Advertisements
Advertisements
प्रश्न
The liquid air has three components X, Y and Z whose boiling points are : –186°C, –183°C and –196°C,
respectively. When liquid air is fed into a tall fractional distillation column from near its bottom and warmed
up slowly :
(a) Which component will be collected from near the bottom of the fraction distillation column ? Why ?
(b) Which component will be collected from the top part of the fractional distillation column ? Why ?
(c) Which component will be collected from the middle part of the fractional distillation column ? Why ?
(d) What could the component X, Y and Z be ?
Advertisements
उत्तर
- Y will be collected from the area near the bottom of the fractional distillation column because it has highest boiling point (−183°C).
- Z will be collected from the top part of the fractional distillation column because it has lowest boiling point (−196°C).
- X will be collected from the middle part of the fractional distillation column because it has a boiling point −186°C, which is lower than that of Y but higher than that of Z.
- X is liquid argon, Y is liquid oxygen, and Z is liquid nitrogen.
APPEARS IN
संबंधित प्रश्न
Name the processes involved in two cases.
Name the scientist who studied the movement of pollen grains suspended in water through a microscope. What is this phenomenon known as?
Explain why, osmosis can be considered to be a special kind of diffusion. Classify the following into
(i) osmosis, and (ii) diffusion :
- swelling up of a raisin on keeping in water
- spreading of virus on sneezing
- earthworm dying on coming in contact with common salt
- shrinking of grapes kept in thick sugar syrup
- preserving of pickles in salt
- spreading of smell of cake being baked in the kitchen
- aquatic animals using oxygen dissolved in water during respiration
State any two properties for believing that aluminium is a metal.
Give reason why copper metal is used for making electric wires.
How would you confirm that a colourless liquid given to your is pure water ?
Name a metal which forms amalgams.
Which of the two will scatter light : soap solution or sugar solution ? Why ?
Choose the correct answer.
A 15% alcohol solution means :
How will you differentiate between a suspension and a colloid ?
Define solubility of a substance. How does it vary with temperature ?
Name the process which can be used to purify an impure sample of copper sulphate.
Fill in the following blanks with suitable words :
A mixture of kerosene and petrol can be separated by .....................
Fill in the following blanks with suitable words :
The gases of air can be separated by fractional distillation of liquid air because they have different..............
How will you separate a mixture of common salt, sulphur powder and sand ?
With the help of a labelled diagram, describe the method of separating ammonium chloride from a mixture of ammonium chloride and common salt. Mention the difference in the properties of ammonium chloride and sodium chloride which has made this separation possible.
Asmita went to buy an earthen pot. There she saw many things kept for sale.
What is the difference between a substance and an object?
All the matter made of ______.
Match the physical quantities given in column A to their S I units given in column B:
| (A) | (B) | ||
| (a) | Pressure | (i) | cubic metre |
| (b) | Temperature | (ii) | kilogram |
| (c) | Density | (iii) | pascal |
| (d) | Mass | (iv) | kelvin |
| (e) | Volume | (v) | kilogram per cubic metre |
Gas-solid is ______.
