(a). Name two metals which occur in natu...

(a). Name two metals which occur in nature in free state as well as in combined state.
(b). Name one ore of manganese. Which compound of manganese is present in this ore? Also write, its chemical formula.
(c) A zinc ore on heating in air forms sulphur dioxide. Describe briefly any two stages involved int eh conversion of this concentrated ore into zinc metal.

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(a) Copper and silver

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Name the process that is used to concentrate sulphide ore. Describe briefly two stages that are involved in the conversion of concnetrated sulphide ore into corresponding metal.

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(a) Define the terms (i) mineral (ii) ore and (iii) gangue. (b) What is meant by the concentration of ore? (c) Name one ore of copper (other than cuprite).White compound of copper is present in this ore? Also, write its chemical formula.

(a) Which metal is extracted from bauxite ore? (b) Give the name of one ore of iron. Which iron compound is preent in this ore? Write its chemical formula. (c). Describe the extraction of zinc metal from its sulphide ore (zinc blende). Write equations of the reactions involved. (d) Explain why, the galvanised iron article is protected against rusting even if the zinc layer is broken. (e) name a common metal which is highly resistant to corrosion.

(a) Name the metal which is extracted from the ore called 'rock salt' (b) name two ores of zinc. Write the names of the chemical compounds present in them and give their chemical formulae. (c) Explain how, mercury is extracted from its sulphide ore (cinnabar). give equations of the reactions involved. (d) In the electrolytic refining of a metal M, what would you take as anode, cathode and electrolyte? (e). Name any five metals which are purified by electrolytic refining method.

(a) Which metal is extracted from calamine ore? (b) Name one ore of mercury. Which mercury compound is present in this ore? Write its chemical formula. (c) How is copper extracted from its sulphide ore (coope glance), Cu_(2)S ? Explain with equations of the reactions involved. (d). What is an alloy? Give two examples of alloys. (e) How are the properties of an alloy different from those of the constitutent elements?

(a) What is the difference betwee a mineral and an ore? (b) Which metal is extracted from cinnabar ore? (c) Name one ore of sodium. Name the sodium compound present in this ore and write its chemical formula. (d) How is sodium metal extracted? Explain with the help of equation of the reaction involved. (e) Name three other metals which are extracted in a manner similar to sodium.

(a) Name the metal which is extracted from haematite ore. (b) name one ore of aluminium. Name the aluminium compound present in this ore and write its chemical formula. (c) How is aluminium metal extracted? Explain with the help of an equation. (d) name the electrode at which aluminium metal is produced. (e) Which gas is produced during the extraction of aluminium? at which electrode is this gas produced?

LAKHMIR SINGH & MANJIT KAUR-METALS AND NON-METALS-Exercise

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Explain how, a reduction reaction fo aluminium can be used for welding...
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What is meant by 'rusting' ? With labelled diagrams, describe an activ...
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(a). Name two metals which are found in nature mainly in the free stat...
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(a) Name the metal which is extracted from haematite ore. (b) Name o...
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