avoiding double negatives

This is a reaction in which the positive and negative ions of the two substances in solution are mutually interchanged. ..

This is a reaction in which the positive and negative ions of two substances in a solution are mutually interchanged. ..

This is a temporary effect and takes place between two atoms joined by a multiple bond, i.e., a double or triple bond. It occurs at the requirements of the attacking reagent, and involves instantaneous transfer of a shared pair of electrons of the multiple bond to one of the linked atoms...

The nucleophile (Nu - ) attacks the carbonyl carbon from above or below the plane of the carbonyl group leading to a C-Nu bond formation. This is accompanied by heterophilic cleavage of the weaker carbon-oxygen pi-bond. The electron pair of the pi-bond is completely transferred to the oxygen atom...

Neutralisation is a type of double decomposition reaction, in which, the reactants are a base and an acid, and the products are salt and water. The positive charge of the hydrogen ion of the acid, and the negative charge of hydroxyl ions or oxide ions of the base, lose their el..

Haloalkanes can be prepared by the addition of halogen acids (HBr, HCl or HI). In the addition of halogen acids to unsymmetrical alkenes, Markownikoff's rule is followed in which 'the negative part of the attacking reagent attaches itself to the carbon atom carrying lesser number of ..

Anionic Addition Polymerization - An anionic initiator will generate a carbanionic intermediate and thus the polymerization is of anionic addition type. Here the active centre of the propagating species is negatively charged. Hence it occurs easily with monomers containing electron withdr..

When a solute is dissolved in a solvent a solution is formed. During dissolution of a solute in any solvent, a certain amount of heat is either absorbed or evolved. Such heat changes under constant pressure conditions are known as the enthalpy of solution. 'The change in enthalpy when one mole of ..

Zeolites - Zeolites are microporous aluminosilicates of general formula M x / n [AlO 2 ] x [SiO 2 ].mH 2 O and may be considered as open structures of silica in which aluminium has been substituted in a fraction x / (x+y) of the tetrahedral sites. The negative charge of the aluminosilicat..

These two processes will be taking place simultaneously at different rates. In this case, the rate of dissolution is found to be greater than the rate of deposition. Consequently, by the time equilibrium is reached, more of dissolution would have occurred and the solution becomes negatively..