Neutralisation Reaction

Q.

What happens when Concentrated ${\mathrm{H}}_2{\mathrm{SO}}_4$is added to Sugar?

Q.

In the following list of salts, identify normal, acid and basic salts

(a) KHCO₃

Q.

239. In the following list of salts, identify normal, acid and basic salts

(b) Na₃PO₄

Q.

Acetic acid was added to a solid X and kept in a test tube. A colorless and odorless gas Y has evolved. The gas was passed through lime water which turned milky. Name X and Y and write the chemical reaction.

Q.

a) What are salts? How are they formed from acids and bases? Are they acidic, basic or neutral? Give examples. [3 MARKS]
b) Give names of the acids found in the following substances: i) Vinegar ii) Curd. [2 MARKS]

Q.

Neutralization reaction is an example of ______ reaction.

1. Endothermic

2. Exothermic

3. Decomposition

4. None of the above

Q. Methyl orange turns _____ colour in basic solution.

1. pink
2. yellow
3. blue
4. red

Q. Assertion (A): Certain toxic gases produced by industries mix with raindrops high in the atmosphere and make rain unusually acidic. This is called acid rain.
Reason (R): Turn off your electronics when you do not use them to reduse Noise pollution.

1. Both A and R are true and R is the correct explanation of A.

2. Both A and R are true but R is NOT the correct explanation of A.

3. A is true but R is false.

4. Both A and R are false.

Q. Find out the missing pair from the following table:

Air	?
Water	Sewage
Soil	Dumping Metals

1. Acid rain
2. Groundwater
3. Agricultural pollutants
4. None of the above

Q. Which of the following can change the colour of red litmus to blue?

1. Vinegar
2. Sodium hydroxide
3. Sulphuric acid
4. Lemon juice

Q. Choose the correct statement from the following options.

1. Potassium hydroxide will turn blue litmus to red.
2. Sodium hydroxide will turn red litmus to blue.
3. Citric acid will turn red litmus to blue.
4. Acetic acid will turn red litmus to blue.

Q. Methyl orange turns _____ colour in basic solution.

1. red
2. pink
3. blue
4. yellow

Q. Choose the correct statement from the following options.

1. Acetic acid will turn red litmus to blue.
2. Sodium hydroxide will turn red litmus to blue.
3. Potassium hydroxide will turn blue litmus to red.
4. Citric acid will turn red litmus to blue.

Q.

Which gas is released during the reaction of baking soda with vinegar?

1. Hydrogen

2. Oxygen

3. Carbon dioxide

4. None of these

Q. Ram was given a jar filled with distilled water. What would be his observation when he adds a drop of phenolphthalein in this jar?

1. Water turns blue in colour
2. Water turns pink in colour
3. Water turns red in colour
4. Water remains colourless

Q. A base turns litmus solution .

1. red
2. green
3. yellow
4. blue