(a). The water will cool initially till it reaches 00C, the freezing point. At this stage, the temperature will remain constant till all the water will freeze. After this, temperature would fall again.
Question
A glass tumbler containing hot water is kept in the freezer compartment of a refrigerator (temperature <00C). If you could measure the temperature of the content of the tumbler, which of the following graphs would correctly represent the change in its temperature as a function of time?
WhatsApp
💡 Some Related Questions
Mrs. Khanna was making breakfast in kitchen. For this purpose she was heating water in a pan. In the meantime, her 12 years old son, Pappu entered the kitchen and saw the water vapour coming out from the pan. Pretend yourself to be Mrs. Khanna and answer the following questions: (𝒊) What is the process going on in the pan? (𝒊𝒊) Why was this process occurring? (𝒊𝒊𝒊) Give one way by which Pappu can relate this phenomenon with his everyday life. (𝒊𝒗) What values are shown by Pappu?
Open Answer »
The temperature-time graph given alongside shows the heating curve for pure wax. From the graph answer the following: (a) What is the physical state of the substance at the point A, B, C and D? (b) What is the melting point of the substance? (c) What is the boiling point? (d) Which portions of the graph indicates that change to state is taking place? (e) Name the terms used for heat absorbed during change of states involved in above process.
Open Answer » 
You are given the following substances with their melting and bowling points. Identify the physical status of X, Y and Z at room temperature (30°C).
| Substance | Melting point(°C) | Boiling point(°C) |
| X | -219 | -183 |
| Y | 119 | 445 |
| Z | -15 | 78 |
