Advertisements
Advertisements
Question
Which of the following cannot be separated from air by the process of fractional distillation ?
Options
oxygen
argon
hydrogen
nitrogen
Advertisements
Solution
hydrogen
Hydrogen cannot be separated from the mixture of air as it is not present in free state. The three major components of air are nitrogen, oxygen and argon. These are separated using fractional distillation.
APPEARS IN
RELATED QUESTIONS
Select the correct alternative
The molecules can move freely anywhere in
- gases
- liquids
- solids
- none of the above
Define the term matter. What is it composed of?
Define the following term of Atom .
When a gas jar containing air is inverted over a gas jar containing bromine vapour, the red-brown bromine vapour diffuse into air. Explain how bromine vapour diffuse into air.
Name the property which enables metals to be drawn into wires.
What is the other name for impure substances ? Give two examples of impure substances.
What are the three groups into which all the elements can be divided ? Name two elements belonging to each group.
Draw a flow-chart for the schematic representation of different types of matter.
Iron powder and sulphur powder were mixed together and divided into two parts A and B. When part A was heated strongly over a burner, then a substance C was formed. The part B was, however, not heated at all. When dilute hydrochloric acid was added to substance C, then gas D was evolved and when dilute hydrochloric acid was added to part B then gas E was evolved.
- What type of substance is B ?
- What type of substance is C ?
- Name the gas (i) D, and (ii) E ?
- State one characteristic property of gas D.
- Write one test to identify gas E.
Out of a colloid, solution and a suspension :
which one has the largest particles ?
State whether the following statement is true or false :
Bread is an example of solid foam.
Define Aerosol Give one example.
What is the difference between colloids and suspensions ?
When the solid A is added to water, it dissolves with the evolution of a lot of heat and making little explosions to form two products B and C. The properties of products B and C are entirely different from those of solid A as well as water. Moreover, products B and C cannot be reconverted into solid A and water. When another solid D is added to water, it dissolves with the absorption of a little heat to form a product E which cools down. The product E shows the properties of both, solid D as well as water. Moreover, product E can be converted into solid D and water.
(a) What type of change occurs when solid A is dissolved in water ? Why ?
(b) What type of change occurs when solid D is dissolved in water ? Why ?
(c) Name a metal which you think could behave like solid A. Also name the products B and C.
(d) Name the solid D if it is the one which is used in making ordinary dry cells.
(e) Name the process by which D can be recovered from E.
How will you separate iron pins from sand ?
Draw a labelled diagram of the fractional distillation apparatus used for separating a mixture of alcohol and water.
Diffentiate between absorption and adsorption.
Higher the temperature, the higher the kinetic energy of particles.
The pressure of gases does not depend on the temperature of the gas and the volume it occupies.
Define the term matter.
