Chemistry
Grade-8
Easy
Question
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.
- Only (i) and (ii)
- Only (i) and (iii)
- Only (iii)
- Only (iv)
Hint:
The experimental set up in the diagram shows fractional distillation.
The correct answer is: Only (iv)
The experimental set up in the diagram shows fractional distillation.
Fractional distillation is the separation of a mixture into its component parts, or fractions. Chemical compounds are separated by heating them to a temperature at which one or more fractions of the mixture will vaporize. It uses distillation to fractionate. Generally the component parts have boiling points that differ by less than 25 °C (45 °F) from each other under a pressure of one atmosphere.
This method can also be used to separate those components that have very high boiling points.
Related Questions to study
Chemistry
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)_____.
ChemistryGrade-8
Chemistry
During separation by using separating funnel, the liquid with lower density:
During separation by using separating funnel, the liquid with lower density:
ChemistryGrade-8
Chemistry
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:
ChemistryGrade-8
Chemistry
A mixture of o-nitrophenol and p-nitrophenol can be separated by:
A mixture of o-nitrophenol and p-nitrophenol can be separated by:
ChemistryGrade-8
Chemistry
Which of the following apparatus does not use in the process of separation by using a separating funnel?
Which of the following apparatus does not use in the process of separation by using a separating funnel?
ChemistryGrade-8
Chemistry
Identify the mixture which can be separated by using the fractional distillation:
Identify the mixture which can be separated by using the fractional distillation:
ChemistryGrade-8
Chemistry
The Fractional distillation is always different from the distillation. It is due to the use of which of the following equipment?
The Fractional distillation is always different from the distillation. It is due to the use of which of the following equipment?
ChemistryGrade-8
Chemistry
In the below table the boiling point of a few gases are given. The liquid mixture which contains these all gases are fractionally distilled. What will be the order of gases distilling out?
In the below table the boiling point of a few gases are given. The liquid mixture which contains these all gases are fractionally distilled. What will be the order of gases distilling out?
ChemistryGrade-8
Chemistry
In the process of vacuum distillation the pressure of _______ above the solvent is lowered.
In the process of vacuum distillation the pressure of _______ above the solvent is lowered.
ChemistryGrade-8
Chemistry
During the separation of an immiscible liquid-liquid mixture by using a separating funnel, the following steps are followed. Arrange these steps in proper order.
(1) The nozzle tap is opened gradually and the denser component is allowed to the dropdown.
(2) The liquid-liquid mixture is poured into the separating funnel clamped vertically.
(3) The light component remains in the flask.
(4) The liquid with higher density settles down at the bottom of the flask
(5) The mixture is allowed to stand where clear layers of liquids are formed.
During the separation of an immiscible liquid-liquid mixture by using a separating funnel, the following steps are followed. Arrange these steps in proper order.
(1) The nozzle tap is opened gradually and the denser component is allowed to the dropdown.
(2) The liquid-liquid mixture is poured into the separating funnel clamped vertically.
(3) The light component remains in the flask.
(4) The liquid with higher density settles down at the bottom of the flask
(5) The mixture is allowed to stand where clear layers of liquids are formed.
ChemistryGrade-8
Chemistry
A mixture of two miscible liquids cannot be separated by:
A mixture of two miscible liquids cannot be separated by:
ChemistryGrade-8
Chemistry
The principle of separation of substances by using a separating funnel is based on:
The principle of separation of substances by using a separating funnel is based on:
ChemistryGrade-8
Chemistry
The process of fractional distillation, is carried out by using a special type of instrument which is known as …….
The process of fractional distillation, is carried out by using a special type of instrument which is known as …….
ChemistryGrade-8
Chemistry
Which among the following component is separated by using the principle of steam distillation ?
Which among the following component is separated by using the principle of steam distillation ?
ChemistryGrade-8
Chemistry
Match the entries of Column A with those of Column B.
| Column A |
Column B |
| (a) Fractional distillation |
(i) purification of aniline |
| (b) Steam distillation |
(ii) Purification of glycerine |
| (c) Vacuum distillation |
(iii) Benzene and ether |
| (d) Separating funnel |
(iv) Methanol and ethanol |
Match the entries of Column A with those of Column B.
| Column A |
Column B |
| (a) Fractional distillation |
(i) purification of aniline |
| (b) Steam distillation |
(ii) Purification of glycerine |
| (c) Vacuum distillation |
(iii) Benzene and ether |
| (d) Separating funnel |
(iv) Methanol and ethanol |
ChemistryGrade-8
