Category Archives: science

The solids have strong interparticulate forces which bind the particles so close that they can only oscillate about their mean position only.

Like dissolves like. Toluene is a non polar solvent and benzene is also non polar in nature, so it dissolves in toluene. But on the other hand water is a non polar solvent and due to this benzene do not dissolve in it.

solution

(i) ZnS have large difference in the size of their ions and due to this it shows Frankel defect. (ii) AgBr shows Schottky defect and Frankel defect.

In a square close packed two dimensional layer , four other particles touch one particle. Thus its coordination number is 4 .

On heating the crystal lattice, some of the lattice particles gain enough energy that they jump from their lattice points. Due this the crystal appears coloured and its density decreases.

These are the points in a crystal lattice that can be occupied by an atom, ion or a molecule.

In case of solids the particles have strong forces of attractions between them . Due to this they can not move or change their positions. Due to this they are rigid.

It is the foul smell produced by the oxidation of oils and nuts. Mostly the bitter taste of peanut and food made by frying is due to rancidity . Normally the oily substances which are not covered properly , react with the oxygen of air and get oxidised thus give a foul smell. Removal ofContinue reading “What is rancidity ? Why the packets of chips and fries are flushed or filled with nitrogen gas while packing?”

Magnesium is a reactive metal, it reacts with the oxygen of air and forms magnesium oxide. Magnesium oxide makes a layer on the upper surface of the metal. Which makes it difficult for the magnesium to get burnt and give characteristic flame. By using sandpaper we can remove its upper layer for proper combustion reactionContinue reading “Why should a magnesium ribbon should be cleaned before burning in air?”