Oxides and Oxoanions

Q.

What is the colour of Ferric oxide?

Q. A non metal A which is the largest constituent of air , when heated with H2 in 1:3 ratio in the pesence of a catalyst (Fe)gives a gas B .on heating with O2, ot gives an oxide C.if this oxide is passed into water in the presence of air, it gives an acid D which acts as a strong oxidising agent .identify A, B, C, D.

Q. When ferric oxide reacts with NaOH, the product formed is

1. NaF
2. $FeC{l}_3$
3. $Fe(OH{)}_3$
4. $NaFe{O}_2$

Q. $TiC{l}_4$ fumes strongly in moist air and is hydrolyzed by water to give

1. $Ti$
2. $Ti{O}_2$
3. $Ti{O}_3^{2-}$
4. $TiOC{l}_2$

Q. Choose correct order of oxidizing power:-

1. VO₂⁺ < Cr₂O₇^2- < MnO4^-
2. Cr₂O₇^2-2⁺ < MnO₄^-
3. MnO₄^- < Cr₂O₇^2-+
4. VO₂⁺ < MnO₄^- < Cr₂O₇^2-