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Deepak Rock
@deepak-rock
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Joined: Aug 6, 2021
Last seen: Sep 10, 2021
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Topics: 1742 / Replies: 303
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Topic
Two drinks P and Q gave acidic and alkaline reactions, respectively. One has a pH value of 9 and the other has a pH value of 3. Which drink has the pH value of 9?
4 years ago
Forum
Acids, bases and salt
Replies: 0
Views: 193
Topic
Two solutions A and B have pH values of 3.0 and 9.5 respectively. Which of these will turn litmus solution from blue to red and which will turn phenolphthalein from colourless to pink?
4 years ago
Forum
Acids, bases and salt
Replies: 0
Views: 85
Topic
Two solutions X and Y are tested with universal indicators. Solution X turns orange whereas solution Y turns red. Which of the solutions is a stronger acid?
4 years ago
Forum
Acids, bases and salt
Replies: 0
Views: 192
Topic
A beaker of concentrated hydrochloric acid has a pH of 1. What colour will full range universal indicator turn if it is added to this beaker? Is it a strong or a weak acid?
4 years ago
Forum
Acids, bases and salt
Replies: 0
Views: 144
Topic
What colour will universal indicator show if you add it to the following substances? (a) potassium hydroxide, pH = 12 (b) soda water, pH = 5
4 years ago
Forum
Acids, bases and salt
Replies: 0
Views: 305
Topic
What is the name of the indicator which can be used for testing the pH of a solution?
4 years ago
Forum
Acids, bases and salt
Replies: 0
Views: 139
Topic
The pH of soil A is 7.5 while that of soil B is 4.5. Which of the two soils, A or B, should be treated with powdered chalk to adjust its pH and why?
4 years ago
Forum
Acids, bases and salt
Replies: 0
Views: 95
Topic
Name the indicator which can give us an idea of how strong or weak an acid or base is.
4 years ago
Forum
Acids, bases and salt
Replies: 0
Views: 59
Topic
Name the scientist who developed the pH scale.
4 years ago
Forum
Acids, bases and salt
Replies: 0
Views: 51
Topic
Which is more basic (or more alkaline) a solution of pH = 8 or a solution of pH = 11?
4 years ago
Forum
Acids, bases and salt
Replies: 0
Views: 86
Topic
Which is more acidic a solution of pH = 2 or a solution of pH = 6?
4 years ago
Forum
Acids, bases and salt
Replies: 0
Views: 68
Topic
What is the pH of a neutral solution?
4 years ago
Forum
Acids, bases and salt
Replies: 0
Views: 83
Topic
Why does tooth decay start when the pH of mouth is lower than 5.5?
4 years ago
Forum
Acids, bases and salt
Replies: 0
Views: 90
Topic
What is common in all the water-soluble bases (or alkalis)?
4 years ago
Forum
Acids, bases and salt
Replies: 0
Views: 76
Topic
What is the common name of water soluble bases?
4 years ago
Forum
Acids, bases and salt
Replies: 0
Views: 204
Topic
Name the gas evolved when zinc granules are treated/heated with: (a) hydrochloric acid solution (b) sodium hydroxide solution
4 years ago
Forum
Acids, bases and salt
Replies: 0
Views: 279
Topic
What happens to (a) the H+ ions, and (b) temperature of the solution, when an acid is neutralised?
4 years ago
Forum
Acids, bases and salt
Replies: 0
Views: 155
Topic
How is the neutralisation of carbonate with an acid different from the neutralisation of an oxide or a hydroxide?
4 years ago
Forum
Acids, bases and salt
Replies: 0
Views: 74
Topic
A substance X which is used as an antacid reacts with dilute hydrochloric acid to produce a gas Y which is used in one type of fire-extinguisher. Name the substance X and gas Y. Write a balanced equation for the chemical reaction which takes place.
4 years ago
Forum
Acids, bases and salt
Replies: 0
Views: 234
Topic
You have been provided with three test tubes. One of these test tubes contains distilled water and the other two contain an acidic and a basic solution respectively. If you are given only blue litmus paper, how will you identify the contents of each ...
4 years ago
Forum
Acids, bases and salt
Replies: 0
Views: 211
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