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प्रश्न
Main constituent of base is ______.
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उत्तर
Main constituent of base is OH− ion.
संबंधित प्रश्न
Give one example in the following case:
A basic oxide which is soluble in water.
Give one example in the following case:
A base which is not an alkali.
Distinguish between acid and alkali (other than indicators).
Oxides of metals are acidic in nature.
All bases are alkalis.
Look at figure which shows solutions taken in test tubes A, B, C and D. What colour is expected when a piece of red litmus paper is dropped in each test tube? Nature of the solutions is given in the table for your help.
| Test tube | Nature of Solution | Change in colour of red litmus |
| A | Neutral | |
| B | Basic | |
| C | Acidic | |
| D | Neutral |
Phenolphthalein gives ______ colour with lime water.
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.
Name the base which is present in a window cleaner.
The nature of toothpaste commonly used is ______ in nature.
