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प्रश्न
What is the effect of adding sodium hydroxide solution to these olfactory indicators?
उत्तर
The characteristic smell of an olfactory indicator is lost when it is added to a sodium hydroxide solution.
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संबंधित प्रश्न
- Both acids and bases change colour of all indicators.
- If an indicator gives a colour change with an acid, it does not give a change with a base.
- If an indicator changes colour with a base, it does not change colour with an acid.
- Change of colour in an acid and a base depends on the type of the indicator.
Which of these statements are correct?
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Fill in the following blank with suitable words:
The more acidic a solution, the ................. the pH.
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| A | 1 |
| B | 5 |
| C | 7 |
| D | 11 |
| E | 13 |
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| Sulphuric acid | : Red |
| Metal polish | : Dark blue |
| Washing-up liquid | : Yellow |
| Milk of magnesia | : Light blue |
| Oven cleaner | : Purple |
| Car batter acid | : Pink |
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In acidic solution, the colour of the hibiscus indicator paper will change to _____.
Which one of the following can be used as an acid- base indicator by a visually impared student?
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Phenolphthalein
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