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LAKHMIR SINGH & MANJIT KAUR-METALS AND NON-METALS-Exercise
- State two ways to prevent the rusting of iron.
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- What is meant by galvanisation? Why is it done?
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- Name the metal which is used for galvanising iron.
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- Explain why,iron sheets are coatedwith zinc.
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- Why do we apply paint on iron articles?
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- Give reason for the following: Carbonate and sulphide ores are usual...
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- Name a reducing agent that may be used to obtain manganese from mangan...
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- Name an alloy of lead and tin.
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- Give the composition of an alloy called solder. State its one property...
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- what is an amalgam?
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- How many carats is pure gold ? Why is pure gold not suitable for makin...
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- Name one method for the refining of metals.
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- State two conditions for the rusting of iron.
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- In one method of rust prevention, the iron is not coated with anything...
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- Name two allys ofiron.what elements are present in these alloys?
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- Give reason for the following: Silver, gold and platinum are used to...
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- Which metal becomes black in the presence of hydrogen sulphide gas in ...
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- name the gas in air which tarnishes silver articles slowly.
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- Silver metal does not combine easily with oxygen but silver jewellery ...
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- Write the composition of the alloy called bronze. Give two uses of bro...
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