The catalyst that is used in the contact process is:
1. | Fe2O3 | 2. | Al2O3 |
3. | V2O5 | 4. | SO3 |
The chemical formula of oleum is -
1. | H2S2O8 | 2. | H2S2O7 |
3. | H3S2O6 | 4. | H2SO5 |
The correct increasing order of basic strength of hydrides:
1. BiH3 \(\simeq \) SbH3 < AsH3 < PH3 < NH3
2. BiH3 > NH3 > PH3 > SbH3 > AsH3
3. SbH3 < AsH3 < PH3 < NH3 < BiH3
4. AsH3 > NH3 > PH3 > SbH3 > BiH3
Lead nitrate upon heating gives:
An element that does not show allotropy is:
1. Nitrogen
2. Phosphorus
3. Antimony
4. Arsenic
The maximum covalency of nitrogen is:
1. 3
2. 5
3. 4
4. 6
Which of the following statements is false?
1. | Single N—N bond is stronger than the single P—P bond. |
2. | PH3 can act as a ligand in the formation of coordination compound with transition elements. |
3. | NO2 is paramagnetic in nature. |
4. | Covalency of nitrogen in N2O5 is four. |
A brown ring formed in the ring test for ion is due to the formation of:
1. [Fe(H2O)5(NO)]2+
2. FeSO4.NO2
3. [Fe(H2O)4(NO)2]2+
4. FeSO4.HNO3
Bismuth is present in a +5 oxidation state in:
1. \(\mathrm{Bi}_{2} \mathrm{O}_{5}\)
2. \(\mathrm{BiF}_{5}\)
3. \(\mathrm{BiCl}_{5}\)
4. \(\mathrm{Bi}_{2} \mathrm{~S}_{5}\)
Ammonium dichromate and barium azide on heating gives:
1. | N2 in both cases. |
2. | N2 with ammonium dichromate and NO with barium azide. |
3. | N2O with ammonium dichromate and N2 with barium azide. |
4. | N2O with ammonium dichromate and NO2 with barium azide. |