6. Which one of the following substance does not have a melting point?

1. 1. bromine

   
   
   

   2. sodium chloride

   
   
   

   3. mercury

   
   
   

   4. glass

   
   
   

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   NA

   Correct Option: D

   NA

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7. How many electrons are there in Na⁺

1. 1. 1

   
   
   

   2. 10

   
   
   

   3. 11

   
   
   

   4. 12

   
   
   

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   NA

   Correct Option: B

   NA

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8. Which of the following is a mixture ?

1. 1. Distilled water

   
   
   

   2. Gasoline

   
   
   

   3. Liquified petroleum

   
   
   

   4. Both (b), (c)

   
   
   

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   NA

   Correct Option: D

   NA

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9. Consider the following elements
   1. Copper
   2. Gold
   3. Platinum
   4. Silver
   Which of the above elements exists free in nature ?

1. 1. 1 and 2

   
   
   

   2. 2 and 3

   
   
   

   3. 1, 2 and 4

   
   
   

   4. 3 and 4

   
   
   

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   NA

   Correct Option: B

   NA

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10. Which one of the following is not an element

1. 1. Oxygen

   
   
   

   2. Hydrogen

   
   
   

   3. Silica

   
   
   

   4. Nitrogen

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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