Iron II Sulphate

Q.

Identify the gas evolved in the following reactions when:
Few crystals of $KN{O}_3$ are heated in a hard glass test tube.

Q. Potassium ferrocyanide is used for the detection of

1. $F{e}^{3+}$
2. $F{e}^{2+}$
3. $A{l}^{3+}$
4. $S{O}_4^{2-}$

Q. During the finishing of steel, sheets of rods of steel are treated with pickling baths of Sulphuric acid. This is performed to remove the impurities (oxide layer, scales, etc.) on the surface of the steel but this process also produces a by-product in large quantities. Which of the following could be that by-product?

1. Iron (II) Oxide
2. Iron (II) Chloride
3. Iron (II) Sulphate
4. Metallic Iron is precipitated

Q. Which of the following options is/are true when 4 moles of $FeS{O}_4$ is strongly heated?

1. 2 moles of $F{e}_2{O}_3$ are formed
2. 2 moles of $S{O}_2$ are formed
3. 2 moles of $S{O}_3$ are formed
4. 4 moles of $FeO$ are formed

Q. $GreenVitriol\underset{350{}^{o}C}{\overset{△}{\to }}P\left(Whitesolid\right)+7H_{2}O\left(g\right);P\underset{800{}^{o}C}{\overset{△}{\to }}Q\left(BrownSolid\right)+G_1\left(gas\right)+G_2\left(gas\right)$ Find the correct option(s)?

1. $P$ is Ferrous Sulphate
2. $Q$ is ferric oxide
3. $G_1$ and $G_2$ are acidic gases
4. Both $G_1$ and $G_2$ formed in equimolar