Assertion (A): If the water table is very near to the subgrade of the road, it will ultimately cause cracking of the road surface.

Reason (R): The consistency of the soil will change from plastic to liquid state leading to its volumetric decrease.

both A and R are true and R is the correct explanation of A

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both A and R are true but R is not a correct explanation of A

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A is true but R is false

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A is false but R is true

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Solution

The correct option is C A is true but R is false
(c)
The volume of soil increases from plastic limit to liquid limit. The cracking in soils is due to reduction in bearing capacity and consequent failure and heaving.

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Assertion (A): If the water table is very near to the subgrade of the road, it will ultimately cause cracking of the road surface. Reason (R): The consistency of the soil will change from plastic to liquid state leading to its volumetric decrease.

The correct option is C A is true but R is false(c) The volume of soil increases from plastic limit to liquid limit. The cracking in soils is due to reduction in bearing capacity and consequent failure and heaving.

Assertion (A): If the water table is very near to the subgrade of the road, it will ultimately cause cracking of the road surface.

Reason (R): The consistency of the soil will change from plastic to liquid state leading to its volumetric decrease.

The correct option is C A is true but R is false
(c)
The volume of soil increases from plastic limit to liquid limit. The cracking in soils is due to reduction in bearing capacity and consequent failure and heaving.