Advertisements
Advertisements
प्रश्न
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 ?
पर्याय
evaporation
simple distillation
fractional distillation
crystallisation
Advertisements
उत्तर
simple distillation
In the mixture of iodine and alcohol, both are miscible. So, distillation process is used to recover both the components.
APPEARS IN
संबंधित प्रश्न
Match the following
| Column A | Column B | ||
| (a) | Molecules | (i) | Water boils |
| (b) | 100° C | (ii) | Evaporation |
| (c) | 0° C | (iii) | Changes from solid to gas |
| (d) | At all temperatures | (iv) | Matter |
| (e) | Camphor | (v) | Water freezes |
Name the terms for the change of a solid into liquid.
Which of the following materials fall in the category of a “pure substance”?
- Ice
- Milk
- Iron
- Hydrochloric Acid
- Calcium oxide
- Mercury
- Brick
- Wood
- Air
What are the conditions for 'something' to be called 'matter'?
Name the scientist who studied the movement of pollen grains suspended in water through a microscope. What is this phenomenon known as?
Name a non-metal which is a good conductor of electricity.
Name one solid, one liquid and one gaseous non-metal.
Name a metal which has no fixed shape.
What is meant by (i) elements (ii) compounds, and (iii) mixtures ?Write down the names of two elements, two compounds and two mixtures.
Explain what happens when a beam of light is passed through a colloidal solution.
Classify the following into solutions, suspensions and colloids :
Soda-water, Milk, Brine, Blood, Ink, Smoke in air, Chalk water mixture, Milk of Magnesia, Shaving cream, Muddy river water.
21.5 g of sodium chloride dissolves in 60 g of water at 25°C. Calculate the solubility of sodium chloride in water at that temperature.
How would you prepare a saturated solution of sodium chloride in water at 25°C ? What will happen if this solution is cooled to 10°C ?
Which one of the following is not a chemical change ?
How will you separate a mixture of common salt, sulphur powder and sand ?
Asmita went to buy an earthen pot. There she saw many things kept for sale.
How did she identify what she needed?
Which of the following are homogeneous in nature?
(i) ice
(ii) wood
(iii) soil
(iv) air
The movement of particles in liquids is ______.
The pressure of gases does not depend on the temperature of the gas and the volume it occupies.
Write a scientific reason.
Lemon sherbat has a sweet, sour and salty taste and it can be poured in a glass.
