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Q9) In the aluminino-thermite process, Al acts as a/an... [ IIT 1983]




SOLUTION

Al take out oxygen from Fe2O3
Answer: (c)


Q10) Which of the following reaction ill not give an anhydrous AlCl3 .. [ kerla PMT 1998]




SOLUTION

On heating AlCl3 . 6H2O hydrolysis takes place to produce Al(OH)3 and HCl
and on further heating Al(OH)3 converts to Al2O3
Answer: (a)


Q11) The chemical formula of bauxite is [ Pb CET 1990]



SOLUTION


Answer:(b)



Q12) An example of alum is .. [ Haryana CEET 1991]



SOLUTION


Answer: (c)


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