an ore of mercury

The range of mercury thermometer is

A flask of volume 4000 cc is completely filled with mercury at 0^@C . The coefficient of cubical expansion of mercury is 180 xx 10^-6 /@C and that of glass is 40 xx 10^-6/@C . If the flask is now placed in liquid at 80^@C , how much mercury will overflow?

Answer the following questions: Extraction of mercury from its ore cinnabar and write the corresponding chemical reaction .

Write a short note on mercury barometer.

The tube of a mercury barometer is 1 cm in diameter. What correction due to capillarity with effect of meniscus is to be applied to barometer reading if surface tension of mercury is 435.5 dyne/cm and angle of contact of mercury with glass is 140^@ ? (density of mercury = 13600 kg//m^3 )

A capillary tube of radius 0.02 cm is dipped vertically in a beaker containing mercury. The level of mercury in the tube with respect to the mercury level in the beaker will be (Given density of mercury 13.5 g//cc, Surface tension 540 dyne/cm and the angle of contact 135^@ )

Answer the following : Give reasons : Thermometers these days use alcohol instead of mercury .

Give reasons : Why is alcohol used instead of mercury in thermometers these days ?

Calculate the work done in breaking a mercury drop of radius 1mm into one thousand droplets of the same size. Surface tension of mercury is 525 xx 10^-3 N//m .