GK
ELEMENTS COMPOUNDS SUBSTANCES METALS AND NON METALS
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Iron
|
|
|
Copper
|
|
|
Mercury
|
|
|
Aluminium
|
Detailed explanation-1: -Mercury is used in thermometers, since it is liquid metal which has relatively high coefficient of expansion.
Detailed explanation-2: -Q. Mercury is the only metal found in Liquid state at room temperature. Q. Mercury is used in a thermometer because it on increasing the temperature.
Detailed explanation-3: -Mercury is used in thermometers because It has a high coefficient of expansion so that even a small rise in temperature brings about sufficient expansion which can be detected in the capillary of the calibrated part of the thermometer. Q.
Detailed explanation-4: -Silver. Hint: Thermometer is used to measure the temperatures. So the substance used in the thermometer must have a high coefficient of thermal expansion, it should be sensitive to small temperature change.
Detailed explanation-5: -Mercury is one of the most familiar materials used in liquid thermometers. Other liquids, such as kerosene or ethanol, may also be used in these types of thermometers.