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CBSE Notes 2011-2012 » XII-Chemistry-Term1

General Principles & Processes of Isolation of Elements

Define an ore and a mineral.

Short answer question

Define an ore and a mineral.

By allowing crushed ore to flow in a current of water, the lighter impurities are washed away. Name ...

Short answer question

By allowing crushed ore to flow in a current of water, the lighter impurities are washed away. Name the process.

Give formula of (i) Haematite, (ii) Magnetite.

Short answer question

Give formula of (i) Haematite, (ii) Magnetite.

What is the principle of separation of metal ions in qualitative analysis ?

Short answer question

What is the principle of separation of metal ions in qualitative analysis ?

Name the ions which form black ppt. when H2S is passed through acidified solution of salt.

Short answer question

Name the ions which form black ppt. when H2S is passed through acidified solution of salt.

Name the process in which a particular mineral is dissolved selectively by using acids, bases or oth...

Short answer question

Name the process in which a particular mineral is dissolved selectively by using acids, bases or
other reagents.

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