Explain the following :
Dissociation of `H_(2)S` is suppressed in acidic medium.

The dissociation of CaCO_(3) is suppressed at high pressure

Explain the term degree of dissociation.

(a) Draw the structures of the following molecules : (i) N_(2)O_(5) (ii) HCIO_(4) (b) Explain the following observations : (i) H_(2)S is more acidic than H_(2)O . (ii)Fluorine does not exhibit any positive oxidation state . (iii) Helium forms no real chemical compound.

Balance the following equation by oxidation number method in acidic medium. Cr_(2)O_(7)^(2-)+Fe^(2+)+H^(+)toCr^(3-)+Fe^(3+)+H_(2)O

Balance the following equation by ion electron method in the acidic medium. Cr_(2)O_(7)^(2-)+C_(2)O_(4)^(2-)+H^(+)toCr^(3+)+CO_(2)+H_(2)O

Which of the following is not precipitate by H_(2)S in presence of cone acid soln

Hydrogen peroxide acts both as an oxidising and as a reducing agent depending upon the nature of the reacting species. In which of the following cases H_(2)O_(2) acts as a reducing agent in acid medium ?

Weak acids dissociate partially in aqueous medium. If any common ion is present in the solution, the degree of dissociation of the acid is suppressed however the dissociation constant value remains constant. In which of the following the degree of dissociation of water is maximum '?

The total number of Faradays required to oxidize the following separately : a. 1 mol of S_(2)O_(3)^(2-) in acid medium b. 1 Equivalent of S_(2)O_(3)^(2-) in acid medium

In qualitative analysis. Explain why The cations of group II are precipitated , in acidic medium while those of group IV in alkaline medium.