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Q265) Which of the following has lowest percentage of carbon [ KCET 2000]




SOLUTION

Wrought is pure form of iron
Answer: (c)


Q266) Which of the following oxides of Cr is amphoteric ..[ harayana CEET 1999]




SOLUTION


Answer: (b)


Q267) A metal which is not affected by concentrated H2SO4, HNO3 or alkalies forms a compound X. this compound X can be used to give a complex which finds its application for toning in photography. the metal is [ DPMT 1999]



SOLUTION

Au is not affected by acids and alkalies. the compound X is AuCl3 which forms a complex with conc. HCl
AuCl3 + HCl → H[AuCl4]
Which is used for toning in photography
Answer:(a)



Q268) Which compound is volatile on heating? [ BHU 1998]



SOLUTION


Answer: (b)


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