The ___________ is a measure of how the viscosity changes with temperature; the higher the index, the smaller is the change in viscosity with temperature.

The ___________ is a measure of how the viscosity changes with tempera

1.	The ___________ is a measure of how the viscosity changes with temperature; the higher the index, the smaller is the change in viscosity with temperature.
A.	Viscosity index
B.	Gravity index
C.	Pulping index
D.	Starch index
Answer» B. Gravity index

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