Advertisements
Advertisements
प्रश्न
Define the terms elements, compounds & mixtures with a view to show their basic difference.
Advertisements
उत्तर
Element is a pure substance.
- It is the basic unit of matter and cannot be broken down into two or simpler substances by any means.
- It is mainly classified into metals, non-metals, metalloids, and noble gases.
The compound is a pure substance.
- It is formed by a combination of two or more elements.
- The elements are combined together in a fixed ratio.
- It can be broken down into its elements by chemical means.
The mixture is an impure substance.
- It is formed by a combination of two or more elements, compounds, or both.
- The substances are mechanically mixed together in any ratio.
APPEARS IN
संबंधित प्रश्न
Give one example for the following types of mixtures :
solid-liquid heterogenous mixture.
Give Two Examples for Each of the Following: Inert Gases
Write the Chemical Name of the Following and Also Give Their Molecular Formulae:
Vinegar
Give two examples of the following.
Non-metals which are solids
Define: Atom
Classify substances into pure and impure substances in the form of a chart or tabulation.
Complete the statement with the correct words.
__________ are chemicals formed on reaction of a base with an _____ giving salt and water.
The diagram represents fractional distillation for the separation of mixtures. Answer the following :
- Can two immiscible liquids be separated by this process?
- Separation of liquids by this process is based on which physical property?
- If methyl alcohol & water are to be separated, which liquid would remain in flask ‘X’ after condensation.
- Give a reason for the above answer.
- State the purpose of the fractionating column in the apparatus.
Differentiate metals and non-metals.
Name the element which is used in toothpaste to strengthen our teeth.
