Which reaction cannot be used for the preparation of the halogen acid
(A) `2KBr+ Conc.H_(2)SO_(4)rarr`
(B) `NaCl+Conc. H_(2)SO_(4)rarr`
(C) `NaHSO_(4)+NaCl rarr`
(D) `CaF_(2)+H_(2)SO_(4)rarr`

overset("Conc". H_(2)SO_(4))rarr(A)

Give balanced equations for the preparation of the following salts- (i) NaHSO_(4) (ii) CuSO_(4) - using conc. H_(2)SO_(4)

Which combination cannot be used for the preparation of hydrogen gas in the laboratory ? I. Zinc/conc. H_(2)SO_(4) II. Zinc/ HNO_(3) III. Pure zinc/dil. H_(2)SO_(4)

The number of reactions that gives SO_(2) gas : (a) Cu+"conc. "H_(2)SO_(4)rarr (b) Zn +"dil. "H_(2)SO_(4)rarr (c ) S+H_(2)SO_(4)rarrr (d) FeS_(2)+O_(2)rarr (e ) NaHSO_(3)+"dil. "H_(2)SO_(4)rarr (f) H_(2)SO_(4)+PCl_(5)rarr

complete the following equation : (i) c+conc. H_(2)SO_(4)rarr (ii) XeF_(2)+H_(2)Orarr

NaI+H_(2)SO_(4)(Conc.) to Na_(2)SO_(4)+SO_(2)uarr+I_(2)uarr

NaI+H_(2)SO_(4)(Conc.) to Na_(2)SO_(4)+SO_(2)uarr+I_(2)uarr

Anisole with conc. HNO_(3) and conc. H_(2)SO_(4) gives

Anisole with conc. HNO_(3) and conc. H_(2)SO_(4) gives

Identify the product of the given reaction: (a) AgBr + 2Na_(2)S_(2) O_(3) rarr " " (b) H_(2)SO_(4) ("dil") + Na_(2)S_(2)O_(3) rarr " " (c) H_(2)SO_(4) ("conc.") + Na_(2)S_(2)O_(3)