Solubility Experiment of Ammonia

Q.

Colour of methyl orange and phenolphthalein in basic medium

Q.

Give two examples of deliquescent substances.

Q.

Why the colour of litmus paper changes??

Q.

Which of the following is a saturated solution of ammonia in water?

1. Liquor ammonia fortis

2. Gaseous ammonia

3. Urine

4. Urea

Q.

Aquatic species are more comfortable in cold water because __________

1. as the temperature decreases the solubility of dissolved oxygen decreases.

2. as the temperature decreases the solubility of dissolved oxygen increases.

3. as the temperature increases the solubility of dissolved oxygen increases.

4. as the temperature increases the solubility of dissolved oxygen decreases.

Q.

A student prepared the solutions of

1. an acid

2. a base in two separate beakers.

She forgot to label the solutions and litmus paper is not available in the laboratory. Since both the solutions are colourless, how will she distinguish between the two?

Q.

You are conducting the Ammonia Fountain Experiment. You use blue litmus solution to perform the experiment. What will you observe as a result of this experiment?

1. The solution in the flask remains blue

2. The solution in the flask turns colourless

3. The solution in the flask turns red

4. The solution in the flask turns brown

Q. Amisha has two solutions labelled 'A' and 'B'. On addition of phenolphthalein to each of them, solution A gives a pink colour, and solution B remains colourless. What can be determined about the nature of the solutions from the above observations?

1. A- Acid, B- Base
2. A- Base, B- Acid
3. A- Neutral, B- Base
4. A- Neutral, B- Acid

Q. Which one of the following can be used as an acid-base indicator by a visually impaired student? Justify your answer.
(a) Litmus
(b) Turmeric
(c) Vanilla essence
(d) Phenolphthalein

Q.

In the fountain experiment, what is the colour change observed when colourless phenolphthalein solution is added to a flask containing ammonia?

1. Pink

2. Remains colourless

3. magenta

4. Orange

Q. A substance that changes color in response to a chemical change is called as indicator . and Name of the indicator used when sodium hydroxide is titrated against sulphuric acid is phenolpthalein .
For true add 0 and for false add 1.

Q. What do you observe in the above titration setup when 15 mL of the $NaOH$ with an unknown molarity is poured into the flask and then 5 drops of phenolphthalein indicator is added?

1. There will be a temporary pinkish color that will dissipate.
2. There will be a temporary blue color that will dissipate.
3. There will not be a color change.
4. A pinkish color will appear throughout the solution.
5. A blue color will appear throughout the solution.

Q. How is ammonia collected?

Q. An ......... is a compound that changes color in the presence of an acid or base.

1. Catalyst
2. Indicator
3. Acid
4. Reagent

Q.

Which property of ammonia can be proved from the fountain experiment?

1. Basic property of water

2. Solubility of ammonia in water

3. Solubility of ammonia in aqua regia

4. Pungent smell of ammonia

Q. What is the indicator used for the titration between oxalic acid and sodium hydroxide ? Justify your answer with suitable reason.

Q. in cold climate water gets frozen causing damage to rotation of car. ethylene glycol is used as antifreezing agent. calculate the amount of ethylene glycol to be added to 4 kg of water to prevent it from freezing at -6c