![Trending Articles on Technical and Non Technical topics](/images/trending_categories.jpeg)
Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
(a) Why are decomposition reactions called the opposite of combination reactions? Explain with equations of these reactions.
(b) Express the following facts in the form of a balanced chemical equation:
"When a strip of copper metal is placed in a solution of solver nitrate, metallic silver is precipitated and a solution containing copper nitrate is formed.
"
(a) Decomposition reactions: The reactions in which a compound splits up into two or more simpler substances when energy is provided to it is known as decomposition reactions.
Example: When calcium carbonate is heated, it decomposes to give calcium oxide and carbon dioxide.
$CaCO_{3}\xrightarrow{Heat} CaO+CO_{2}$
Decomposition reactions are called opposite of combination reactions because, in a combination reaction, two or more substances combine with the release of energy to form a single substance.
Example: Carbon combines with oxygen to produce carbon dioxide and energy is released in this process.
$C\ ( s) \ +\ O_{2} \ ( g) \ \rightarrow \ CO_{2} \ +\ Heat$
(b) When a strip of copper metal is placed in a solution of silver nitrate, metallic silver is precipitated and a solution containing copper nitrate is formed
$Cu\ ( s) \ +\ 2AgNO_{3} \ ( aq) \ \ \rightarrow Cu( NO_{3})_{2} \ ( aq) \ +\ 2Ag\ ( s)$
Advertisements