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प्रश्न
What do you understand by an alkali?
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उत्तर
An alkali is a basic hydroxide which when dissolved in water produces hydroxyl ions (OH−) as the only negatively charged ions.
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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 hydroxide which is highly soluble in water.
Give one example in the following case:
A basic oxide which is insoluble in water.
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 |
Sodium carbonate is commercially called ______.
All bases are alkalis but all alkalis are not bases.
Al(OH)3 & Zn(OH)2 are not alkalis.
NaOH & KOH are strong bases.
One of the events that does not occur during photosynthesis is ______.
Choose the most appropriate answer from
(SO2, SiO2, Al2O3, CO, MgO, Na2O)
A basic oxide.
