51. The colourfullness of the sky is due to which of the following reason ?

1. 1. wave length of scattered light

   
   
   

   2. transmission of light

   
   
   

   3. absorption of light by atmospheric gases

   
   
   

   4. None of these

   
   
   

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   NA

   Correct Option: A

   NA

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52. How many layers are adsorbed in chemical adsorption ?

1. 1. Zero

   
   
   

   2. One

   
   
   

   3. Two

   
   
   

   4. Infinite

   
   
   

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   NA

   Correct Option: B

   NA

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53. The adsorption of hydrogen by palladium is called

1. 1. Hydrogenation

   
   
   

   2. Reduction

   
   
   

   3. Hydration

   
   
   

   4. Occlusion

   
   
   

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   NA

   Correct Option: D

   NA

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54. The sky looks blue due to

1. 1. Dispersion effect

   
   
   

   2. Scattering

   
   
   

   3. Reflection

   
   
   

   4. Transmission

   
   
   

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   NA

   Correct Option: B

   NA

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55. Which of the following shows Tyndall effect ?

1. 1. Emulsion

   
   
   

   2. Gel

   
   
   

   3. Sol

   
   
   

   4. Solution

   
   
   

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   NA

   Correct Option: C

   NA

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