Question

1. Cased based integrated questions: Read the following information and answer the questions based on the information and related studied concepts. *Substance A is a Solid. The same substance melts and freezes at 0*C and boils at 100*C. The vapour form of A causes more burns. Solid A floats on its liquid form. A in its liquid form is called a universal solvent. a.WhatisAandit’s physicalstateat25*C? (1⁄2) b.Why is A at 273 K more effective in cooling than water at the same temperature? (1⁄2) c.Whichhasmore interparticleforce of attraction ?Solidform of Aorinit’s vapour state ? (1⁄2) d.Solid A floats on its own form of liquid . Why ?

Answer 1

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