cataract
  • [D] Long sightedness

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Myopia
 
Myopia  (M)  -- Near objects (N). we can keep this mind in exam. M and N. 
 
Myopia: In myopia , it's  difficult to see a distant object. Also known as short sightedness or near sightedness. 
 
Hypermetropia:  difficult to see a nearby object.  Also known as long sightedness. 
 
Cataract: The cornea becomes cloudy in a cataract  thus the person cannot see clearly. 

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