11 Questions
What is the definition of a chemical reaction?
Transformation into substances with distinct properties
During a chemical reaction, what occurs with the atoms of the reacting substances?
They break chemical bonds and rearrange to form new substances
What force holds the atoms of a molecule together in a compound?
Chemical bond
Which of the following is NOT an example of a characteristic of a chemical reaction?
Change in temperature
In a chemical reaction, what happens to the bonds between atoms of the reacting substances?
They break
What is the role of a catalyst in a chemical reaction?
Increases or decreases the rate of reaction without undergoing any chemical change
In the context of chemical reactions, what is a negative catalyst?
A substance that decreases the rate of reaction
When hydrogen sulfide gas reacts with chlorine gas, what is the resulting product?
Sulphur
How does light influence some chemical reactions?
Can initiate reactions in certain cases
Which substance is commonly used as a positive catalyst in the production of ammonia?
Iron
What is the product when lead nitrate is heated?
Lead monoxide
Get expert solutions for Chapter 6 - Chemical Reactions from the Selina textbook for ICSE Class 8 Chemistry students. The solutions cover fundamental topics presented in a simple language to help students understand the concepts better and excel in their examinations.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
