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प्रश्न
The label on the bottle of chemical is spoiled. How will you find whether the chemical is acidic or not?
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उत्तर
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.
संबंधित प्रश्न
Name one natural source of the following acid:
Oxalic acid
When a piece of limestone reacts with dilute HCl, a gas X is produced. When gas X is passed through lime water then a white precipitate Y is formed. On passing excess of gas X, the white precipitate dissolves forming a soluble compound Z.
- What are X, Y and Z?
- Write equations for the reactions which take place:
- When limestone reacts with dilute HCl.
- When gas X reacts with lime water to form white precipitate Y.
- When excess of gas X dissolves white precipitate Y to form a soluble compound Z.
The soil in a field is highly acidic. Name two materials which can be added to this soil to reduce its acidity. Give the reason for your choice.
Give one example in the following case:
A hydrogen containing compound which is not an acid.
Which are the industrial uses of acids?
Write a balanced reaction for the following conversions (A, B, C, D)
\[\ce{Fe→[A]FeCl2 →[B]FeCO3→[C]Fe(NO3)2→[D]Fe(OH)2}\]
What are the uses of acids?
Which is the strongest acid in the following?
Draw the structure of Hydronium ion.
Name the acid present in lemon.
