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प्रश्न
Distinguish between acid and alkali (other than indicators).
उत्तर १
An acid is that substance which gives H+ ions when dissolved in water.
An alkali is that substance which gives OH− ions when dissolved in water.
उत्तर २
Acids: Have a sour taste.
Alkalis: They have a Sharp bitter taste, and they are soapy to the touch.
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संबंधित प्रश्न
Salts are neutral.
Write the balanced equation for the reaction of:
A named acid and a named alkali.
What is the term defined by the following?
A base which is soluble in water.
Bases are ______ in taste.
Which of the following is not a base?
Look at Figure 5.1 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? The 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.
Match the following:
| 1. | Sulphuric acid | a. | Weak base |
| 2. | Sodium hydroxide | b. | Strong acid |
| 3. | Acetic acid | c. | Strong base |
| 4. | Ammonium hydroxide | d. | Weak acid |
Which of the following pairs are weak bases?
What does the acidity of the base mean?
