Q1: H₄P₂O₇ is the chemical formula of __________ phosphoric acid.

ANS:A - pyro

Pyro is a prefix commonly used in chemistry to denote compounds or chemical species that involve a condensation or dehydration reaction resulting in the loss of water molecules from a precursor compound. In the context of phosphoric acids, "pyro" refers to compounds formed by the condensation of two molecules of orthophosphoric acid (H3PO4), resulting in the loss of one water molecule (H2O) for each condensation reaction. This condensation reaction leads to the formation of linear chains or cyclic structures composed of phosphate groups. Pyrophosphoric acid, denoted by the chemical formula H4P2O7, is one such compound. It is formed by the condensation of two molecules of orthophosphoric acid, resulting in the loss of one water molecule: 2𝐻3𝑃𝑂4→𝐻4𝑃2𝑂7+𝐻2𝑂2H3​PO4​→H4​P2​O7​+H2​O Pyrophosphoric acid contains two phosphate (PO4) units linked together by an oxygen bridge, resulting in a dimeric structure. It is one of the condensed forms of phosphoric acid, along with metaphosphoric acid and polyphosphoric acid. Pyrophosphoric acid has various applications in industry and chemistry. It is used as a reagent in organic synthesis, as a pH buffer in biochemical assays, and as a precursor in the production of phosphate salts and specialty chemicals. Overall, the prefix "pyro" signifies the formation of compounds through a condensation reaction involving the loss of water molecules, leading to the formation of new chemical species with distinct properties and applications.