| 1 |
The water which produces good lather with soap is called: |
- A. soft water
- B. hard water
- C. heavy water
- D. typical water
|
| 2 |
Which one of the following disease causes severe diarrhea and can be fatal: |
- A. Jaundic
- B. Dysentery
- C. Cholera
- D. Typhoid
|
| 3 |
Ionic compounds are soluble in water due to: |
- A. Hydrogen bonding
- B. ion-dipole forces
- C. Dipole-dipole forces
- D. Dipole -induced dipole forces
|
| 4 |
Industrial effluents are highly |
- A. Toxic organic compounds.
- B. Inorganic salts.
- C. Heavy metals
- D. All of them
|
| 5 |
Water become hard because of: |
- A. Ca+2
- B. Mg+2
- C. SO-24
- D. all of these
|
| 6 |
The percentage of potable water on earth is. |
- A. 2%
- B. 0.2%
- C. 0.02%
- D. 0.002%
|
| 7 |
Chemical formula of hypochlorous acid is. |
- A. HCl
- B. HOCl
- C. H<sub>2</sub>CO<sub>3</sub>
- D. HF
|
| 8 |
soap is the sodium salt of long chain. |
- A. Amino acids
- B. Fatty acids
- C. Nucleotides
- D. None of them
|
| 9 |
Which disease is caused by polluted water. |
- A. Cholera
- B. Typhoid
- C. Diarrhea
- D. All of them
|
| 10 |
the removal of which ion causes water softening. |
- A. Na<sup>+</sup>
- B. Mg<sup>2</sup>
- C. Li<sup>+</sup>
- D. K<sup>+</sup>
|