Questions

Europe from Asia are separated by Ural mountains.

All India Kisan Sabha was founded in Lucknow in 1936. Swami Sahajanand Saraswati was elected as its first President.

 Protein cantaining foods are the major source of dietary sulfur. Foods like eggs are rich in sulfur content.

Mixed economy is the most common economic system in the world.

An atom is the smallest particle of a substance. Chemical substances are divided into two major groups. They are

1. Pure Substances (and)

2. Mixtures.

There are two types of pure substances that are Elements and Compounds.

Elements : An element is a substance that is made up of only one kind of atoms and cannot be broken down into simpler substances by chemical means. Metals and Non- metals come under elements.

Examples of elements are Iron, Silver, Gold, Mercury etc.

Compounds : A Compound is a substance that is formed when two or more elements combine chemically.

Examples of compounds are Water, Carbon dioxide, methane, vinegar etc.

Mixtures : A Mixture is formed when two or more substances mixed together but not chemically combined.

Example: Air.