[91]
Match the columns

Matrix:

Column I

Column II
(a)
Fluids
(i)
Pressure
(b)
Pascal’s law
(ii)
Liquids and gases
(c)
Lactometer
(iii)
Liquids
(d)
Hydrometer
(iv)
Milk

a-iv; b-ii; c-i; d-iii
a-ii; b-i; c-iv; d-iii
a-iv; b-ii; c-iii; d-i
a-i; b-ii; c-iii; d-iv

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Detailed Solution

The correct answer is option 2.
i) Fluid is a liquid, gas, or material that cannot resist tangential force.
ii) Pascal's law states that the pressure is transmitted equally in all directions when an external force is applied at any point in a fluid container.
iii) Lactometer is a device which checks the density of the milk, which further helps in checking the purity of the milk
iv) The hydrometer is a device used to measure any fluid's density or relative density. This device works on the principle of flotation and is also used to test the purity of the water.
Matrix: