51. Which of the following is not a liquid elements ?

1. 1. Br

   
   
   

   2. Ga

   
   
   

   3. Fr

   
   
   

   4. Ca

   
   
   

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   NA

   Correct Option: D

   NA

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52. The element having lowest melting point in periodic table is

1. 1. Hg

   
   
   

   2. He

   
   
   

   3. W

   
   
   

   4. Cs

   
   
   

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   NA

   Correct Option: B

   NA

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53. Which of the following among alkali metals is most reactive ?

1. 1. Na

   
   
   

   2. K

   
   
   

   3. Rb

   
   
   

   4. Cs

   
   
   

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   NA

   Correct Option: D

   NA

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54. Which of the following ions will from most water soluble hydroxide ?

1. 1. K⁺

   
   
   

   2. Ni⁺⁺

   
   
   

   3. Zn⁺⁺

   
   
   

   4. Al⁺⁺⁺

   
   
   

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   NA

   Correct Option: A

   NA

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55. Which among the following has the highest ionization potential ?

1. 1. Li

   
   
   

   2. B

   
   
   

   3. Ne

   
   
   

   4. F

   
   
   

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   NA

   Correct Option: C

   NA

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