Advertisements
Advertisements
प्रश्न
The pH of a cold drink is 5. What will be its action on blue and red litmus solutions?
उत्तर
A cold drink with a pH value of 5 is acidic. Therefore, blue litmus turns red and red litmus remains as it is.
APPEARS IN
संबंधित प्रश्न
You have two solutions, A and B. The pH of solution A is 6 and pH of solution B is 8. Which solution has more hydrogen ion concentration? Which of this is acidic and which one is basic?
- Both acids and bases change colour of all indicators.
- If an indicator gives a colour change with an acid, it does not give a change with a base.
- If an indicator changes colour with a base, it does not change colour with an acid.
- Change of colour in an acid and a base depends on the type of the indicator.
Which of these statements are correct?
hich is more basic (or more alkaline) : a solution of pH = 8 or a solution of pH = 11?
Name the indicator which can give us an idea of how strong or weak an acid or base is.
Explain how pH change in the lake water can endanger the lives of aquatic animals (like fish). What can be done to lessen the danger to the lives of aquatic animals in the lake?
What do you think will be the pH in the stomach of a person suffering from indigestion: less than 7 or more than 7?
Separate the following into substances having pH values above and below 7. How do these influence litmus paper?
(i) Lemon juice
(ii) Solution of washing soda
(iii) Toothpaste
(iv) Vinegar
(v) Stomach juices
A solution turns blue litmus red. Its pH is likely to be:
(a) 7
(b) 5
(c) 8
(d) 14
Solution A turns universal indicator blue to purple whereas solution B turns universal indicator orange to red.
What sort of reaction takes place when solution A reacts with solution B?
Acids and bases can be identified in the laboratory by ______.
