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प्रश्न
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?
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उत्तर
The process of drying the shirt can be made faster in the following ways:
- Spread the shirt to increase the surface area which will increase the rate of evaporation.
- Put it in the sun to increase the temperature to increase the rate of evaporation.
- Keep it under the fan to increase the wind speed which increases the rate of evaporation.
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संबंधित प्रश्न
Define the term matter. What is it composed of?
Which of the following materials fall in the category of a “pure substance”?
- Ice
- Milk
- Iron
- Hydrochloric Acid
- Calcium oxide
- Mercury
- Brick
- Wood
- Air
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
Which of the following are compounds ?
- CO
- No
- NO
- Co
The element which is not common between the compounds called baking soda and soda ash is
What happens when the temperature of a saturated sugar solution is increased ?
One of the following represents the solution of solid in a solid. This one is :
The solubility of ammonium chloride in water at various temperatures is given below :
| Temperature | : | 10°C | 20°C | 40°C | 60°C | 80°C |
| Solubility | : | 24 g | 37 g | 41 g | 55 g | 66 g |
What mass of ammonium chloride would be needed to make a saturated solution of ammonium chloride in fifty grams of water at 40°C ?
Name the process which can be used to recover salt from an aqueous salt solution.
How would you separate iodine from a mixture of iodine and common salt ?
How will you separate a mixture of common salt, sulphur powder and sand ?
How will you separate camphor, common salt and iron nails from their mixture ?
Define the term matter.
Which among the following is not a matter?
Which of the following statements are true for pure substances?
(i) Pure substances contain only one kind of particles
(ii) Pure substances may be compounds or mixtures
(iii) Pure substances have the same composition throughout
(iv) Pure substances can be exemplified by all elements other than nickel
Which of the following are homogeneous in nature?
(i) ice
(ii) wood
(iii) soil
(iv) air
Atoms or groups of atoms having a charge are called ______.
The pressure of gases does not depend on the temperature of the gas and the volume it occupies.
Define the term matter.
Define the term matter.
