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प्रश्न
Chemical formula of calcium oxide is _______
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उत्तर
Chemical formula of calcium oxide is CaO.
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संबंधित प्रश्न
Give one example in the following case:
A basic oxide which is soluble in water.
Distinguish between acid and alkali (other than indicators).
Why indicator does not get affected by salt?
Bases are ______ in taste.
Give the significance of pH of soil in agriculture.
Match the important chemicals given in Column (A) with the chemical formulae given in Column (B)
| Column (A) | Column (B) |
| (a) Plaster of Paris | Ca(OH)2 |
| (b) Gypsum | CaSO4. 1/2 H2O |
| (c) Bleaching Powder | CaSO4.2H7O |
| (d) Slaked Lime | CaOCl2 |
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.
Which of the following pairs are weak bases?
______ alkali has a relatively high percentage of alkali in its aqueous solution.
