26. The compressed gas available in cooking gas cylinder is a mixture of

1. 1. C₆H₆ + C₆H₅ CH₃

   
   
   

   2. C₂H₄ + C₂H₂

   
   
   

   3. C₂H₄ + CH₄

   
   
   

   4. C₄H₁₀ + C₃H₈

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   NA

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27. During the evaporation of a liquid

1. 1. the enthalpy decreases

   
   
   

   2. the enthalpy increases

   
   
   

   3. the enthalpy remains unchanged

   
   
   

   4. the internal energy decreases

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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28. Coal gas is mixture os

1. 1. H₂, CH₄, CO

   
   
   

   2. H₂, N₂, CO

   
   
   

   3. H₂, N₂, O₂

   
   
   

   4. H₂, O₂, CO₂

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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29. A gas which burns with blue flame is ?

1. 1. CO

   
   
   

   2. O₂

   
   
   

   3. N₂

   
   
   

   4. CO₂

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   NA

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30. The ratio of γ for inert gases is

1. 1. 1.33

   
   
   

   2. 1.66

   
   
   

   3. 2.13

   
   
   

   4. 1.99

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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