The critical temperature of a gas is the temperature:
A. Below which it cannot be liquefied by pressure alone.
B. At which its volume becomes zero.
C. Above which it cannot be liquefied by pressure alone.
D. At which it solidifies.
Answer: Option C
Solution (By JKSSB Mock Tests)
The critical temperature (Tc) is the temperature above which a gas cannot be liquefied, regardless of how much pressure is applied. Above Tc, the kinetic energy of the molecules is too high for intermolecular forces to hold them together in a liquid state, even under extreme pressure.
Explanation:
Hydrogenation is the addition of hydrogen to unsaturated compounds (like alkenes or alkynes) in the presence of a catalyst (like Ni, Pd, or Pt) to form saturated compounds (alkanes). For example, ethene + H₂ → ethane. This process is widely used in the food industry to solidify vegetable oils.
Explanation:
Synthetic detergents are primarily sodium salts of long-chain alkyl benzene sulphonic acids or alkyl hydrogen sulphates. Unlike soaps (which are carboxylate salts), detergents do not form insoluble precipitates with calcium and magnesium ions in hard water, making them effective cleansers.
Explanation:
Biogas, commonly known as gobar gas in India, is produced by the anaerobic digestion of organic waste (like cattle dung) by methanogenic bacteria. The primary component of biogas is methane (CH4), which typically makes up 50-75% of the gas mixture, along with carbon dioxide and trace gases.
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