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प्रश्न
Name the source from which litmus solution is obtained. What is the use of this solution?
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उत्तर
Litmus solution is derived from lichens and serves as an indicator. When removed, it appears bright purple. It turns blue when added to bases but red when introduced to acids.
It is used as an indicator to distinguish between acids and bases.
| Solution | Colour of the litmus solution |
| Acidic | Red |
| Basic | Blue |
| Neutral | No change |
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संबंधित प्रश्न
You have been provided with three test tubes. One of them contains distilled water and the other two contain an acidic solution and a basic solution, respectively. If you are given only red litmus paper, how will you identify the contents of each test tube?
Three solutions P, Q and R have pH value of 3.5, 5.2 and 12.2 respectively. Which one of these is a:
- Weak acid?
- Strong alkali?
Name one natural source of the following acid:
Citric acid
What effect does the concentration of \[\ce{H+_{( aq)}}\] ions have on the nature of a solution?
The salt which will give a neutral solution on dissolving in water will be ______.
Name an acid used as an eyewash.
Which of the following statements is true for acids?
Fill in the missing data in the following table
| Name of the salt | Formula | Salt obtained from | ||
| Base | Acid | |||
| (i) | Ammonium chloride | NH4Cl | NH4OH | ______ |
| (ii) | Copper sulphate | ______ | ______ | H2SO4 |
| (iii) | Sodium chloride | NaCl | NaOH | ______ |
| (iv) | Magnesium nitrate | Mg(NO3)2 | ______ | HNO3 |
| (v) | Potassium sulphate | K2SO4 | ______ | ______ |
| (vi) |
Calcium nitrate | Ca(NO3)2 | Ca(OH)2 | ______ |
Which of the following is an acid-base indicator?
Citric acid is present in ______.
