Advertisements
Advertisements
प्रश्न
Tincture of iodine is a mixture of two materials X and Y. The material Y has a property that its solid form can be converted directly into vapours on heating by a process called Z.
- What could X be ?
- What could Y be ?
- Name the process Z.
- Which process would you use to recover both the components X and Y from tincture of iodine ?
- Which process can be used to recover only component Y from tincture of iodine ?
Advertisements
उत्तर
- Tincture iodine is a mixture of two materials X and Y. So, X is alcohol.
- The material Y has a property and its solid form can be converted directly into vapours on heating by the process called Z. So, Y is iodine.
- Process Z is called sublimation.
- Process used to recover both the components, i.e., alcohol and iodine, from the tincture of iodine is distillation.
- The process used to recover component Y only from the tincture of iodine is evaporation.
APPEARS IN
संबंधित प्रश्न
Intermolecular space is maximum in .......... less in ............ and the least in .........
Name the terms for the change of vapour into a liquid.
What are molecules ?
Out of solids, liquids and gases, which one has :
- maximum movement of particles ?
- maximum interparticle attractions ?
- minimum spaces between particles ?
Which of the following substances are elements ?
Water, Salt, Mercury, Iron, Marble, Diamond, Wood, Nitrogen, Air, Graphite, Hydrogen, Oxygen, Sugar, Chlorine
Give reason why copper metal is used for making electric wires.
Define a compound. Give two points of evidence to show that sodium chloride is a compound.
Draw a flow-chart for the schematic representation of different types of matter.
Define solute.
How will you differentiate between a suspension and a colloid ?
Name the different types of solutions. Give one example of each.
Define Foam Give one example.
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.
Which of the following are chemical changes and which physical ? Give reason.
- a glass bottle breaking
- coal burning in air
- making a cake
- wool being knitted into a sweater
Tincture of iodine has antiseptic properties. This solution is made by dissolving :
Which technique is used in a washing machine to squeeze out water from wet clothes while drying ?
How will you separate water from mustard oil ?
The best way to recover sugar from an aqueous sugar solution is :
The non S I and S I units of some physical quantities are given in column A and column B respectively. Match the units belonging to the same physical quantity:
| (A) | (B) | ||
| (a) | degree celsius | (i) | kilogram |
| (b) | centimetre | (ii) | pascal |
| (c) | gram per centimetre cube | (iii) | metre |
| (d) | bar | (iv) | kelvin |
| (e) | milligram | (v) | kilogram per metre cube |
Boiling refers to the process by which a substance changes from the liquid to the gaseous state at its ______ point.
