- Trending Categories
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) What is meant by (i) elements (ii) compounds, and (iii) mixtures ?Write down the names of two elements, two compounds and two mixtures.(b) Classify the following into elements, compounds and mixtures :Marble, Air, Gold, Brass, Sand, Diamond, Graphite, Petroleum, Common slat, Sea-water, Chalk
(a) (i) An element is a substance that cannot be split up into two or more simpler substances by chemical methods. It contains only one type of atom. Examples of elements: Nonmetals: Carbon and oxygen.
Metals: Aluminum, iron, copper, gold, mercury, and lead.
(ii) A compound is a substance consisting of two or more elements combined chemically in a fixed proportion by mass.
Examples: Water, sodium chloride, calcium carbonate etc.
(iii) A mixture is a substance that is made up of two or more different kinds of particles or two or more pure substances mixed together by a physical process. Examples: Air, milk, wood, soil etc.
(b) Elements: Gold and Diamond
Compounds: Common salt and marble
Mixtures: Brass and seawater.
Updated on: 19-Jan-2023
8 Views
Advertisements