Physics
Grade-8
Easy
Question
Which of the following processes permits an electric charge to be transferred from one charged object to another?
- Vacuum
- Air
- Insulator
- Conductor
Hint:
Conductor
The correct answer is: Conductor
- A conductor permits an electric charge to be transferred from one charged object to another.
- A conductor conducts electricity.
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A charged plastic rod attracts _____ pieces.
A charged plastic rod attracts _____ pieces.
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There are ____ types of charges that can accumulate on a non-charged body.
There are ____ types of charges that can accumulate on a non-charged body.
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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.
ChemistryGrade-8
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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:
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?
Which of the following apparatus does not use in the process of separation by using a separating funnel?
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Identify the mixture which can be separated by using the fractional distillation:
Identify the mixture which can be separated by using the fractional distillation:
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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
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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?
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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
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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.
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A mixture of two miscible liquids cannot be separated by:
A mixture of two miscible liquids cannot be separated by:
ChemistryGrade-8
