NEET-XII-Chemistry
exam-2 year:2016
- #136Hot concentrated sulphuric acid is a moderately
strong oxidizing agent. Which of the following
reactions does not show oxidizing behaviour ?
(1) ``\ce {C + 2H2SO4 \rightarrow CO2 + 2SO2 + 2H2O}``
(2)``\ce { CaF2 + H2SO4 \rightarrow CaSO4 + 2HF}``
(3) ``\ce {Cu + 2H2SO4 \rightarrow CuSO4 + SO2 + 2H2O}``
(4) ``\ce {3S + 2H2SO4 \rightarrow 3SO2 + 2H2O}``digAnsr: 2Ans : (2)
Sol. CaF2 + H2SO4 ï‚®CaSO4 + 2HF
In this reaction, oxidation number of none of the
atom is not changed. Hence H2SO4 is not acting as
oxidising agent.