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प्रश्न
Fill in the blank
pH scale was introduced by _________ in 1909.
उत्तर
pH scale was introduced by Sorencen in 1909.
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संबंधित प्रश्न
State the inference drawn from the following observations:
On carrying out the flame test with a salt P, a brick red flame was obtained. What is the cation in P?
What would you observe when blue litmus is introduced into a solution of hydrogen chloride gas?
What would you observe when red litmus paper is introduced into a solution of ammonia in water?
Mention the colour changes observed when the following indicator is added to acid: Methyl orange solution.
State the inference drawn from the following observation:
pH of liquid R is 10. What kind of substance is R?
What do you understand by pH value?
Solution P has a pH of 13, solution Q has a pH of 6 and solution R has a pH of 2.
Which solution will liberate ammonia from ammonium sulphate on heating?
A given white crystalline salt was tested as follows:
It dissolved in water and the resulting solution of the salt turned blue litmus red. What conclusions can be drawn for the observation?
Complete the following table and write your observations.
| Hydrogen sulphide | Ammonia | Sulphur dioxide | Hydrogen chloride | |
| Shake the gas with red litmus solution |
M is an element in the form of a powder. M burns in oxygen and the product obtained is soluble in water. The solution is tested with litmus. Write down only the word which will correctly complete the following sentence.
If M is a reactive metal, then ______ will be evolved when M reacts with dilute sulphuric acid.
