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Q17) Aluminothermy used for on the spot welding of large iron structure is based upon the fact that .. [ Pb CET 1988]




SOLUTION


Answer: (a)


Q18) Anhydrous AlCl3 is prepared from .. [ MP PMT 1998]




SOLUTION


Answer: (c)


Q19) Alum is not used ... [ CPMT 1992]



SOLUTION


Answer:(b)



Q20) In the electrolysis of aluminium, cryolite is added to ... [ IIT 1986]



SOLUTION


Answer: (d)


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