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  2. Glossary of chemistry terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_chemistry_terms

    Also acid ionization constant or acidity constant. A quantitative measure of the strength of an acid in solution expressed as an equilibrium constant for a chemical dissociation reaction in the context of acid-base reactions. It is often given as its base-10 cologarithm, p K a. acid–base extraction A chemical reaction in which chemical species are separated from other acids and bases. acid ...

  3. Agreement (linguistics) - Wikipedia

    en.wikipedia.org/wiki/Agreement_(linguistics)

    This is because English grammar requires that the verb and its subject agree in person. The pronouns I and he are first and third person respectively, as are the verb forms am and is. The verb form must be selected so that it has the same person as the subject in contrast to notional agreement, which is based on meaning. [2] [3]

  4. Part of speech - Wikipedia

    en.wikipedia.org/wiki/Part_of_speech

    By contrast, Japanese pronouns are an open class and nouns become used as pronouns with some frequency; a recent example is jibun (自分, self), now used by some as a first-person pronoun. The status of Japanese pronouns as a distinct class is disputed, however, with some considering it only a use of nouns, not a distinct class.

  5. English pronouns - Wikipedia

    en.wikipedia.org/wiki/English_pronouns

    The English pronouns form a relatively small category of words in Modern English whose primary semantic function is that of a pro-form for a noun phrase. [1] Traditional grammars consider them to be a distinct part of speech, while most modern grammars see them as a subcategory of noun, contrasting with common and proper nouns.

  6. Impersonal verb - Wikipedia

    en.wikipedia.org/wiki/Impersonal_verb

    In linguistics, an impersonal verb is one that has no determinate subject. For example, in the sentence "It rains", rain is an impersonal verb and the pronoun it corresponds to an exophoric referrent. In many languages the verb takes a third person singular inflection and often appears with an expletive subject.

  7. Interrogative word - Wikipedia

    en.wikipedia.org/wiki/Interrogative_word

    Interrogative pronouns in Australian Aboriginal languages are a diverse set of lexical items with functions extending far beyond simply the formation of questions (though this is one of their uses). These pronominal stems are sometimes called ignoratives or epistememes because their broader function is to convey differing degrees of perceptual ...

  8. List of reagents - Wikipedia

    en.wikipedia.org/wiki/List_of_reagents

    is an alkaline solution of potassium permanganate; used in organic chemistry as a qualitative test for the presence of unsaturation, such as double bonds; N-Bromosuccinimide: used in radical substitution and electrophilic addition reactions in organic chemistry. Also acts as a mild oxidizer to oxidize benzylic or allylic alcohols.

  9. Object pronoun - Wikipedia

    en.wikipedia.org/wiki/Object_pronoun

    In linguistics, an object pronoun is a personal pronoun that is used typically as a grammatical object: the direct or indirect object of a verb, or the object of a preposition. Object pronouns contrast with subject pronouns. Object pronouns in English take the objective case, sometimes called the oblique case or object case. [1]