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प्रश्न
Give two examples of Drying agent.
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उत्तर
Concentrated sulphuric acid (H2SO4), phosphorus pentoxide (P2O5), quicklime (CaO)
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संबंधित प्रश्न
Give two example of Solvent other than water.
What are the observations and conclusions when tap water is boiled and evaporated in watch glass?
What is the importance of dissolved salts in water?
Explain the term:
Solute
Explain the terms:
Solvent
Explain why:
The solute cannot be separated from a solution by filtration.
In which of the following substances will there be
Decrease in mass
In which of the following substances will there be
No change in mass when they are exposed to air?
Sodium chloride
Iron
Conc. sulphuric acid
Table salt
Sodium carbonate crystals
What is soap? For what is it used?
Why does the hardness of water render it unfit for use in a boiler.
Why does the hardness of water render it unfit for use in a washing purposes.
Select the correct answer of the following statement:
The medium of dissolution which allows the solute to dissolve in it.
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.
What insoluble substance? Give examples.
Aquatic plants make use of dissolved ______ for photosynthesis.
Explain the importance of dissolved salts in water.
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 |
