Solution

Pratiksha dissolved $105 \mathrm{g}$ of copper sulphate in $250 \mathrm{g}$ of water at $298 \mathrm{K}$. She stirred the solution thoroughly and after filtering it $25 \mathrm{g}$ of copper sulphate was obtained as the residue. In order to dissolve the obtained residue in the above solution at the same temperature, the amount of water that should be added by her will be

What happens to the cold drinks when we keep it in open for sometime

If the density of water is $1 \mathrm{gm}/\mathrm{mL}$ then find its molarity.

In $500$ ml of water, $30$ g of glucose and $20$g of common salt is dissolved. Calculate the concentration of:

(a) Glucose and 

(b) common salt in terms of mass by a mass percentage of the solution. (Density of water is $1 \mathrm{g}/\mathrm{ml}$ )

Put a drop of blood in three types of liquids:

• Pure water
• Salt solution
• Water containing $5 \mathrm{M}$ glucose and $0.9 \% \mathrm{NaCl}$.

What will happen to the blood drop and why? Explain your answer.

Seema took three solids, $\mathrm{a}$, $\mathrm{b}$, and $\mathrm{c}$ and made their saturated solutions in $100 \mathrm{g}$ water at different temperatures. The amounts of $\mathrm{a}$, $\mathrm{b}$ and $\mathrm{c}$ used to form a saturated solution in $100 \mathrm{g}$ water at different temperatures. The amounts of $\mathrm{a}$, $\mathrm{b}$, and $\mathrm{c}$ used to form saturated solutions are shown in the table:

What is the concentration in mass percent of $\mathrm{a}$ and $\mathrm{c}$ at $353\mathrm{K}$ respectively?

Seema took three solids, $\mathrm{a}$, $\mathrm{b}$, and $\mathrm{c}$ and made their saturated solutions in $100 \mathrm{g}$ water at different temperatures. The amounts of $\mathrm{a}$, $\mathrm{b}$ and $\mathrm{c}$ used to form a saturated solution in $100 \mathrm{g}$ water at different temperatures. The amounts of $\mathrm{a}$, $\mathrm{b}$, and $\mathrm{c}$ used to form saturated solutions are shown in the table:

Explain the term: dilute solution

 A solution that has a relatively small amount of dissolved solute is called as:

A _____ solution is a one that has only a little solute dissolved in a certain amount of solvent.

What do you understand by dilution? Explain what is a dilute solution.

Which of the following is not an example of dilute solution?

Define solution. Write the characteristics of the solution.

Solubility of hydrogen in water is 

Which of the following non-metal is used in the purple-coloured antiseptic solution?

Define Solvent?

Name the technique for the separation of the following:
Copper sulphate crystals from its aqueous solution. (crystallisation/ winnowing/ distillation)

Answer in one or two words.
Aerated drinks contain this gas.