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Q329) A reduction in atomic size with increase in atomic number is a characteristic of elements of ..[ AIEEE 2003]




SOLUTION


Answer: (b)


Q330) Colourless solutions of the following four salts are placed separately in four different test tubes and a strip of copper is dipped in each one of these. Which solution will turn blue [ MP PMT 2002]




SOLUTION

Cu is more electropositive than Ag, Cu metal will dissolve in AgNO3 solution giving a blue solution
Answer: (b)


Q331) Zn gives H2 gas with H2SO4 and HCl but not with HNO3 because



SOLUTION


Answer:(d)



Q332) The alloy used as a levelling agent in the production of steel is



SOLUTION

A calculated amount of spiegeleisen (an alloy of Fe, Mn and C) is added during the production of steel
Answer: (d)


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