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CBSE Notes 2011-2012 » XI-Chemistry

Some Basic Concepts of Chemistry

Define an element.

Short answer question

Define an element.

Define compound and give two examples.

Short answer question

Define compound and give two examples.

What are mixtures ? Give an example.

Short answer question

What are mixtures ? Give an example.

Calculate the sum of 7.21, 10.245, 0.0548 in terms of significant figure.

Short answer question

Calculate the sum of 7.21, 10.245, 0.0548 in terms of significant figure.

What is the S.I. unit of energy ?

Short answer question

What is the S.I. unit of energy ?

Express 5.607892 to four significant figures and write the result in standard form.

Short answer question

Express 5.607892 to four significant figures and write the result in standard form.

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