Chemistry

W.L.Bragg and W.H.Bragg derived a mathematical relation to determine interatomic distances from X-ray diffraction patterns. The scattering of X-rays by crystals could be considered as…

X-rays are electromagnetic waves of very short wavelength. The wave nature of X-rays is not confirmed by diffraction experiment, because a grating of about 40…

At constant temperature, the dissociation of Phosphorus Pentachloride decreases with increasing pressure. The reaction: PCl5↔ PCl3 + CO2 no. of moles →  1    …

The idea of exchanging electron, x2 (g) + 3y2 (g) → 2xy3 This reaction is known as oxidation reduction reaction, The actual reaction, N2 (g)…

Endothermic reaction: Endothermic reaction is the reaction where heat energy absorbed. CaCO3 (s) →∆→ CaO (s) + CO2 (g) ∆H298K = + 178 Kj mol-1.…

The change of reaction enthalpy is equal to reaction heat at constant pressure At constant temperature, when heat applied to the gas, that heat does…

Radiocarbon Dating method was developed by Willard and Libby to determine the age of wood or animal fossils. This method is based onthe fact that…

Nuclear Reaction Taking Place in Sun (stars) It has been estimated that the sun is giving out energy equally in all possible directions at the…

Uses of Radioactive Isotopes: Radioactive Isotopes are the study of reaction mechanism Mechanism of photosynthesis in plants A small quantity of Radioactive CO2 containing radioactive…

Heterogeneous equilibrium: At a reversible reaction reactants and products have different. phase at equilibrium is called heterogeneous equilibrium. Explain: CaCO3 → CaO (S) CO2 (g)…