Metal sulphate (A) xrightarrow{text{Heat}} Ox | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) The thermal decomposition of ferrous sulphate $(FeSO_4)$ yields ferric oxide $(Fe_2O_3)$,sulphur trioxide $(SO_3)$,and sulphur dioxide $(SO_2)$.$2

Vedclass · Accepted Answer

$FeSO_4, Fe_2O_3, SO_3, SO_2, Na_2CrO_4$

Vedclass · Answer

(A) The thermal decomposition of ferrous sulphate $(FeSO_4)$ yields ferric oxide $(Fe_2O_3)$,sulphur trioxide $(SO_3)$,and sulphur dioxide $(SO_2)$.$2FeSO_{4(s)} \xrightarrow{\Delta} Fe_2O_{3(s)} + SO_{3(g)} + SO_{2(g)}$Here,$(A) = FeSO_4$,$(B) = Fe_2O_3$,$(C) = SO_3$,and $(D) = SO_2$.$SO_2$ gas acts as a reducing agent and reduces dichromate ions $(Cr_2O_7^{2-})$ in acidic medium to green chromium $(III)$ ions $(Cr^{3+})$.$Cr_2O_7^{2-} + 3SO_2 + 2H^+ \rightarrow 2Cr^{3+} + 3SO_4^{2-} + H_2O$When $Na_2O_2$ (a strong oxidizing agent) is added in excess to the green solution containing $Cr^{3+}$,it oxidizes $Cr^{3+}$ to chromate ions $(CrO_4^{2-})$,which form a yellow solution of $Na_2CrO_4$.$2Cr^{3+} + 3Na_2O_2 + 4NaOH \rightarrow 2Na_2CrO_4 + 2Na^+ + 2H_2O$Thus,$(E) = Na_2CrO_4$.

Column $I$	Column $II$
$(A)$ $Cu + \text{dil } HNO_3$	$(p)$ $NO$
$(B)$ $Cu + \text{conc } HNO_3$	$(q)$ $NO_2$
$(C)$ $Zn + \text{dil } HNO_3$	$(r)$ $N_2O$
$(D)$ $Zn + \text{conc } HNO_3$	$(s)$ $Cu(NO_3)_2$
	$(t)$ $Zn(NO_3)_2$

Metal sulphate $(A) \xrightarrow{\text{Heat}}$ Oxide $(B) +$ Gas $(C) +$ Gas $(D) \xrightarrow{Cr_2O_7^{2-} / H^{+}}$ Green solution $\xrightarrow[\text{Excess}]{Na_2O_2}$ Yellow solution $(E)$. Compound $A, B, C, D$ and $E$ are respectively:

Similar Questions

Which of the following will not change the orange colour of $K_2Cr_2O_7$ into green colour in an acidic medium?

Consider the following redox reaction in basic medium.
$x \ Cr(OH)_3 + y(IO_3)^{-} + z(OH)^{-} \rightarrow a(CrO_4)^{2-} + b(I)^{-} + c(H_2O)$
The incorrect option about it is

In the reaction $SnCl_2(excess) + HgCl_2 \rightarrow A + SnCl_4$,'$A$' is

$A$ given amount of $Fe^{2+}$ is oxidized by $x \ mol$ of $MnO_{4}^{-}$ in acidic medium. The number of moles of $Cr_{2}O_{7}^{2-}$ required to oxidize the same amount of $Fe^{2+}$ in acidic medium is

Vedclass Test Series

Exam Paper Generator

Online Exam Module