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Q.6 SHORT ANSWER ( ANY 3 ) [ 6M ] 1. Why do we use mercury in the thermometer in place of water?ans 2. In places of hot climate it is advised that the outer walls of houses be painted white Explain.ans3. Name the source from which litmus solution is obtained. What is the use of this solution? ans4. What are neutral substances?ans |
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Answer» Answer: 1) We use mercury in thermometers as they REMAIN in liquid form even with a change of TEMPERATURE in it. 2. A small change in the temperature CAUSES change in volume of a liquid. 3. Water cannot be used as a thermometric liquid, because it is not HELPFUL to measure below 0°C and above 100°C. 4. Water is transparent. So it makes the reading of the scales of the thermometer more difficult, water wets the glass tube so its steady is glass tube. I hope this will help you. |
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