if 4 x square-6x-k is exactly divisible by (X-3) then the value of k is
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5. The heating curve of a pure substance ”X” at 1atm is shown below:
(i) What is the freezing point of the substance in K?
(ii) What is the physical state of the substance at 10֯c ,27֯c , 40֯c and 51֯c.
(iii) Why temperature is constant from 10 to 20 Cal heat?
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