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Q105) A white powder is soluble in NH4OH but insoluble in water is [ AFMC 1987]




SOLUTION

AgCl is insoluble in water but soluble in NH3 as [Ag(NH3)2]Cl

Answer: (d)


Q106) Cupellation process is used in the metallurgy of [ BHU 1988]




SOLUTION


Answer: (c)


Q107) Which of the following statements concerning transition elements is false? [ Pb. CET 1988]



SOLUTION

Transition elements have oxidation state ranging from +1 to +6,
Answer:(d)



Q108) While extracting an element from ore, the ore is ground and leached with dil. potassium cyanide solution to form the soluble product potassium argentocyanide. the element is .. [ CBSE PMT 1989]



SOLUTION


Answer: (d)


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