5. The cross-section areas of the limbs of U-tube are 0.4 cm2 and 0.5 cm2
. The U-tube was half filled with
mercury of relative density 13.6. A liquid was poured in to the larger limb to make the mercury column
in the smaller limb to rise by 3 cm. If the volume of the liquid poured is 5 cm3
, what is the relative
density of this liquid?
(1) 5.5 (2) 6.2 (3) 7.3
(4) 8.5 (5) 9.2

the temperature and the pressure affect solubility. temperature affects by changing the properties of the solvent. the increase in pressure increases solubility, the decrease in pressure decreases solubility.

answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.