Advertisements
Advertisements
प्रश्न
The pH of rainwater is 7.
उत्तर
False.
The pH of rainwater is less than 7.
APPEARS IN
संबंधित प्रश्न
Which one of the following types of medicines is used for treating indigestion?
Fill in the blank
Magnesia is used in making __________.
Answer the following:
If pH value of solution ‘A’ is 8, pH value of solution ‘B’ is 7 and pH value of solution ‘C’ is 5.5 then:
Explain the pH scale with the proper diagram.
A solution 'X' gives orange colour when a drop of it falls on pH paper, while another solution 'Y' gives bluish colour when a drop of it falls on pH paper. What is the nature of both solutions? Determine the pH of solutions 'X' and 'Y'.
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?
Tooth enamel is made up of ____________.
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 ____________.
Which of the following is used for the dissolution of gold?
Which of the following are present in a dilute aqueous solution of hydrochloric acid?
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.
The graph given below depicts a neutralization reaction (acid + alkali → salt + water). The pH of a solution changes as we add an excess acid to an alkali.
Which letter denotes the area of the graph where both acid and salt are present?
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
The pH value of neutral solution is ______.
The pH of stomach fluid is ______.
pH stands for ______ in a solution.
pH value of human blood is ______.
You are given pure water to test the pH value using pH ______ paper. It shows colour.
Correct the wrong statement given below:
An acid is the compound which are capable of forming hydroxyl ions (OH– ) in aqueous solution.
Write notes on the importance of pH in everyday life.
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?
List the role of each of the following in our digestive system:
- Hydrochloric acid
- Trypsin
- Muscular walls of stomach
- Salivary amylase
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?
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?
