Which of the following were called permanent gases ? (i) `H_(2)` , (ii) `O_(2)` (iii) `N_(2)` , (iv) `CH_(4)`A. `(i),(ii),(iii)`B. `(i),(ii),(iii),(iv)`C. `(ii),(iii),(iv)`D. `(i),(ii)`

Which of the following were called permanent gases ? (i) `H_(2)` , (ii

1.	Which of the following were called permanent gases ? (i) `H_(2)` , (ii) `O_(2)` (iii) `N_(2)` , (iv) `CH_(4)`A. `(i),(ii),(iii)`B. `(i),(ii),(iii),(iv)`C. `(ii),(iii),(iv)`D. `(i),(ii)`
Answer» Correct Answer - B They were called permanent gases as they could not be liquefied at room temperature by applying any amount of pressure. The reason for th efailure to liqefy the so-called permanent gases is now clear: They had not been cooled sufficiently before applying pressure.

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The gases obey the different gas laws only theoretically. Practically all of them show some deviation from these laws. These are called real gases. The deviation are maximum under high pressyre and at low temperature. These are comparatively small when the conditions are reversed. It has been found that the easily liquefiable gases show more deviations from the ideal gas beheviour as compared to the gases which are liqufied with diffculty. Gas deviates from ideal gas beheviour because moleculesA. are coloulessB. attract each otherC. contain covalent bondD. show Brownian Movement.
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Match the following gas laws with the equation representing them.
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The behaviour of ideal gas is goverened by various gas laws which are described by mathematical statements as given below: (`i`) `PV=k` (constant) at constant `n` and `T` (`ii`) `V//T=k_(2)` (constant) at constant `n` and `P` (`iii`) `V//n=k_(3)` (constant) at constant `T` and `P` (`iv`) `PV=nRT` (`v`) `P//T=k_(4) (constant) at constant `n` and `V` Answer the following The value of `k_(2)` isA. Independent of nature and amount of gasB. Depends on temperature and pressure conditionsC. Depends on pressure and amount of gasD. Depends only on nature of gas
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Which of the following were called permanent gases ? (i) `H_(2)` , (ii) `O_(2)` (iii) `N_(2)` , (iv) `CH_(4)`A. `(i),(ii),(iii)`B. `(i),(ii),(iii),(iv)`C. `(ii),(iii),(iv)`D. `(i),(ii)`

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