86. Crown ethers are

1. 1. Cyclic ethers

   
   
   

   2. Ethers with several other functional groups

   
   
   

   3. Mixed groups

   
   
   

   4. Not ethers

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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87. The formula of propanenitrile is

1. 1. CH₃CN

   
   
   

   2. C₂H₅CN

   
   
   

   3. C₃H₇CN

   
   
   

   4. C₂H₅NC

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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88. The thermal decomposition of alkanes is known as

1. 1. Creacking

   
   
   

   2. Isomerisation

   
   
   

   3. Dehydration

   
   
   

   4. Reforming

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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89. Methylated spirit is

1. 1. 100% alcohol

   
   
   

   2. 95.6% alcohol + 4.4% water

   
   
   

   3. 90% alcohol + 9% methanol + pyridine, etc.

   
   
   

   4. Power alcohol

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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90. Octane number of a fuel can be increased by

1. 1. Isomerisation

   
   
   

   2. Alkylation

   
   
   

   3. Reforming

   
   
   

   4. All of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   NA

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