Related Questions

3/4th of square were taken to form shape A and the rest was made to form shape B. Shape A was divided into four equal squares (Shape C), what will be the ratio of the one shape C to one shape B.
A 1:4
B 3:16
C 1:2
D 3:4
Capillary rise of mercury in a small diameter tube is proportional of (where, d = mercury of the rube, σ = surface tension of mercury)
A d
B 1/d
C σ
D 1/σ
Why do water droplets always take a round shape when dropped onto plane surfaces?
A Due to gravity
B Due to atmospheric pressure
C Due to the presence of Eddy current in the air
D Due to exertion of surface tension by the molecules
Capillary rise of mercury in a small diameter tube is proportional to (where, d = diameter of the tube, σ = surface tension of mercury)
A d
B $$\frac{1}{{\text{d}}}$$
C $$\sigma $$
D $$\frac{l}{\sigma }$$
Working principle of mercury in glass thermometer is based on the __________ of mercury with increase in temperature.
A Increase of pressure
B Increase of thermal conductivity
C Volumetric expansion
D Differential linear expansion
Pressure difference between two points in vessels, pipelines or in two different pipelines can be measured by a differential manometer. The pressure difference measured as the mm of water coloumn in case of mercury-water, differential manometer is equal to (where, H = difference in height of mercury column in mm).
A H
B 12.6 H
C 13.6 H
D 14.6 H
Caustic soda is produced in a mercury cell having anode and cathode made respectively of moving mercury and
A Moving mercury and graphite
B Graphite and moving mercury
C Moving mercury and carbon
D Moving mercury and crimped steel wire
A mercury thermometer can not be used to measure the temperature below the freezing point of mercury, which is __________ °C.
A -38.9
B -11.9
C -60.9
D -80.9
Mercury thermometer is commonly used for low temperature measruement. The freezing point and boiling point of mercury are respectively __________ °C.
A - 39 and 350
B - 51 and 439
C - 79 and 395
D - 10 and 425
On a clean glass plate a drop of water spreads to form a thin layer whereas a drop of mercury remains almost spherical because:
A mercury is a metal.
B density of mercury is greater than that of water.
C cohesion of mercury is greater than its adhesion with glass.
D cohesion of water is greater than its adhesion with glass.

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