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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 the source from which litmus solution is obtained. What is the use of this solution?
Name the gas evolved when dilute HCl reacts with sodium hydrogencarbonate. How is it recognised?
The soil in a field in highly acidic. Name two materials which can be added to this soil to reduce its acidity. Give the reason for your choice.
Name a sodium compound which is a constituent of many dry soap powders.
The salt which will give a neutral solution on dissolving in water will be:
(a) CH3COONa
(b) NH4Cl
(c) KCl
(d) Na2CO3
Do basic solutions also have H+(aq)? Why are they basic?
Write balanced equation to satisfy the following statement:
\[\ce{Acid + Carbonate or bicarbonate -> Salt + water + Carbon dioxide}\]
Identify the following solutions, whether they are acid or base.
| Solution | Change in Indicator | Acid/Base | ||
| Litmus | Phenolphthalein | Methyl orange | ||
| 1. | -- | No change | -- | |
| 2. | -- | -- | Orange colour turns red | |
| 3. | Red litmus turns blue | -- | -- | |
Paheli is suffering from indigestion due to acidity. Is it advisable to give her orange juice in this situation and why?
The acid which contains four hydrogen atoms ______.
