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प्रश्न
The pH of rainwater is 7.
उत्तर
False.
The pH of rainwater is less than 7.
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संबंधित प्रश्न
Draw neat and labelled diagram of pH scale.
Which one of the following types of medicines is used for treating indigestion?
The colour of universal indicator solution is ____________.
(a) red
(b) blue
(c) green
(d) greenish yellow
Fill in the blank
Magnesia is used in making __________.
Explain the pH scale with the proper diagram.
A solid compound ‘A’ decomposes on heating into ‘B’ and a gas ‘C’. On passing the gas ‘C’ through water, it becomes acidic. Identify A, B, and C.
What is the pH range of our body?
Rain is called acid rain when it:
When copper oxide and dilute hydrochloric acid react, colour changes to ____________.
pH of H2O is ____________.
Ag2S reacts with H2SO4 to form ____________.
Assertion: Carbonic acid is a weak acid.
Reason: It ionised completely in an aqueous solution.
Frothing in Yamuna:
The primary reason behind the formation of the toxic foam is the high phosphate content in the wastewater because of detergents used in dyeing industries, dhobi ghats, and households. Yamuna's pollution level is so bad that parts of it have been labelled 'dead' as there is no oxygen in it for aquatic life to survive.
Predict the pH value of the water of river Yamuna if the reason for froth is the high content of detergents dissolved in it.
The table provides the pH value of four solutions P, Q, R and S.
| Solution | pH value |
| P | 2 |
| Q | 9 |
| R | 5 |
| S | 11 |
Which of the following correctly represents the solutions in increasing order of their hydronium ion concentration?
Which of the following statements is correct about an aqueous solution of an acid and of a base?
- Higher the pH, stronger the acid
- Higher the pH, weaker the acid
- Lower the pH, stronger the base
- Lower the pH, weaker the base
Equal volumes of hydrochloric acid and sodium hydroxide solutions of same concentration are mixed and the pH of the resulting solution is checked with a pH paper. What would be the colour obtained?
Explain the role of pH in our digestive system.
The pH value of neutral solution is ______.
The pH of stomach fluid is ______.
The pH value of acids is ______ than 7.
pH value of human blood is ______.
You are given pure water to test the pH value using pH ______ paper. It shows colour.
Define indicator. Give examples
Write notes on the importance of pH in everyday life.
A solution turns the colour of turmeric to reddish brown. If the same solution is poured on universal indictor, its colour would change to ______.
There are four solutions A, B, C and D with pH values as follow:
| Solution | A | B | C | D |
| pH | 2.0 | 7.0 | 8.0 | 12.0 |
Which solution(s) would liberate hydrogen gas with zinc?
Acid present in tomato is ______.
Mohan has three solutions P, Q and R having a pH of 13, 5 and 2 respectively. Which of the above solutions P, Q or R will react with magnesium to liberate hydrogen gas?
Rohit has solution X, Y and Z that has pH 2, 7 and 13 respectively.
Which solution will liberate ammonia gas when reacted with ammonium chloride?
