Question

In a mercury rhermometer the ice point (lower fixed point) is marked as `10^(@)` and the steam point (upper fixed point ) is marked as `130^(@).` At `40^(@)C` tmperature, what will this thermometer read?
A. `78^(@)`
B. `66^(@)`
C. `62^(@)`
D. `58^(@)`

Answer 1

Correct Answer - D
Using `(T_(c)-0)/(100-0)=(T-10)/(130-10)`
`(40-100)/(100-0)=(T-10)/(130-10)`
`" "(40)/(100)=(T-10)/(120)or 2/5=(T-10)/(120)`
`" "5T-50=240rArr5T=290`
`rArr" "T=(290)/5=58^(@)`