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Pseudo halides are anions having resembl...

Pseudo halides are anions having resemblance with halide ions. Group I metals can form salts with pseudo halides. Pseudo halogens can acts as ligands and form coordinate complexes. Their hydrides are weakly acidic and can be prepared in analogous way as halogen hydrides are prepared. Azides, cyanides, selonocyanides are example of pseuda halides.
When NaCN reacts with `H_2SO_4`, the products are:

A

(A) HCN and `Na_2SO_4`

B

(B) HCN and `NaHSO_4`

C

(C) `(CN)_2` and `Na_2SO_4 . H_2O`

D

(D) None of these

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The correct Answer is:
A
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Pseudo halides are anions having resemblance with halide ions. Group I metals can form salts with pseudo halides. Pseudo halogens can acts as ligands and form coordinate complexes. Their hydrides are weakly acidic and can be prepared in analogous way as halogen hydrides are prepared. Azides, cyanides, selonocyanides are example of pseuda halides. (CN)_2 when react with Na metal, the product is:

Pseudo halides are anions having resemblance with halide ions. Group I metals can form salts with pseudo halides. Pseudo halogens can acts as ligands and form coordinate complexes. Their hydrides are weakly acidic and can be prepared in analogous way as halogen hydrides are prepared. Azides, cyanides, selonocyanides are example of pseuda halides. Cyanide, CN^- is a pseudo hafide. When cyanogen is heated with alkali solution, the product are:

The oxides of Cl, Br and I are well known. They have various composition. The oxides are thermally unstable and dangerously explosive. They react with alkali. The bromine oxides are thermally more stable than chlorine oxides. The structure of halogen oxides is explained on the basis of VSEPR theory. The hydrides of chlorine, bromine and iodine can be made by direct synthesis an they are well strongly fuming become increasingly more powerful reducing agents. Halogens also form oxoacids of the form HOX,HXO_(2) ,HXO_(3) " and " HXO_(4) The acidic character of oxoacids and halogen oxides decreases from 'Cl' to 'I', however it increases with increase in oxidation number of halogen in them. Which of the following does not dimerise?