Advertisements
Advertisements
Question
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
Solution
- 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
RELATED QUESTIONS
Liquids have definite volume but do not have definite shape.
When a crystal of potassium permanganate is placed in a beaker, its purple colour spreads throughout the water. What does this observation tell us about the nature of potassium permanganate and water?
Which of the following is a mixture ?
Salt, Air, Water, Alum, Sugar
What are the three groups into which all the elements can be divided ? Name two elements belonging to each group.
Name a metal which can be easily cut with a knife.
Choose the correct answer.
A 15% alcohol solution means :
Which of the following contains less solute at a given temperature and pressure ? Unsaturated solution or Saturated solution.
Explain what happens when a beam of light is passed through a colloidal solution.
9.72 g of potassium chloride dissolves in 30 g of water at 70°C. Calculate the solubility of potassium chloride at that temperature.
What is the difference between colloids and suspensions ?
What type of magnet is fitted on a crane to separate scrap iron objects from a heap of waste materials in factories ?
Name the source from which nitrogen and oxygen are obtained on a large scale.
Name the process by which common salt is purified.
Name the process by which all the dye can be recovered from black ink.
Fill in the following blanks with suitable words :
A heterogeneous mixture of liquid and solid is conveniently separated by...............
Name the metals that are used in jewellery.
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 |
Liquids cannot be compressed and they have fixed volume.
Define the term matter.
Define the term matter.
