Chemistry homework of XI

1.Write two significance of chemical equation.
2.Write four limitations of chemical equation.
3.Define any four types of chemical reactions with examples.
4.Distinguish between valency and oxidation number.
5.Justify the statement that oxidation and reduction go side by side.
6. Check whether the following reactions are redox or not ?
i) H2S + Br2  = 2HBr +S
ii) I2  + HNO3  = HIO3  + NO2 + H2O
iii) AgNO3  + NaCl  =  AgCl  +  NaNO3
7.Describe the synthesis of ammonia by Haber's process. Also write four important chemical reactions of ammonia has.
8.State Boyle's and Charle' s law and derive the relationship, PV = nRT , Where the letter's have their usual meanings.
 To be submitted on given time