Advertisements
Advertisements
प्रश्न
Seema visited a Natural Gas Compressing Unit and found that the gas can be liquefied under specific conditions of temperature and pressure. While sharing her experience with friends she got confused. Help her to identify the correct set of conditions
पर्याय
Low temperature, low pressure
High temperature, low pressure
Low temperature, high pressure
High temperature, high pressure
Advertisements
उत्तर
Low temperature, high pressure
Evaporation, diffusion, and expansion of gases increase on raising the temperature. The evaporation rate increases because on increasing temperature, the kinetic energy of molecules increases, so the molecules present at the surface of the liquid leave the surface quickly and go into the vapour state. Diffusion and expansion of gases also increase as the molecules move more rapidly and try to occupy more space.
APPEARS IN
संबंधित प्रश्न
Select the correct alternative
The molecules can move freely anywhere in
- gases
- liquids
- solids
- none of the above
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?
Describe in your own words, what happens to the particles when salt dissolves in water.
Bromine and air take about 15 minutes to diffuse completely but bromine diffuses into a vacuum very rapidly. Why is this so?
What are the three groups into which all the elements can be divided ? Name two elements belonging to each group.
State one property in which a solution of sugar in water resembles a mixture of sugar and sand, and one property in which it differs from it.
What are the three general classes of matter ? Give one example of each type.
Which one of the following is not a metalloid ?
Choose the correct answer.
A 5 per cent sugar solution means that :
Define solvent.
Tincture of iodine has antiseptic properties. This solution is made by dissolving :
Write a method to separate a mixture of sand and potash alum.
Describe a method to separate a mixture of camphor and sand.
The best way to recover sugar from an aqueous sugar solution is :
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 ?
Select the correct answer from A, B, C, D & E for the statement given below:
An atom or group of atoms _________ having a resultant charge.
Justify your answer.
| Figure 1 | Figure 2 | Figure 3 |
 |
 |
 |
The arrangement of particles in three different phases of matter is shown above.
- Which state is represented by Fig. 1?
- In which state will the inter-particle attraction be maximum?
- Which one of them cannot be contained in an open vessel?
- Which one can take the shape of its container?
All the matter made of ______.
Liquids cannot be compressed and they have fixed volume.
Higher the temperature, the higher the kinetic energy of particles.
