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प्रश्न
A liquid which decomposes at its boiling point can be purified by ______.
विकल्प
distillation at atmospheric pressure
distillation under reduced pressure
fractional distillation
steam distillation
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उत्तर
A liquid which decomposes at its boiling point can be purified by distillation under reduced pressure.
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संबंधित प्रश्न
Ortho and para – nitro phenol can be separated by ______.
Assertion: \[\begin{array}{cc}
\ce{CH - C = CH - COOH}\\|\phantom{.}\\
\phantom{........}\ce{COOC2H5}\end{array}\]
Reason: The principal functional group gets lowest number followed by double bond (or) triple bond.
Give a brief description of the principles of Fractional distillation.
Explain paper chromatography.
The fragrance of flowers is due to the presence of some steam volatile organic compounds called essential oils. These are generally insoluble in water at room temperature but are miscible with water vapour in vapour phase. A suitable method for the extraction of these oils from the flowers is ______.
If a liquid compound decomposes at its boiling point, which method (s) can you choose for its purification. It is known that the compound is stable at low pressure, steam volatile and insoluble in water.
By mistake, an alcohol (boiling point 97°C) was mixed with a hydrocarbon (boiling point 68°C). Suggest a suitable method to separate the two compounds. Explain the reason for your choice.
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Reason (R): The coloured components of inks migrate at different rates because paper selectively retains different components according to the difference in their partition between the two phases.
A liquid compound (x) can be purified by steam distillation only if it is ______.
Which statement best explains why organic compounds must be purified?
