Advertisements
Advertisements
Question
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?
Advertisements
Solution
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.
APPEARS IN
RELATED QUESTIONS
Differentiate between an atom and a molecule.
Name a non-metal which is a good conductor of electricity.
What is meant by saying that metals are malleable and ductile?
What are the three groups into which all the elements can be divided ? Name two elements belonging to each group.
How would you confirm that a colourless liquid given to your is pure water ?
Which of the two will scatter light : soap solution or sugar solution ? Why ?
Calculate the concentration of a solution which contains 2.5 g of salt dissolved in 50 g of water.
Fill in the following blank :
Milk is a .................... solution but vinegar is a .................... solution.
9.72 g of potassium chloride dissolves in 30 g of water at 70°C. Calculate the solubility of potassium chloride at that temperature.
Fill in the following blanks with suitable words :
If a mixture contains iron filings as one of the constituents, it can be separated by using a .......................
How is cream separated from milk ?
With the help of a labelled diagram, describe the method of separating ammonium chloride from a mixture of ammonium chloride and common salt. Mention the difference in the properties of ammonium chloride and sodium chloride which has made this separation possible.
The correct increasing order of the boiling points of liquid oxygen, liquid argon and liquid nitrogen present in liquid air is :
Name one pair of liquids which can be separated by using a separating funnel.
What type of matter glass is?
Seema visited a Natural Gas Compressing Unit and found that the gas can be liquefied under specific conditions of temperature and pressure. While sharing her experience with friends she got confused. Help her to identify the correct set of conditions
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
Atoms are tiny particles that repel each other when they are squeezed very close.
Evaporation is always accompanied by ______ in temperature.
Write a scientific reason.
Lemon sherbat has a sweet, sour and salty taste and it can be poured in a glass.
