Advertisements
Advertisements
प्रश्न
Give reason for Table salt becomes moist during rainy season.
Advertisements
उत्तर
On exposure to air, table salt (NaCl) turns moist and ultimately forms a solution especially during rainy season because it contains impurities like magnesium chloride and calcium chloride which are deliquescent. Sodium chloride is not deliquescent.
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.
Why is sea water salty ?
Discuss the importance of water as a solvent for plants.
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?
How is air dissolved in water different from ordinary air?
State the term: (Do not give examples)
A solution where solvent is a liquid other than water.
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
What is the advantage of a detergent over soap?
Name the gas that:
Does not affect acidified K2Cr2O7 paper but turns lime water milky.
Give a reason why water is called a ‘universal solvent’ but, an alkali is not.
Give a reason why boiled water tastes flat.
State why ‘Water is considered a universal solvent’. Give the reason for the same.
Give a reason for the following.
Water is a universal solvent.
What insoluble substance? Give examples.
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?
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 |
