Examlex
Which of the following concepts or phenomena was first and most directly connected to state development?
Bromecresol Purple
A chemical pH indicator that changes color at a pH range of 5.2 to 6.8, used in various laboratory and medical tests.
Adhesion
The tendency of dissimilar particles or surfaces to cling to one another, often causing materials to stick together.
Hydrogen Bonds
Weak bonds between partially positive hydrogen atoms and partially negative elements like oxygen or nitrogen, crucial in biological structures.
pH Scale
A measure of the acidity or basicity of an aqueous solution, ranging from 0 (most acidic) to 14 (most basic) with 7 as neutral.
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