How many following reactions give yellow colour ppt?
1) `K_(2)Cr_(2)O_(7) overset (OH^(-))rightarrow`
2 ) `2(NH_(4))_(2)SnCl_(4)+2S rarr`
3)`Pb(OAc)_(2)+CaOCl_(2)+H_(2)O rarr`
4) `ZnO+NaOH rarr`
5) `AgNO_(3)+Na_(2)SO_(4)rarr`
6) `AgNO_(3)+NaI rarr`

Na_(2)SO_(3)+H_(2)O_(2) rarr Na_(2)SO_(4) +H_(2)O , in reaction

In how many of the following reactions N_(2) gas may be released {:((a) NH_(4)NO_(2) overset(Delta)rarr,(b) (NH_(4))_(2) Cr_(2)O_(7) overset(Delta)rarr,(c) NH_(2)CONH_(2) + HNO_(2) overset(Delta)rarr),((d) NH_(2)CONH_(2) + NaOBr rarr,(e) NH_(3) + Cl_(2) (LR) rarr,(f) NH_(3) + Br_(2) (LR) rarr),((g) NH_(3) + NaOCl rarr,(h) NH_(3) + CaOCl_(2) rarr,(i) Ba(N_(3))_(2) overset(Delta) rarr):}

How many of the following reaction would produce phosphine gas ? (a) PH_(4)Cl+NaOH rarr " " (b) P_(4)+NaOH overset(Delta) rarr ( c) Ca_(3)P_(2)+H_(2)O rarr " " (d)H_(3)PO_(3) overset(Delta) rarr (e ) PCl_(5)+H_(2)SO_(4) rarr " " (f) H_(3)PO_(2) overset(Delta) rarr (g) P_(2)Cl_(4)+H_(2)O rarr " " (h) AlP+H_(2)O overset( Delta) rarr (i) P_(4)O_(10)+H_(2)O rarr

How many of the following show(s) disproportionation reaction ? (a) XeF_(4)+H_(2)O rarr (b) XeF_(2)+H_(2)O rarr ( c) Na_(2)S_(2)O_(3).5H_(2)O overset(Delta) rarr (d) P_(4)+NaOH+H_(2)O rarr (e ) F_(2)+NaOH rarr (g) Cl_(2)+ " cold/dilute " NaOH rarr (h) HOCl overset(Delta) rarr (i) NO_(2)+NaOH rarr (j) Zn+ NaOH rarr [If your answer is 2 then write the answer as 0002.]

Balance the following chemical equations. (i) HNO_(3) + Ca(OH)_(2) rarr Ca(NO_(3))_(2) + H_(2)O (ii) NaOH + H_(2)SO_(4) rarr Na_(2)SO_(4) + H_(2)O (iii) NaCl + AgNO_(3) rarrAgCl +NaNO_(3) (iv) BaCl_(2)+H_(2)SO_(4) rarr BaSO_(4) + HCl

How many of the following will give O_(2) on heating ? KMnO_(4),K_(2)Cr_(2)O_(7),ZnO,Na_(2)O, PbO_(2),Pb_(3)O_(4),Pb(NO_(3))_(2),NH_(4)NO_(3)

Which hydrolysis reaction is not correct? (A) CaH_(2)+2H_(2)O rarr Ca(OH)_(2)+2H_(2) (B) CaC_(2)+2H_(2)O rarr Ca(OH)_(2)+C_(2)H_(4) (C) AlN+3H_(2)O rarr Al(OH)_(3)+NH_(3) (D) Ca_(3)P_(2)+6H_(2)O rarr Ca(OH)_(2)+2PH_(3)

Select the nature or type of redox change in the following reactions: (a) 2Cu^(+)rarrCu^(2+)+Cu^(0) (b) Cl_(2)rarrClO^(-)+Cl^(-) (c ) 2KClO_(3)overset(Delta)rarr2KCl+3O_(2) (d) (NH_(4))_(2)Cr_(2)O_(7)rarrN_(2)+Cr_(2)O_(3)+4H_(2)O (e ) 10FeSO_(4)+2KMnO_(4)+8H_(2)SO_(4)rarrK_(2)SO_(4)rarr2MnSO_(4)+5Fe_(2)(SO_(4))_(3)+K_(2)SO_(4)+8H_(2)O (f) 5H_(2)C_(2)O_(4)+2KMnO_(4)+3H_(2)SO_(4)rarrK_(2)SO_(4)+2MnSO_(4)+10CO_(2)+8H_(2)O