When water is added to oleum the acid formed is

What would you observe in the following case ? Water is added to the product formed, when aluminium is burnt in a jar of nitrogen gas.

Explain the following giving suitable reasons: In the manufacture of H_2SO_4 by contact process: For the dilution of sulphuric acid, water is not added to the acid but acid is added to water.

When excess sodium thiosulphate is added to AgBr, the product formed is

When water is added to a living cell, the following is not observed.

When cyclohexane is added to water

When excess of SnCl_(2) is added to HgCl_(2) , the substance formed is

Oleum is

Name the law or principle confirmed by the following observations : When water is added to 0*01 M aqueous solution of acetic acid the number of hydrogen ions increases. ""^(**"**)

When dilute nitric acid is added to copper turning, the gas evolved is

Oleum is considered as a solution of SO_(3) in H_(2)SO_(4) , which is obtained by passing SO_(3) in solution of H_(2)SO_(4) When 100 g sample of oleum is diluted with desired mass of H_(2)O then the total mass of H_(2)SO_(4) obtained after dilution is known is known as % labelling in oleum. For example, a oleum bottle labelled as ' 109% H_(2)SO_(4) ' means the 109 g total mass of pure H_(2)SO_(4) will be formed when 100 g of oleum is diluted by 9 g of H_(2)O which combines with all the free SO_(3) present in oleum to form H_(2)SO_(4) as SO_(3)+H_(2)O to H_(2)SO_(4) 9.0 g water is added into oleum sample lablled as "112%" H_(2)SO_(4) then the amount of free SO_(3) remaining in the solution is : (STP=1 atm and 273 K)