Advertisements
Advertisements
प्रश्न
Give a reason why water is called a ‘universal solvent’ but, an alkali is not.
उत्तर
Water is a polar covalent compound. When it comes in contact with any substance it breaks the electrostatic forces holding the molecules of that substance. Thus, the molecules break loose from the substance and hence dissolve in water. Thus, water is called a universal solvent and an alkali is not.
APPEARS IN
संबंधित प्रश्न
How do the solubility of a solid and a gas affected by Increase in temperature.
Give two examples of Drying agent.
Give two example of Solvent other than water.
Give reason for Table salt becomes moist during rainy season.
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.
'Water is the universal solvent'. Comment.
How is air dissolved in water different from ordinary air?
Explain why boiled or distilled water tastes flat.
Explain the terms:
Solute
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
What is soap? For what is it used?
What is the advantage of a detergent over soap?
Give a reason for the following.
Water is a universal solvent.
Explain the importance of dissolved salts in water.
Take two pots with similar plants. Water one of the plants with tap water and the other with seawater. Record your findings and note the difference observed.
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?