Advertisements
Advertisements
प्रश्न
You have been given a suspension and a solution. How could you tell the difference between them by their appearance ?
उत्तर
Both the given solutions will be kept stationary in different beakers for some time. The beaker in which the dissolved particles settle down after some time is a suspension and another one is a solution.
APPEARS IN
संबंधित प्रश्न
The molecules can move freely anywhere in
Name the terms for the change of a solid into liquid.
Fill in the blank
Any matter which has a definite _______ but no definite shape is called a _______
Explain why air is used to inflate tyres.
Which of the two will scatter light : soap solution or sugar solution ? Why ?
What happens when the temperature of a saturated sugar solution is increased ?
What will happen if a saturated solution is :
- heated
- cooled
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 does not show Tyndall effect. This one is :
How will you separate a mixture containing sand and sugar ?
How is the impurity of iron present in several substances removed in industries ?
Explain how, impure copper sulphate can be purified by crystallisation.
Which of the following cannot be separated from air by the process of fractional distillation ?
The correct increasing order of the boiling points of liquid oxygen, liquid argon and liquid nitrogen present in liquid air is :
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 ?
Which among the following is not a matter?
Match the physical quantities given in column A to their S I units given in column B:
| (A) | (B) | ||
| (a) | Pressure | (i) | cubic metre |
| (b) | Temperature | (ii) | kilogram |
| (c) | Density | (iii) | pascal |
| (d) | Mass | (iv) | kelvin |
| (e) | Volume | (v) | kilogram per cubic metre |
Liquids cannot be compressed and they have fixed volume.
The physical state of water at 373 K is ______.
Evaporation is always accompanied by ______ in temperature.
