[" Name two metals (other than zinc and iron) which can dispace ny did gen rifort differe hydrach "],[" hat is the action of water on (a) sodium (b) magnesium,and ( "c" ) aluminium? Write equal,"],[" emical reactions involved."]

What is the action of water on (a) sodium (b) magnesium, and (c) aluminium? Write equations of the chemical reaction involved.

(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 two metals which are found in free state in nature. (b) What chemical process is used for extracting a metal from its oxide ore? Name one metal which is extracted by this method. (c) Describe the extraction of zinc metal from its sulphide ore as well as its carbonate ore. Write equations of all the reactions involved.

(a) Name the reaction which is usually sued in the conversion of vegetable oils to fats. Explain the reaction involved in detail .Write a chemical equation to illustrate your answer (b) What is saponification? Write the chemical equation of the reaction involved in this process. Name all the substances which take part in this process and also those which are formed. (c ) Why does micelle formation take place when soap is added to water ? will a micelle be formed in other solvents like ethanol also?

(a). What are metals? Name five metals (b). Name a metal which is so soft that it can be cut with a knife. (c). Name the metal which is the best conductor of heat and electricity. (d). What happens when a metal reacts with dilute hydrochloric acid? Explain with the help of an example. (e). Write the equations for the reactions of : (i). Magnesium with dilute hydrochloric acid. (ii). Aluminimum with dilute hydrochloric acid. (iii). Zinc with dilute hydrochloric acid (iv). Iron with dilute hydrocloric acid. Name the products formed in each case, also indicate the physical states of all the substances involved.

(i) Name the gas which is liberated when an acid reacts with a metal. How will you test the presence of the gas. (ii) Write the chemical equations for the reaction for zinc metal with : (a) Hydrogen acid and (b) Sodium hydroxide Write the chemical name of salt obtained in each case.

(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.