Advertisements
Advertisements
Question
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 ?
Options
evaporation
simple distillation
fractional distillation
crystallisation
Advertisements
Solution
simple distillation
In the mixture of iodine and alcohol, both are miscible. So, distillation process is used to recover both the components.
APPEARS IN
RELATED QUESTIONS
Explain why air is used to inflate tyres.
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
Classify the following into elements and compounds :
- H2O
- He
- Cl2
- CO
- Co
State two physical properties on the basis of which metals can be distinguished from non-metals.
Give reason why graphite is used for making elecrode in a dry cell.
Define a compound. Give two points of evidence to show that sodium chloride is a compound.
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
The property/properties which enable copper metal to be used for making electric wires is/are :
Which of the following statements are true for pure substances ?
- pure substances contain only one kind of particles
- pure substances may be compounds or mixtures
- pure substances have the same composition throughout
- pure substances can be exemplified by all elements other than nickel
In what respects does a true solution differ from a colloidal solution ?
Explain what happens when a beam of light is passed through a colloidal solution.
What is the difference between colloids and suspensions ?
How would you obtain sodium chloride from a mixture of sodium chloride and sulphur without using water ?
Describe the method of separating a mixture containing common salt, sand and ammonium chloride.
Which of the following cannot be separated from air by the process of fractional distillation ?
The given mixture contains three constituents A, B and C. The constituent A is a yellow coloured, solid element which dissolves in a liquid D. The constituent B is a blue coloured salt which is insoluble in liquid D but dissolves easily in another liquid E. The constitudent C is a liquid which is used in cooking food and forms a solid fat on hydrogenation.
(a) What do you think could (i) constituent A, and (ii) liquid D be ?
(b) What could (i) constituent B, and (ii) liquid E be ?
(c) What could liquid C be ?
(d) How will you separate the mixture containing A, B and C ?
Define the term matter.
You want to wear your favourite shirt to a party, but the problem is that it is still wet after a wash. What steps would you take to dry it faster?
Define the term matter.
Define the term matter.
