Elements are the______ form of pure substances.

रिक्त स्थान भरें

Elements are the simplest form of pure substances.

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अध्याय 3: Matter Around Us - Evaluation [पृष्ठ ३८]

अध्याय 3 Matter Around Us
Evaluation | Q II. 7. | पृष्ठ ३८

Match the columns.

column A	column B
1. to separate grain from chaff	a. filtration
2. to saparate sawdust from water	b. sedimentation and deeantation
3. to separate iodine from sodium chloride	c. winnowing
4. to separate iron fillings from sand	d.sublimation
5. it is used to separate sand and water	e maganetic separation
	f .handpicking

Is food that we eat a mixture ?

Give one example for the following types of mixtures :

solid-liquid heterogenous mixture.

Give Two Examples for Each of the Following: Non-metals

Write the Chemical Name of the Following and Also Give Their Molecular Formulae:

Vinegar

Give two examples of the following.
Metals which are soft

State the number of atoms of CaCO₃

Find the atomicity of the Following molecule:
Acetic Acid

Fill in the blank
The most abundant element in the atmosphere is _______.

Classify the following as metals, non-metals and metalloids.

Sodium, Bismuth, Silver, Nitrogen, Silicon, Carbon, Chlorine, Iron, Copper