If the length of a hydrocarbon radical in molecule of surface-active substance is increases, describe, which of the following statements will be correct Select one: a. surface tension increases b. surface activity reduces c. surface tension decreases d. adsorption increases e. adsorption decreases O f. hydrophylic properties become stronger

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The best explanation for the fact that diamond is extremely hard is that diamond crystals A. are made up of atoms that are intrinsically hard because of their electronic structures B. consist of positive and negative ions that are strongly attracted to each other C. are giant molecules in which each atom forms strong covalent bonds with all of its neighboring atoms are formed under extreme conditions of temperature and pressure D.