Explain why the melting point of a substance gives an indication of the purity of a substance.

why is melting point of LiCI lower than NaCI ?

Why are ethers highly inflammale substances ?

Why the reactions involving covalent substances are slow?

Why do some substance exist as solids?

Why do we need pure substances ?

Explain ferromagnetic and diamagnetic substances.

Give one word for the following : The process of fonnation of a solid substance by mixing the solutions of substances

The decreases in the freezing point of an aqueoues solution of a substance is 1.395K and that in the freezing point of benzene solution of the same substance is 1.280K . Explain the difference in DeltaT . The substance:

Which of the following substance gives a positively charged sol?