Class 9 Exam > Class 9 Questions > Assertion a sample of water under study was f...
Start Learning for Free
Assertion a sample of water under study was found at boil at 102 C at normal Reason impurities present in water can alter its boiling and freezing point a Both assertation and reason are correct and reson is the correct explain of assertation b both assertation and reason are correct and reason is not the correct explain of asssertation c Assertation is true but reason is false d vAssertation is false?
Most Upvoted Answer
Assertion a sample of water under study was found at boil at 102 C at ...
**Assertion:**
A sample of water under study was found to boil at 102°C at normal conditions.
**Reason:**
Impurities present in water can alter its boiling and freezing point.
The correct answer is **(a) Both assertion and reason are correct and the reason is the correct explanation of the assertion**.
**Explanation:**
When pure water boils at normal atmospheric pressure, its boiling point is 100°C. However, impurities present in water can alter its boiling point. Here's a detailed explanation:
1. **Boiling Point of Water:**
- The boiling point of a substance is the temperature at which its vapor pressure equals the atmospheric pressure.
- At normal atmospheric pressure, pure water boils at 100°C. This is the point at which the liquid water molecules have enough energy to overcome the attractive forces and escape into the vapor phase.
- However, impurities present in water can affect these attractive forces and, therefore, alter the boiling point of water.
2. **Impurities in Water:**
- Water from natural sources, such as rivers, lakes, or groundwater, often contains impurities.
- These impurities can include dissolved salts, minerals, gases, organic matter, and other substances.
- The presence of impurities in water affects the intermolecular forces between water molecules.
- Impurities can increase the boiling point of water by increasing the strength of the attractive forces between water molecules.
- As a result, it requires more energy (higher temperature) to break these stronger intermolecular forces and reach the boiling point.
3. **Boiling Point Elevation:**
- The increase in the boiling point of a solvent, such as water, due to the presence of solute particles is known as boiling point elevation.
- The extent of boiling point elevation depends on the concentration of the impurities.
- In this case, the impurities present in the water sample have caused the boiling point to increase to 102°C, which is 2°C higher than the boiling point of pure water.
Therefore, both the assertion and the reason are correct. The presence of impurities in water can alter its boiling point, leading to a higher boiling point than that of pure water.
A sample of water under study was found to boil at 102°C at normal conditions.
**Reason:**
Impurities present in water can alter its boiling and freezing point.
The correct answer is **(a) Both assertion and reason are correct and the reason is the correct explanation of the assertion**.
**Explanation:**
When pure water boils at normal atmospheric pressure, its boiling point is 100°C. However, impurities present in water can alter its boiling point. Here's a detailed explanation:
1. **Boiling Point of Water:**
- The boiling point of a substance is the temperature at which its vapor pressure equals the atmospheric pressure.
- At normal atmospheric pressure, pure water boils at 100°C. This is the point at which the liquid water molecules have enough energy to overcome the attractive forces and escape into the vapor phase.
- However, impurities present in water can affect these attractive forces and, therefore, alter the boiling point of water.
2. **Impurities in Water:**
- Water from natural sources, such as rivers, lakes, or groundwater, often contains impurities.
- These impurities can include dissolved salts, minerals, gases, organic matter, and other substances.
- The presence of impurities in water affects the intermolecular forces between water molecules.
- Impurities can increase the boiling point of water by increasing the strength of the attractive forces between water molecules.
- As a result, it requires more energy (higher temperature) to break these stronger intermolecular forces and reach the boiling point.
3. **Boiling Point Elevation:**
- The increase in the boiling point of a solvent, such as water, due to the presence of solute particles is known as boiling point elevation.
- The extent of boiling point elevation depends on the concentration of the impurities.
- In this case, the impurities present in the water sample have caused the boiling point to increase to 102°C, which is 2°C higher than the boiling point of pure water.
Therefore, both the assertion and the reason are correct. The presence of impurities in water can alter its boiling point, leading to a higher boiling point than that of pure water.
Attention Class 9 Students!
To make sure you are not studying endlessly, EduRev has designed Class 9 study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Class 9.
|
Explore Courses for Class 9 exam
|
|
Similar Class 9 Doubts
Top Courses for Class 9View all
Assertion a sample of water under study was found at boil at 102 C at normal Reason impurities present in water can alter its boiling and freezing point a Both assertation and reason are correct and reson is the correct explain of assertation b both assertation and reason are correct and reason is not the correct explain of asssertation c Assertation is true but reason is false d vAssertation is false?
