Class 10 Exam > Class 10 Questions > Define a chemical reaction.state four observa...
Start Learning for Free
Define a chemical reaction.state four observations which help us to determine that a chemical reaction has taken place.write one example of each observation with a balanced chemical equation?
Most Upvoted Answer
Define a chemical reaction.state four observations which help us to de...
Chemical Reaction:
Chemical reaction is a process that leads to the transformation of one set of chemical substances to another. It involves the breaking and forming of chemical bonds resulting in the rearrangement of atoms to produce new substances.
Observations indicating a chemical reaction:
- Change in color
- Formation of a precipitate
- Evolution of gas
- Change in temperature
Example of each observation:
1. Change in color: When iron nails are placed in copper sulfate solution, the color of the solution changes from blue to green due to the formation of iron sulfate.
Balanced chemical equation: Fe(s) + CuSO4(aq) → FeSO4(aq) + Cu(s)
2. Formation of a precipitate: Mixing silver nitrate solution with sodium chloride solution results in the formation of a white precipitate of silver chloride.
Balanced chemical equation: AgNO3(aq) + NaCl(aq) → AgCl(s) + NaNO3(aq)
3. Evolution of gas: When hydrochloric acid reacts with calcium carbonate, carbon dioxide gas is evolved which can be observed as bubbles.
Balanced chemical equation: 2HCl(aq) + CaCO3(s) → CaCl2(aq) + CO2(g) + H2O(l)
4. Change in temperature: Mixing citric acid with sodium bicarbonate results in an endothermic reaction, leading to a decrease in temperature.
Balanced chemical equation: H3C6H5O7(aq) + 3NaHCO3(aq) → 3CO2(g) + 3H2O(l) + Na3C6H5O7(aq)
Chemical reaction is a process that leads to the transformation of one set of chemical substances to another. It involves the breaking and forming of chemical bonds resulting in the rearrangement of atoms to produce new substances.
Observations indicating a chemical reaction:
- Change in color
- Formation of a precipitate
- Evolution of gas
- Change in temperature
Example of each observation:
1. Change in color: When iron nails are placed in copper sulfate solution, the color of the solution changes from blue to green due to the formation of iron sulfate.
Balanced chemical equation: Fe(s) + CuSO4(aq) → FeSO4(aq) + Cu(s)
2. Formation of a precipitate: Mixing silver nitrate solution with sodium chloride solution results in the formation of a white precipitate of silver chloride.
Balanced chemical equation: AgNO3(aq) + NaCl(aq) → AgCl(s) + NaNO3(aq)
3. Evolution of gas: When hydrochloric acid reacts with calcium carbonate, carbon dioxide gas is evolved which can be observed as bubbles.
Balanced chemical equation: 2HCl(aq) + CaCO3(s) → CaCl2(aq) + CO2(g) + H2O(l)
4. Change in temperature: Mixing citric acid with sodium bicarbonate results in an endothermic reaction, leading to a decrease in temperature.
Balanced chemical equation: H3C6H5O7(aq) + 3NaHCO3(aq) → 3CO2(g) + 3H2O(l) + Na3C6H5O7(aq)
Attention Class 10 Students!
To make sure you are not studying endlessly, EduRev has designed Class 10 study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Class 10.
|
Explore Courses for Class 10 exam
|
|
Top Courses for Class 10View all
Define a chemical reaction.state four observations which help us to determine that a chemical reaction has taken place.write one example of each observation with a balanced chemical equation?
Question Description
Define a chemical reaction.state four observations which help us to determine that a chemical reaction has taken place.write one example of each observation with a balanced chemical equation? for Class 10 2024 is part of Class 10 preparation. The Question and answers have been prepared according to the Class 10 exam syllabus. Information about Define a chemical reaction.state four observations which help us to determine that a chemical reaction has taken place.write one example of each observation with a balanced chemical equation? covers all topics & solutions for Class 10 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Define a chemical reaction.state four observations which help us to determine that a chemical reaction has taken place.write one example of each observation with a balanced chemical equation?.
Define a chemical reaction.state four observations which help us to determine that a chemical reaction has taken place.write one example of each observation with a balanced chemical equation? for Class 10 2024 is part of Class 10 preparation. The Question and answers have been prepared according to the Class 10 exam syllabus. Information about Define a chemical reaction.state four observations which help us to determine that a chemical reaction has taken place.write one example of each observation with a balanced chemical equation? covers all topics & solutions for Class 10 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Define a chemical reaction.state four observations which help us to determine that a chemical reaction has taken place.write one example of each observation with a balanced chemical equation?.
Solutions for Define a chemical reaction.state four observations which help us to determine that a chemical reaction has taken place.write one example of each observation with a balanced chemical equation? in English & in Hindi are available as part of our courses for Class 10.
Download more important topics, notes, lectures and mock test series for Class 10 Exam by signing up for free.
Here you can find the meaning of Define a chemical reaction.state four observations which help us to determine that a chemical reaction has taken place.write one example of each observation with a balanced chemical equation? defined & explained in the simplest way possible. Besides giving the explanation of
Define a chemical reaction.state four observations which help us to determine that a chemical reaction has taken place.write one example of each observation with a balanced chemical equation?, a detailed solution for Define a chemical reaction.state four observations which help us to determine that a chemical reaction has taken place.write one example of each observation with a balanced chemical equation? has been provided alongside types of Define a chemical reaction.state four observations which help us to determine that a chemical reaction has taken place.write one example of each observation with a balanced chemical equation? theory, EduRev gives you an
ample number of questions to practice Define a chemical reaction.state four observations which help us to determine that a chemical reaction has taken place.write one example of each observation with a balanced chemical equation? tests, examples and also practice Class 10 tests.
|
|
Explore Courses for Class 10 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
|
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup