Metamerism.
Answer:-
In this type of Isomerism, the isomers differ in the nature of the alkyl groups attached to the same functional group.Ethers, ketones and secondary amines can represent metamers.
angle of contact.
It is defined as the angle between the tangent to the liquid surface at the point of contact and solid surface inside the liquid is called as angle of contact The value of angle of contact depends upon (i) Nature of solid and liquid in contact (ii) Cleanliness of the surface in contact (iii) Medium above the free surface of liquid
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