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FULL MARKS-PERIODIC CLASSIFICATION OF ELEMENTS -ADDITIONAL QUESTION SOLVED - State whether true or false . If false , give the correct statement .
- In a period , the metallic character of the element increases while th...
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- The last element authenticated by IUPAC is Cn 112 [Copernuicium] .
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- Silver was the first metal to be used in making utensils and weapons
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- The strategic metals such as copper , silver and gold are used in the ...
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- Copper , silver and gold are called coinage metals .
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- For making ornament 24 carat gold is used which is pure gold
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- The mineral form which a metal can be readily and economically exterac...
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- The rocky impurity associated with the ore is called flux .
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- Slag is the fusible product formed when flux reacts with gangue during...
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- Metals which have high chemical reactivity are found in free state or ...
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- Aluminium is the metal found most abundantly in the earth 's crust.
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- Aluminium is a reddish brown metal and it is a bad conductor of heat a...
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- Aluminium reacts with strong causitc alkalis forming aluminates .
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- Conc. Nitric acid render aluminium active due to the formation of ntir...
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- Aluminium is a powerful reducing agent
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- Duralumin alloy is light , having high tensile strength and corrosion ...
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- Fe and Al(2)O(3) is used in the thermite welding
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- The chief ore of copper is Ruby Copper
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- Iron is a lustrous greyish white metal and can be magnetised.
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- The rust has the chemical formula as Fe(3)O(4)
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