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
The inter-molecular space is maximum in
Which one is a kind of matter:
When extremely small particles X derived from the anther of a flower were suspended in a liquid Y and observed through a microscope, it was found that the particles X were moving throughout the liquid Y in a very zig-zag way. It was also observed that warmer the liquid Y, faster the particles X moved on its surface.
- What could particles X be ?
- What do you think liquid Y is ?
- What is the zig-zag movement of X known as ?
- What is causing the zig-zag movement of particles X ?
- Name the scientist who discovered this phenomenon.
- What does this experiment tell us about the nature of liquid Y?
Which of the following substances are elements ?
Water, Salt, Mercury, Iron, Marble, Diamond, Wood, Nitrogen, Air, Graphite, Hydrogen, Oxygen, Sugar, Chlorine
Name a metal which can be easily cut with a knife.
Name a metal which forms amalgams.
What is the name of the clear liquid formed when a solid dissolves in a liquid ?
Choose the correct answer.
A 5 per cent sugar solution means that :
How will you differentiate between a suspension and a colloid ?
Differentiate between a saturated and an unsaturated solution. How will you test whether a given solution is saturated or not ?
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 ?
One of the following liquids will leave behind a residue on heating. This one is :
Which technique can be used to detect and identify traces of poison present in the stomach wash of a person ?
How will you separate camphor, common salt and iron nails from their mixture ?
How can you obtain pure water from a salt-water mixture (or salt-solution) ? Draw a neat and labelled diagram of the apparatus you would use to obtain pure water from a salt-water mixture (or salt-solution).
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 ?
All the matter made of ______.
Complete the following table:
| S.No. | CELSIUS | KELVIN |
| 1. | 90°C | 363 K |
| 2. | ______ | 283 K |
| 3. | 63 °C | ______ |
| 4. | 250°C | ______ |
| 5. | ______ | 303 K |
Gases change to liquid by the process of ______.
Write scientific reason.
Lemon sherbat has sweet, sour and salty taste and it can be poured in a glass.
