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Question
The label on the bottle of chemical is spoiled. How will you find whether the chemical is acidic or not?
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Solution
The chemical is acidic or not checked in two ways:
- By use of litmus paper:
- If the given solution is acidic, it turns blue litmus to red litmus.
- If the given solution is basic, it turns red litmus to blue litmus.
- If the given solution is neutral, there is no effect on litmus paper.
- By use of indicators:
- If the given solution is acidic, it turns methyl orange to red.
- If the given solution is basic, it turns methyl orange to yellow.
- If the given solution is neutral, there is no effect on methyl orange indicator.
RELATED QUESTIONS
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Oxalic acid
One of the following is not an organic acid. This is:
Define an acid.
Choose the correct answer from the options given below
Which of them occurs in solid state?
Complete the following table and write one equation for each to justify the statement:
|
Reactants |
Products |
Method |
|
Soluble base + Acid (dil) |
Salt + water |
Neutralisation Titration |
|
Metal + Non-metal |
Salt (soluble/insoluble) |
______ |
|
Insoluble base + ______ |
Salt (soluble) + water |
______ |
|
Active metal + Acid (dil) |
______ + ______ |
______ |
|
Soluble salt solution (A) + Soluble salt solution (B) |
Precipitated salt + Soluble salt |
______ |
|
Carbonate/bicarbonate + Acid (dil) |
Salt + ______ + ______ |
Decomposition of carbonate |
|
Chlorides/nitrates + Acid (conc.) |
______ + ______ |
Decomposition of chlorides and nitrates |
In acidic solutions blue litmus changes into ______ colour.
Vinu and Priyan take their lunch at school. Vinu eats lemon rice and Priyan eats curd rice. Both lemon rice and curd rice are sour in taste. What is the reason?
State whether the following statement is true or false. Correct the false statement.
A compound if acidic will turn all indicators red.
The Acid secreted in our stomach is ______.
Name the acid present in lemon.
