Q. 315.0( 2 Votes )

(a) What is the atom

Answer :

(a) Atomicity of sulphur is 8. Its formula is S8.(b) Rhombic sulphur, when heated to above 369K, changes to monoclinic sulphur. Monoclinic sulphur, on cooling to below 369 K reverts back to rhombic sulphur.
Rhombic sulphur Monoclinic sulphur(c) Conc. HNO3 oxidises sulphur to sulphuric acid while the former is reduced to NO2.
S(s) + 6HNO3(aq) H2SO4(aq) + 6NO2(g) + 2H2O(l).

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