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प्रश्न
Give two examples of Drying agent.
उत्तर
Concentrated sulphuric acid (H2SO4), phosphorus pentoxide (P2O5), quicklime (CaO)
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संबंधित प्रश्न
Give two example of Solvent other than water.
Why is sea water salty ?
Discuss the importance of water as a solvent for our body .
Discuss the importance of water as a solvent for plants.
What do you mean by solubility of a solute in a solvent ?
What is the importance of dissolved salts in water?
Explain why:
Ice at zero degrees centigrade has greater cooling effect than water at 0oC.
Explain why:
Lakes and rivers do not suddenly freeze in the winters.
Explain why:
The solute cannot be separated from a solution by filtration.
In which of the following substances will there be
Increase in mass
In which of the following substances will there be
Decrease in mass
Why does the hardness of water render it unfit for use in a washing purposes.
Name the gas that:
Does not affect acidified K2Cr2O7 paper but turns lime water milky.
Give a reason why boiled water tastes flat.
Select the correct answer from the choice given in the options.
A deliquescent salt of a divalent metal _____.
Give a reason for the following.
Water is a universal solvent.
Aquatic plants make use of dissolved ______ for photosynthesis.
Sheela, Saima and Ravi have to dissolve maximum amount of sugar in the same amount of milk so as to win in a game. Ravi took hot boiling milk while Saima took ice cold milk. Sheela managed to get milk at room temperature. Whom do you think would win the game and why?
Paheli was feeling thirsty but there was only a pot of water at home which was muddy and unfit for drinking. How do you think Paheli would have made this water fit for drinking if the following materials were available to her.
| Alum | tub | muslin cloth | gas stove | thread | pan and lid |
