Question

2 The acid present in soda or fizry drink is Carbonic acid
3. Blue litmus paper turns red in presence of an acid
Acid is formed in a neutralisation reaction.
5. Ant sting contains Acetic acid.
3. Tooth
eating
3
F
4
C. Short Answer Questions
1
A few drops of phenolphthalein indicator were added to an unknown solution at a
pink colour. Now another unknown solution B was added to it drop by drop and the color
becomes colourless Predict the nature of A and B
2 How does milk of magnesia help to relieve stomach pain due to acidity?
Name the source from which litmus solution is extracted? Mention the importance of this site
A substance X is used in the kitchen for making tasty crispy pakoras is also an ingredients
antacid. Name the substance X is the pH value of solution of x is lesser than or greater than
You have been provided with three test tubes. One of them contains distilled water one
contain an acidic solution and basic solution, respectively If you are given only red in
how will you identify the contents of each test tube
Differentiate between organic acids and mineral acids with suitable examples
What is neutralisation reaction? State two examples of neutralisation reaction from
day-to-day life
Value Based
Farmers are
production a
to the solas
S
Do you a
Why cher
Why shou
6.
7
G. Experiment Be
Red Cabbage
bases/neutral
8
What are neutral substances? Which of the following substances are neutralna
Hydrochloric acid, lime water, salt solution, caustic soda, water, sugar solution? Give reason
In a beaker chog
to stand und istu
coloured liquid
Tilme To Act
1 Collect sous
neutral natur
D. Long Answer Questions
1. What are indicators? Describe what kind of changes take place when the following indicator
are exposed to acids and bases?
a. Litmus solution
b. Methyl orange
Turmeric
d. China Rose
2. Give two uses of each of the following:
a Hydrochloric acid
b. Sodium hydrnces
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Answer 1

Answer:

Carbonated soft drink ... Carbon dioxide forms carbonic acid with water which turns blue litmus ... (C) Curd contains lactic acid and hence turns blue litmus ... 3 mins read.

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