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प्रश्न
Metal corrodes due to salts.
पर्याय
True
False
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उत्तर
This statement is True.
संबंधित प्रश्न
What do you understand by an alkali?
State the term defined by the following sentence:
A soluble base.
What is the term defined by the following?
A base which is soluble in water.
Bases are soapy to touch when they are dry.
All bases are alkalis.
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 |
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 |
What are bases?
______ alkali has a relatively high percentage of alkali in its aqueous solution.
A small amount of copper oxide was taken in a beaker and dilute hydrochloric acid was added with continuous stirring of the solution. Name the compound formed and state the colour of its solution. Write the balanced chemical equation for the reaction that occurs. Based on the reaction, state the nature (acidic/basic) of copper oxide.
