Q7 of 25 Page 154

i) Which gas is dissolved in soft drinks?

ii) What will you do to increase the solubility of this gas?


i) Carbon dioxide gas (CO2) is dissolved in soft drinks. When we open a soft drink bottle we observe that lot of bubbles show up. They arise because carbon dioxide trapped inside soft drink bottle starts escaping out.

ii) To increase the solubility of carbon dioxide in soft drinks we can increase the pressure of the gas. The reason for increasing the pressure is that with the increase in the pressure, the solubility of a gas also increases.


More from this chapter

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5

Find the concentration of the solution in terms of weight percent if 20g of common salt is dissolved in 50g of water.

 6

Valli took some common salt, naphthalene balls, camphor, baking soda and washing soda. She attempted to dissolve these substances either in water or in acetone.

Complete the table with the expected results.


 8

Beaker A has sugar mixed with water and Beaker B has starch dissolved in water.

i) Which solution will scatter light?


ii) In which beaker does the Brownian movement take place?


iii) Name the type of solution that beaker A and beaker B contain.


iv) Which of the two solutions is homogeneous?


v) Identify the beaker that has particles of size 10Å to 2000Å

 9

Name the type of solution formed in the following cases:

i) 20g of NaCl in 100g of water.


ii) 36g of NaCl in 100g of water.


iii) 45g of NaCl in 100g of water at 80°C.


iv) Sulphur dissolved in CS2


v) Nitrogen in the soil.