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प्रश्न
Draw neat and labelled diagram of pH scale.
उत्तर
The range of ph values
APPEARS IN
संबंधित प्रश्न
The pH of rainwater is 7.
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 __________.
Give the tests to identify Acids and Bases.
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.
Tomato is a natural source of which acid?
Which of the following statements is correct about an aqueous solution of an acid and of a base?
(i) Higher the pH, stronger the acid
(ii) Higher the pH, weaker the acid
(iii) Lower the pH, stronger the base
(iv) Lower the pH, weaker the base
What is the pH range of our body?
Rain is called acid rain when it:
Which of the following is used for the dissolution of gold?
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.
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
The pH of the gastric juices released during digestion is
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?
The pH value of neutral solution is ______.
The pH value of acids is ______ than 7.
The white enamel coating of our teeth is ______.
You are given pure water to test the pH value using pH ______ paper. It shows colour.
Define indicator. Give examples
Correct the wrong statement given below:
An acid is the compound which are capable of forming hydroxyl ions (OH– ) in aqueous solution.
Correct the wrong statement given below:
The pH value of the base is lesser than 7.
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 ______.
How does Paramecium obtain is food?
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 liberate ammonia gas when it reacts with ammonium chloride?
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?
