Chemistry
Grade-8
Easy
Question
During the process of steam distillation, the component (residue) left in the flask is:
- Sublime
- Crystals
- volatile
- Non-volatile
Hint:
Steam distillation is a separation process that consists in distilling water together with other volatile and non-volatile components.
The correct answer is: Non-volatile
Steam distillation is a separation process that consists in distilling water together with other volatile and non-volatile components. The steam from the boiling water carries the vapor of the volatiles to a condenser; both are cooled and return to the liquid or solid state, while the non-volatile residues remain behind in the boiling container.
During the process of steam distillation, the component (residue) left in the flask is non volatile.
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The principle of vacuum distillation is based on:
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Identify the incorrect statement/s from the following:
(i) The mixture of glucose and water cannot be separated by using steam distillation.
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Reason (R): Petrol and water are miscible liquids.
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Reason (R): Petrol and water are miscible liquids.
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Methanol and ethanol can be separated by fractional distillation. The boiling points of methanol and ethanol are _____ and _______ respectively:
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(iii). It is the based on principle of repetitive cooling and condensation of vapors.
(iv). This method can also be used to separate those components that have very high boiling points.
Study the following diagram which is the experimental set-up of some separation techniques.
Which of the following statement regarding this experiment is/ are correct?
(i). This method is used to separate the different gases from air.
(ii). It is used to separate the mixture of acetone and water
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Read the following paragraph and fill in the blanks by choosing the correct option.
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When a crude oil(petroleum) is subjected to fractional distillation, The component (i)_______ out last. This component is used for making paints and surfacing roads. The another component which comes out at 40℃ is (ii)______ And is used for fuels in vehicles. The component which distil out at 330℃ is (iii)_____.
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