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प्रश्न
Phenolphthalein gives ______ colour with lime water.
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उत्तर
Phenolphthalein gives pink colour with lime water.
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संबंधित प्रश्न
Oxides of metals are acidic in nature.
Sodium hydroxide is a ______.
Bases are soapy to touch when they are dry.
On adding phenolphthalein indicator to a colourless solution, no change is observed. What is the nature of this solution?
Boojho, Paheli and their friend Golu were provided with a test tube each containing China rose solution which was pink in colour. Boojho added two drops of solution ‘A’ in his test tube and got dark pink colour. Paheli added 2 drops of solution ‘B’ to her test tube and got green colour. Golu added 2 drops of solution ‘C’ but could not get any change in colour. Suggest the possible cause for the variation in their results.
Water-soluble bases are called ______.
Match the following:
| 1. | Wasp sting | a. | Milk of magnesia |
| 2. | Common salt | b. | Acetic acid |
| 3. | Organic acid | c. | Sodium chloride |
| 4. | Antacid | d. | Vinegar |
Which of the following pairs are weak bases?
Al(OH)3 & Zn(OH)2 are not alkalis.
NaOH & KOH are strong bases.
