Describe how the following change is brought about : Impure titanium into pure titanium.

Describe how the following change is brought about : Pig iron into steel.

Describe how the following change is brought about : Zinc oxide into metallic zinc.

Describe how the following expressions are obtained: 7xy+5

Describe how the following expressions are obtained: x^(2)y

Describe how each of the following is achieved in us: hearing

Describe how each of the following is achieved in us: balance

Describe how the following expressions are obtained: 4x^(2)-5x

Two beakers of capcatity 500 mL were taken one of these beakers labelled as "A" was filled with 400 mL water whereas the beaker labelled "B" was filled with 400 mL of 2 M solution of NaCl. At the same temperature both the beakers were placed in close containers of same material and same capacity as shown in the figure given below: At a given temperature, whihc of the following statement is correct about the vapour pressure of pure water and that of NaCl solution.