11. Which of the following contains both Ionic and Covalent bond ?

1. 1. H²O

   
   
   

   2. NaOH

   
   
   

   3. C⁶H⁶

   
   
   

   4. CO²

   
   
   

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   NA

   Correct Option: B

   NA

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12. NaCI has

1. 1. covalent bond

   
   
   

   2. ionic bond

   
   
   

   3. co-ordinate bond

   
   
   

   4. none

   
   
   

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   NA

   Correct Option: B

   NA

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13. A bond formed by the transfer of electrons between atoms of the elements is called

1. 1. ionic bond

   
   
   

   2. covalent bond

   
   
   

   3. co-ordinate bond

   
   
   

   4. Hydrogen bond

   
   
   

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   NA

   Correct Option: A

   NA

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14. Which has Covalent bond ?

1. 1. Na²S

   
   
   

   2. AICI³

   
   
   

   3. NaH

   
   
   

   4. MgCI²

   
   
   

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   NA

   Correct Option: B

   NA

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15. The number of π- bonds in N² molecule is

1. 1. 1

   
   
   

   2. 2

   
   
   

   3. 3

   
   
   

   4. 4

   
   
   

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   NA

   Correct Option: B

   NA

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