56. Alkali metals in each period have

1. 1. Lowest IE

   
   
   

   2. Highest IE

   
   
   

   3. High electro-negativity

   
   
   

   4. None of these

   
   
   

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   NA

   Correct Option: A

   NA

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57. Steel differs from pig iron and wrought iron that it contains

1. 1. Less carbon

   
   
   

   2. More carbon

   
   
   

   3. Amount of carbon intermediate between these tow

   
   
   

   4. No carbon at all

   
   
   

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   NA

   Correct Option: C

   NA

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58. When sodium bicarbonate is heated the product obtained is

1. 1. Na

   
   
   

   2. NaCO₃

   
   
   

   3. NaHCO₃

   
   
   

   4. Na₂OC₃

   
   
   

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   NA

   Correct Option: D

   NA

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59. The colour of iodine solution is discharged by shaking it with aqueous solution of

1. 1. sodium sulphate

   
   
   

   2. sodium sulphite

   
   
   

   3. sodium thiosulphate

   
   
   

   4. sulphuric acid

   
   
   

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   NA

   Correct Option: C

   NA

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60. The process of sudden cooling is known as

1. 1. annealing

   
   
   

   2. diffusion

   
   
   

   3. quencing

   
   
   

   4. sedimentation

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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