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. |
The number of moles of NO produced by the oxidation of two moles of NH3 will be -
1. 2
2. 3
3. 4
4. 6
The oxidation state of the central atom in the anion of compound \(\mathrm{NaH}_2 \mathrm{PO}_2\) will be:
1. | +3 | 2. | +5 |
3. | +1 | 4. | -3 |
A compound that does not have a tetrahedral shape is:
1. \(\mathrm{NH}_{4}^{+}\)
2. \(\mathrm{SiCl}_{4}\)
3. \(\mathrm{SF}_{4}\)
4. \(\mathrm{SO}_{4}^{2-}\)
Which of the following are peroxoacids of sulphur?
1. \(\mathrm{H}_{2} \mathrm{SO}_{5} \text { and } \mathrm{H}_{2} \mathrm{~S}_{2} \mathrm{O}_{8}\)
2. \(\mathrm{H}_{2} \mathrm{SO}_{5} \text { and } \mathrm{H}_{2} \mathrm{~S}_{2} \mathrm{O}_{7}\)
3. \(\mathrm{H}_{2} \mathrm{~S}_{2} \mathrm{O}_{7} \text { and } \mathrm{H}_{2} \mathrm{~S}_{2} \mathrm{O}_{8}\)
4. \(\mathrm{H}_{2} \mathrm{~S}_{2} \mathrm{O}_{6} \text { and } \mathrm{H}_{2} \mathrm{~S}_{2} \mathrm{O}_{7}\)
In the preparation of compounds of Xe, Bartlett had taken \(O_{2}^{+}PtF_{6}^{-}\) as a base compound. This is because:
1. Both and Xe have same size.
2. Both and Xe have same electron gain enthalpy.
3. Both and Xe have almost same ionisation enthalpy.
4. Both Xe and are gases.
Which of the following is true regarding the P4 molecule of white phosphorus?
1. It has 6 lone pairs of electrons.
2. It has four P — P single bonds.
3. It has three P — P single bonds.
4. It has four lone pairs of electrons.
The correct statement among the following about SO2 gas is:
1. | It acts as bleaching agent in moist conditions. |
2. | It's molecule has linear geometry. |
3. | It's concentrated solution is used as a disinfectant. |
4. | It can be prepared by the reaction of dilute H2SO4 with metal sulphide. |