Question Description
Assertion a sample of water under study was found at boil at 102 C at normal Reason impurities present in water can alter its boiling and freezing point a Both assertation and reason are correct and reson is the correct explain of assertation b both assertation and reason are correct and reason is not the correct explain of asssertation c Assertation is true but reason is false d vAssertation is false? for Class 9 2024 is part of Class 9 preparation. The Question and answers have been prepared according to the Class 9 exam syllabus. Information about Assertion a sample of water under study was found at boil at 102 C at normal Reason impurities present in water can alter its boiling and freezing point a Both assertation and reason are correct and reson is the correct explain of assertation b both assertation and reason are correct and reason is not the correct explain of asssertation c Assertation is true but reason is false d vAssertation is false? covers all topics & solutions for Class 9 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Assertion a sample of water under study was found at boil at 102 C at normal Reason impurities present in water can alter its boiling and freezing point a Both assertation and reason are correct and reson is the correct explain of assertation b both assertation and reason are correct and reason is not the correct explain of asssertation c Assertation is true but reason is false d vAssertation is false?.
Assertion a sample of water under study was found at boil at 102 C at normal Reason impurities present in water can alter its boiling and freezing point a Both assertation and reason are correct and reson is the correct explain of assertation b both assertation and reason are correct and reason is not the correct explain of asssertation c Assertation is true but reason is false d vAssertation is false? for Class 9 2024 is part of Class 9 preparation. The Question and answers have been prepared according to the Class 9 exam syllabus. Information about Assertion a sample of water under study was found at boil at 102 C at normal Reason impurities present in water can alter its boiling and freezing point a Both assertation and reason are correct and reson is the correct explain of assertation b both assertation and reason are correct and reason is not the correct explain of asssertation c Assertation is true but reason is false d vAssertation is false? covers all topics & solutions for Class 9 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Assertion a sample of water under study was found at boil at 102 C at normal Reason impurities present in water can alter its boiling and freezing point a Both assertation and reason are correct and reson is the correct explain of assertation b both assertation and reason are correct and reason is not the correct explain of asssertation c Assertation is true but reason is false d vAssertation is false?.
Solutions for Assertion a sample of water under study was found at boil at 102 C at normal Reason impurities present in water can alter its boiling and freezing point a Both assertation and reason are correct and reson is the correct explain of assertation b both assertation and reason are correct and reason is not the correct explain of asssertation c Assertation is true but reason is false d vAssertation is false? in English & in Hindi are available as part of our courses for Class 9.
Download more important topics, notes, lectures and mock test series for Class 9 Exam by signing up for free.
Here you can find the meaning of Assertion a sample of water under study was found at boil at 102 C at normal Reason impurities present in water can alter its boiling and freezing point a Both assertation and reason are correct and reson is the correct explain of assertation b both assertation and reason are correct and reason is not the correct explain of asssertation c Assertation is true but reason is false d vAssertation is false? defined & explained in the simplest way possible. Besides giving the explanation of
Assertion a sample of water under study was found at boil at 102 C at normal Reason impurities present in water can alter its boiling and freezing point a Both assertation and reason are correct and reson is the correct explain of assertation b both assertation and reason are correct and reason is not the correct explain of asssertation c Assertation is true but reason is false d vAssertation is false?, a detailed solution for Assertion a sample of water under study was found at boil at 102 C at normal Reason impurities present in water can alter its boiling and freezing point a Both assertation and reason are correct and reson is the correct explain of assertation b both assertation and reason are correct and reason is not the correct explain of asssertation c Assertation is true but reason is false d vAssertation is false? has been provided alongside types of Assertion a sample of water under study was found at boil at 102 C at normal Reason impurities present in water can alter its boiling and freezing point a Both assertation and reason are correct and reson is the correct explain of assertation b both assertation and reason are correct and reason is not the correct explain of asssertation c Assertation is true but reason is false d vAssertation is false? theory, EduRev gives you an
ample number of questions to practice Assertion a sample of water under study was found at boil at 102 C at normal Reason impurities present in water can alter its boiling and freezing point a Both assertation and reason are correct and reson is the correct explain of assertation b both assertation and reason are correct and reason is not the correct explain of asssertation c Assertation is true but reason is false d vAssertation is false? tests, examples and also practice Class 9 tests.
|
|
Explore Courses for Class 9 exam
|
|
Suggested Free Tests
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup