Salts and pH of Salts

Q. Which of the following is not a source of common salt?

1. Lagoon
2. Mountain
3. River
4. Sea

Q.

Where is the sea water trapped in order to obtain common salt from it?

1. Lagoons

2. Deltas

3. Rivers

4. Sea shore

Q. Fire caused by oil or petrol can be turned off by _____ based fire extinguishers.

1. water
2. soda
3. ammonia
4. oxygen

Q. Match the nature of salts formed with acid-base interaction given below.

1. Acidic
2. Basic
3. Neutral

Q. A lab technician made a salt using a strong acid and a weak base. According to you what should be the nature of the salt formed?

1. Acidic and pH less than 7
2. Basic and pH more than 7
3. Neutral and pH equal to 7
4. Can't be determined

Q. ${\mathrm{CH}}_3\mathrm{COOH}\left(\mathrm{aq}\right)+\mathrm{NaOH}\left(\mathrm{aq}\right)\to {\mathrm{CH}}_3\mathrm{COONa}\left(\mathrm{aq}\right)+H_{2}O\left(l\right)$
The pH of the resultant solution will be .

1. acidic
2. neutral
3. alkaline

Q. Water obtained from a _______ is most likely to be soft in nature.

1. lake
2. lagoon
3. glacier
4. river

Q. The pH of bases lies between 7 and 14

1. \N
2. \N

Q. Which activity requires water?

1. Irrigation
2. Driving
3. Watching TV
4. Singing

Q. Dry slaked lime on reaction with chlorine gives

1. Pure anhydrous Calcium chloride
2. Bleaching powder
3. A combination of , dibasic Calcium hypochlorite - and dibasic Calcium Chloride - .
4. Both (A) and (C)

Q. A salt formed after the neutralisation reaction is a combination of of an acid and of a base.

1. anion
2. mass
3. cation
4. volume

Q. A strong acid and a weak base reacts to form a salt. What will be the pH value of this salt in aqueous solution?

1. Variable pH, may be less or more than 7 at a particular instance
2. pH = 7
3. pH > 7
4. pH < 7