pure and applied chemistry

The intantaneous applied voltage = E = Eq sin co t The instantaneous current = / = / 0 sin co/ + I The instantaneous power = P = EI = E 0 1 0 sin co t sin + E 0 Iq = E 0 1 0 sin cof cos cor = sin 2co t t ? t sin 2co? dt ..

The study of the boundary separating two bulk phases is called surface chemistry. This boundary is also known as boundary surface or interface. It is expressed either by a hyphen or a straight vertical line. viz. solid-liquid or solid/liquid indicates the interface between two phases so..

(i) Bredig's arc method Used to prepare metal sols by striking electric arc between metal electrodes. Metal sols is stabilized by an alkali. (ii) Peptization Conversion of coarse precipitate to colloidal state using peptizing agent. 3. Dialysis Separation of electrolyte impurities from co..

10 electrons Si to Pb is small. of Ge and Sn and d 10 P 1 electrons of Pb. C > non-metal 3. Metallic Increases down the group. Atomic size increases and IE Si non-metallic property decreases. ' . Ge > metalloid Sn & Pb > metals 4. Melting point ..

1. Caustic Soda (Sodium hydroxide) (i) Manufacture - Nelson cell Electrolyte Brine (conc. NaCl); Anode-graphite rod; cathode-steel; diaphragm separates anode and cathode. Reactions At anode, 2C1" Cl2 + 2e, At cathode, 2H20 + 2e H2 + 20hT Na+ + OH" - NaOH (ii) Uses Manufacture of p..

Scientists had begun to apply their growing knowledge of chemistry to living things, by the beginning of the nineteenth century. They wondered how plants and animals managed to perform the same chemical reactions in their bodies, which if conducted in the laboratory would..

) there exists an equilibrium betwen undissociated electrolyte and ions 29. An electrolyte solution shows a resistance of 40 Q in a conductivity cell where two platinum electrodes each of area 1 square centimeter are separated by 1 centimeter. The speiifu *iMuiu. im:i>-. is (1) 400 "'m"1 (2) 0.0..

CHEMISTRY (New Syllabus) Time : 3 Hours 15 minutes Max. Marks : 90 English Version Instructions : i) The question paper has four pa..

a values 1.77 X 10~ 4 and 1.75 X 10~ 5 respectively. Their acidic strengths are in the approximate ratio (1) 10 : 1 (2) 1 : 10 (3) 3 : 1 (4) 1 : 3 31. A solution contains Mg 2+ ,Zn 2+ ,Na + and Cu 2+ ions. Which ion gets precipitated when H S is passed through an ammonical solution? ..

Cl 2 tube is proportional-to (1) vapour pressure of solvent (2) vapour pressure of solution (3) vapour pressure of solvent and solution (4) lowering of vapour pressure ^ 39. What is the relative lowering of vapour pressure when 12 g of urea is dissolved in 90 g of water (1) 0.025 pascal (2) 0.062 p..