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Which of the following statements regarding sulphur is incorrect?

The oxidation state of sulphur is never less than +4 in its compounds
S2 molecule is paramagnetic
The vapour at 200°C consists mostly of S8 rings
At 600°C the gas mainly consists of S2 molecules
Additional Questions

Of the following compounds the most acidic is

Answer

The brown ring test for nitrates depends on

Answer

Which of the following is used to prepare Cl2 gas at room temperature from concentrated HCl?

Answer

Which one of the following is not true at room temperature andpressure

Answer

The tendency of BF3, BCl3 and BBr3 to behave as Lewis acid decreases in the sequence:

Answer

Which statement is NOT correct about fullerene C60?

Answer

Which one of the following arrangements represents the correct order of least negative to most negative electron gain enthalpy for C, Ca, Al, F and O?

Answer

In which of the following compounds, nitrogen exhibits highest oxidation state?

Answer

Three reactions involving H2PO
4
are given below

(i) H3PO4 + H2O → H3O+ + H2PO
4

(ii) H2PO
4
+ H2O → HPO2–
4
+ H3O+

(iii) H2PO
4
+ OH → H3PO4 + O2–

In which of the above does H2PO
4
act as an acid?

Answer

Which noble gas is most abundant in atmosphere?

Answer
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