Take Class 10 Tuition from the Best Tutors
Affordable fees 1-1 or Group class Flexible Timings Verified Tutors Search in
Assertion (A) : Following is a balanced chemical equation for the action of steam on iron : 3Fe + 4H2O → Fe3O4 + 4H2
Reason (R): The law of conservation of mass holds good for a chemical equation.
Asked by Aditya Kumar Srivastava Last Modified
Answer 
The correct option is A
Both (A) and (R) are true and (R) is the correct explanation of the assertion (A).
Here the number of moles of atoms on both sides (reactant and product) is the same.
Therefore, the chemical equation is balanced.
Thus the assertion is true.
Law of conservation of mass states that mass can neither be created nor be destroyed, it can only be transformed from one form to another in a chemical reaction.
Here in the reaction, the number of moles of atoms on both sides (reactant and product) is the same.
Thus the reason is also true and is the correct explanation for the assertion.
read less
Dr Nandhini J V R
Dentist with tutoring experience of 10 years for Class 6-12 CBSE and State board students
Both (A) and (R) are true and (R) is the correct explanation of the assertion.
Explanation for assertion:-
When iron reacts with steam the products that are formed are Iron (II, III) oxide and hydrogen gas.Here the number of moles of atoms on both sides (reactant and product) is the same.Therefore, the chemical equation is balanced.Thus the assertion is true.
Explanation for reason:-
Law of conservation of mass states that mass can neither be created nor be destroyed, it can only be transformed from one form to another in a chemical reaction.Thus for a chemical equation to obey the law of conservation of mass, it has to be balanced.Here in the reaction, the number of moles of atoms on both sides (reactant and product) is the same.
Therefore, the mass of the reactants is the same as the mass of the products.
Thus law of conservation of mass holds good for a chemical equation.
Thus the reason is also true and is the correct explanation for the assertion.
read less
Both assertion(A) and reason(R) are correct and assertion is the correct explanation for reason.
Iron metal(Reactive Metal)displaces hydrogen from water leading to the formation of iron(III) oxide(solid precipitates) and the liberation of hydrogen gas, the reaction takes place for a long duration.
The formation of iron oxide from iron and water is called the rusting of iron.
The brown color layer that forms on the iron is iron oxide.
The law of conservation of mass states that in a chemical reaction mass is neither created nor destroyed holds true for this equation.
read less
Explanation for assertion:-
When iron reacts with steam the products that are formed are Iron (II, III) oxide and hydrogen gas.
The complete reaction
Here the number of moles of atoms on both sides (reactant and product) is the same.
Therefore, the chemical equation is balanced.
Thus the assertion is true.
Explanation for reason:-
Law of conservation of mass states that mass can neither be created nor be destroyed, it can only be transformed from one form to another in a chemical reaction.
Thus for a chemical equation to obey the law of conservation of mass, it has to be balanced.
Here in the reaction, the number of moles of atoms on both sides (reactant and product) is th
e same.
read lessView 55 more Answers
Related Questions
Now ask question in any of the 1000+ Categories, and get Answers from Tutors and Trainers on UrbanPro.com
Ask a QuestionRelated Lessons
Recommended Articles
Meet Sandhya R, a B.Sc tutor from Bangalore
Sandhya is a proactive educationalist. She conducts classes for CBSE, PUC, ICSE, I.B. and IGCSE. Having a 6-year experience in teaching, she connects with her students and provides tutoring as per their understanding. She mentors her students personally and strives them to achieve their goals with ease. Being an enthusiastic...
Read full article >
Meet Raghunandan.G.H, a B. Tech Tutor from...
Raghunandan is a passionate teacher with a decade of teaching experience. Being a skilled trainer with extensive knowledge, he provides high-quality BTech, Class 10 and Class 12 tuition classes. His methods of teaching with real-time examples makes difficult topics simple to understand. He explains every concept in-detail...
Read full article >
Meet Mohammad Wazid, a skilled trainer for...
Mohammad Wazid is a certified professional tutor for class 11 students. He has 6 years of teaching experience which he couples with an energetic attitude and a vision of making any subject easy for the students. Over the years he has developed skills with a capability of understanding the requirements of the students. This...
Read full article >
Quest Academy - Institute of the month
Quest Academy is a professional Bangalore based NEET and JEE (Main + Advanced) training institute. The academy was incorporated in 2015 to cater to the needs of students, who aim to crack competitive exams by connecting with the best brains around. The institute helps students enhance their skills and capabilities through...
Read full article >
Looking for Class 10 Tuition ?
Learn from the Best Tutors on UrbanPro
Are you a Tutor or Training Institute?
Join UrbanPro Today to find students near youThe best tutors for Class 10 Tuition Classes are on UrbanPro
The best Tutors for Class 10 Tuition Classes are on UrbanPro
5
