Atmospheric Gases Dissolved In Water And Their Biological Significance Jamb Chemistry Past Questions
Question 1
In the production of soap, concentrated sodium chloride solution is added to
- A. increase the solubility of soap
- B. decrease the solubility of the soap
- C. saponify the soap
- D. emulsify the soap
Question 2
Detergents are more advantageous than soaps in hard water districts because
- A. on treatment with hard water they either form soluble calcium salts or do not react with calcium ion
- B. on treatment with hard water they form soluble calcium salts
- C. on treatment with hard water they form sodium salts
- D. on treatment with hard water they are converted into soaps
- E. on treatment with hard water they form more lather than soaps does
Question 3
The process that requires the use of hardwater in its operation is
- A. Tanning
- B. Bottling
- C. Laundry
- D. Dyeing
