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प्रश्न
The dyes present in fountain pen ink can be separated by the technique of :
विकल्प
fractional distillation
infrared photography
crystallisation
chromatography
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उत्तर
chromatography
Chromatography is the technique used to separate the contents of a mixture, where solute particles are in extremely small quantity.
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संबंधित प्रश्न
Define matter.
Write true or false for each statement. Rewrite the false statement correctly.
Matter cannot exist in different states.
Name two processes which provide the best evidence for the motion of particles in matter.
What is meant by saying that metals are malleable and ductile?
Which of the following are not compounds ?
Chlorine gas, Potassium chloride, Iron powder, Iron sulphide, Aluminium foil, Iodine vapour, Graphite, Carbon monoxide, Sulphur powder, Diamond
Which of the following does not have a fixed melting point/boiling point ?
Out of a colloid, solution and a suspension :
which one has the smallest particles ?
Define solute.
How will you test whether a given solution is a colloidal solution ?
One of the following is a solid foam. This one is :
Tincture of iodine has antiseptic properties. This solution is made by dissolving :
100 mL of water at room temperature of 25°C is taken in a beaker and a little of solid S is dissolved in it by stirring to obtain a solution X. More and more of solid S is added to the solution with constant stirring, while keeping the temperature of solution constant at 30°C. After some time it is observed that no more solid dissolves in water and at the same time some solid is also left undissolved at the bottom of the beaker.
- The contents of beaker are filtered through a filter paper to obtain solution Y in the form of a filtrate.
- What name is given to solutions like X ?
- What name is given to solutions like Y ?
- What will you observe if the solution Y at 30°C is cooled down to 10°C by keeping the beaker in crushed ice ? Why ?
- What term is used to denote the amount of solid dissolved in 100 grams of water in a solution lie Y ?
How would you separate iodine from a mixture of iodine and common salt ?
The material which is added to water during purification process at the water works so as to disinfect it is :
You are given a mixture of iodine in alcohol called tincture iodine. Which method will you use to recover both, iodine as well as alcohol, from this mixture ?
Higher the temperature, the higher the kinetic energy of particles.
Define the term matter.
Define the term matter.
