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Q49) CO2 is gas at room temperature while SiO2 is solid why?




SOLUTION


Answer: (b)


Q50) Pyrosilicate ion is ... {kerala EE 2002]




SOLUTION


Answer: (d)


Q51) The most stable +2 oxidation state is exhibited by ... [ Kerala MEE 2000]



SOLUTION

Due ti inert pair effect Pb shows stable oxidation state
Answer:(c)



Q52) Which of the following is most electronegative? [ CPMT 1999]



SOLUTION

Electronegativity decreases down the group
Answer: (c)


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