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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.
Give reason for Table salt becomes moist during rainy season.
Discuss the importance of water as a solvent for our body .
What do you mean by solubility of a solute in a solvent ?
'Water is the universal solvent'. Comment.
What are the observations and conclusions when tap water is boiled and evaporated in watch glass?
How is air dissolved in water different from ordinary air?
Explain why boiled or distilled water tastes flat.
Explain the term:
Solute
Explain the terms:
Solvent
In which of the following substances will there be
Increase 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
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.
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 of the following statement:
The medium of dissolution which allows the solute to dissolve in it.
State why ‘Water is considered a universal solvent’. Give the reason for the same.
State whether the following statement is true or false.
Water can be separated from salt by evaporation.
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 |
