Q. No.\(\begin{aligned} &\mathrm{PCl}_{5}+\mathrm{H}_{2} \mathrm{O} \longrightarrow \mathrm{A}+\mathrm{HCl} \\ &\mathrm{A}+\mathrm{H}_{2} \mathrm{O} \longrightarrow \mathrm{B}+\mathrm{HCl} \end{aligned}\)
then the maximum numbers of ionizable hydrogen in B are:
1. 2
2. 0
3. 3
4. 1
Given below are two statements :
| Statement I: | α and β forms of sulphur can change reversibly between themselves with slow heating or slow cooling. |
| Statement II: | At room temperature, the stable crystalline form of sulphur is monoclinic sulphur. |
| 1. | Statement I is false but Statement II is true. |
| 2. | Both Statement I and Statement II are true. |
| 3. | Statement I is true but Statement II is false. |
| 4. | Both Statement I and Statement II are false. |
If the boiling point of H2O is 373 K, the boiling point of H2S will be:
1. Greater than 300 K but less than 373 K
2. Less than 300 K
3. More than 373 K
4. Equal to 373 K
The oxoacid of sulphur that does not contain a bond between sulphur atoms is:
1. H2S2O7
2. H2S2O3
3. H2S4O6
4. H2S2O4
Which of the following is the wrong statement?
1. Ozone is violet-black in solid-state
2. Ozone is paramagnetic gas
3. ONCl and ONO–are not isoelectronic
4. O3 molecule is bent
Choose the incorrect statement among the following statements regarding the sulphur.
| 1. | S2 molecule is paramagnetic. |
| 2. | The vapour sulphur partly exists as S2 molecule. |
| 3. | In cyclo-S6 , the ring adopts the chair form. |
| 4. | The oxidation state of sulphur is never less than +4 in its compounds. |
In which of the following arrangements, the sequence is not strictly according to the property written against it?
| 1. | CO2 < SiO2 < SnO2 < PbO2: increasing oxidising power |
| 2. | HF < HCl < HBr < HI : increasing acid strength |
| 3. | NH3 < PH3 < AsH3 < SbH3 : increasing basic strength |
| 4. | B < C < O < N : increasing first ionization enthalpy |
Among the following allotropic forms of sulphur, the allotropic form paramagnetic in nature is:
| 1. | -sulphur | 2. | -sulphur |
| 3. | S2-form | 4. | None of the above |
1. \(H_2S<H_2Se<H_2Te<H_2O\)
2. \(H_2O<H_2S<H_2Se<H_2Te\)
3. \(H_2S<H_2Te<H_2Se<H_2O\)
4. \(H_2Se<H_2S<H_2Te<H_2O\)
1. \(O,~Ti\) and \(Po\)
2. \(Se, ~Te\) and \(Po\)
3. \(Se,~ Tb\) and \(Pu\)
4. \(S, ~Te\) and \(Pm\)
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