Every question from past board papers on General trends, Group 15 and 16, newest paper first. Open any question for its full worked answer.
Given below are two statements :
Statement I : Like nitrogen that can form ammonia, arsenic can form arsine.
Statement II : Antimony cannot form antimony pentoxide.
In the light of the above statements, choose the most appropriate answer from the options given below :
Among Group 16 elements, which one does NOT show \(-2\) oxidation state?
Given below are two statements:
Statement I : The boiling point of hydrides of Group 16 elements follow the order
\(H_2O > H_2Te > H_2Se > H_2S\).
Statement II : On the basis of molecular mass, \(H_2O\) is expected to have lower boiling point than the other members of the group but due to the presence of extensive H-bonding in \(H_2O\), it has higher boiling point.
In the light of the above statements, choose the correct answer from the options given below:
The products A and B obtained in the following reactions, respectively, are
\(3ROH + PCl_3 \rightarrow 3RCl + A\)
\(ROH + PCl_5 \rightarrow RCl + HCl + B\)
Match List - I with List - II :
List - I (Oxoacids of Sulphur): A. Peroxodisulphuric acid B. Sulphuric acid C. Pyrosulphuric acid D. Sulphurous acid
List - II (Bonds): I. Two S-OH, Four S=O, One S-O-S II. Two S-OH, One S=O III. Two S-OH, Four S=O, One S-O-O-S IV. Two S-OH, Two S=O
Choose the correct answer from the options given below :
Given below are two statements :
Statement I :
The boiling points of the following hydrides of group 16 elements increases in the order -
\(H_2O < H_2S < H_2Se < H_2Te\).
Statement II :
The boiling points of these hydrides increase with increase in molar mass.
In the light of the above statements, choose the most appropriate answer from the options given below :
The pollution due to oxides of sulphur gets enhanced due to the presence of :
(a) particulate matter
(b) ozone
(c) hydrocarbons
(d) hydrogen peroxide
Choose the most appropriate answer from the options given below :
Which of the following oxoacid of sulphur has \(-\)O\(-\)O\(-\) linkage ?
Which is the correct thermal stability order for H\(_2\)E (E = O, S, Se, Te and Po) ?
Identify the incorrect statement related to PCl\(_5\) from the following :
Which oxide of nitrogen is not a common pollutant introduced into the atmosphere both due to natural and human activity ?
Name the gas that can readily decolourise acidified \(KMnO_4\) solution :
In which pair of ions both the species contain S-S bond ?
When copper is heated with conc. \(HNO_3\) it produces :
The product obtained as a result of a reaction of nitrogen with \(CaC_2\) is :
Which is the correct statement for the given acids ?
Which of the following fluoro-compounds is most likely to behave as a Lewis base?
Hot concentrated sulphuric acid is a moderately strong oxidizing agent. Which of the following reactions does not show oxidizing behaviour?
