On heating lead (II) nitrate gives a brown gas " A". The gas " A" on cooling changes to colourless solid "B" . Solid B on heating with NO changes to a blue solid 'C . Identify ' A', 'B' and' C and also write reactions involved and draw the structures of 'B' and 'C' .

(a) When concentrated sulphuric acid was added to an unknown salt present in a test tube a brown gas (A) was evolved. This gas intensified when copper turnings were added to this test tube.On cooling the gas (A) changed into a colourless solid (B). Identify (A) and (B). Writen chemical reactions involved. (b) Drawn structure of XeOF_(4).

(a) When concentrated sulphuric acid was added to an unknown salt present in a test tube a brown gas (A) was evolved . This gas intensified when copper turnings were added to this test tube . On cooling, the gas (A) changed into a colourless solid (B) . (i) Identify (A) and (B). (ii) Write the structures of (A) and (B). (iii) Why does gas (A) change to solid on cooling ? (b) Arrange the following in the decreasing order of their reducing character : HF , HCl , HBr , HI (c) Complete the following reaction : XeF_(4) + SbF_(5) to

(a) When concentrated sulphuric acid was added to an unknown salt present in a test tube a brown gas (A) was evolved . This gas intensified when copper turnings were added to this test tube . On cooling, the gas (A) changed into a colourless solid (B) . (i) Identify (A) and (B). (ii) Write the structures of (A) and (B). (iii) Why does gas (A) change to solid on cooling ? (b) Arrange the following in the decreasing order of their reducing character : HF , HCl , HBr , HI (c) Complete the following reaction : XeF_(4) + SbF_(5) to

Lead nitrate on heating gives A, A on cooling give B, NO with B give C(blue solid). Find oxidation no of N in compound C

Lead nitrate on heating gives A, A on cooling give B, NO with B give C(blue solid). Find oxidation no of N in compound C

When conc. H_(2)SO_(4) was added to an unknown salt present in a test which was heated, a brown gas (A) was evolved. The gas intenstified when copper turning were also added into the test tube. On cooling, the gas (A) changed into a colourless liquid (B). (a) Identify the gases A and B (b) Write equations for the reactions involved.

The orange solid on heating gives a colourless gas and a green solid which can be reduced to metal by aluminium powder. The orange and the green solids are, respectively -

CaCO_3 on heating gives a white solid (A) and a gas (B), (A) on heating with carbon gives a solid (C) and a gas (D), (C) on hydrolysis glves a gas (E) and a solid (F) Identify (A), (B), (C), (D) , (E) and (F) .