Chemistry
Grade-8
Easy
Question
The principle of vacuum distillation is based on:
- Heat the components
- Cool the components
- To collect the components
- To store the components
Hint:
Distillation performed under reduced pressure, which allows the purification of compounds not readily distilled at ambient pressures.
The correct answer is: Cool the components
Vacuum distillation is distillation performed under reduced pressure, which allows the purification of compounds not readily distilled at ambient pressures or simply to save time or energy. This technique separates compounds based on differences in their boiling points. This technique is used when the boiling point of the desired compound is difficult to achieve or will cause the compound to decompose.
The principle of vacuum distillation is based on cool the components.
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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.
(ii) Fractional distillation can be used to purify the organic compounds.
(iii) Separating funnel is useful for separating the mixture of salt and water.
Identify the incorrect statement/s from the following:
(i) The mixture of glucose and water cannot be separated by using steam distillation.
(ii) Fractional distillation can be used to purify the organic compounds.
(iii) Separating funnel is useful for separating the mixture of salt and water.
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Assertion (A): A mixture of petrol and water can be separated by using a separating funnel.
Reason (R): Petrol and water are miscible liquids.
Assertion (A): A mixture of petrol and water can be separated by using a separating funnel.
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:
Methanol and ethanol can be separated by fractional distillation. The boiling points of methanol and ethanol are _____ and _______ respectively:
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Which of the following pair of components are not obtained during the fractional distillation of petroleum?
Which of the following pair of components are not obtained during the fractional distillation of petroleum?
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In the Vacuum distillation process:
In the Vacuum distillation process:
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A simple fractionating column is a tube packed with glass beads, the purpose of glass beads is:
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Fractional distillation can be used to separate the component of a mixture whose boiling point is:
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__________ is a process that can be used to obtain a volatile organic substance is:
__________ is a process that can be used to obtain a volatile organic substance is:
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In the vacuum distillation process, the boiling point of component of liquid which is to be distil out becomes:
In the vacuum distillation process, the boiling point of component of liquid which is to be distil out becomes:
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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
(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
(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.
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Read the following paragraph and fill in the blanks by choosing the correct option.
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)_____.
Read the following paragraph and fill in the blanks by choosing the correct option.
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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During separation by using separating funnel, the liquid with lower density:
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Identify the technique of separation which is used for the separation of two liquids shown in following picture:
Identify the technique of separation which is used for the separation of two liquids shown in following picture:
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A mixture of o-nitrophenol and p-nitrophenol can be separated by:
A mixture of o-nitrophenol and p-nitrophenol can be separated by:
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Which of the following apparatus does not use in the process of separation by using a separating funnel?
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ChemistryGrade-8
