Advertisements
Advertisements
प्रश्न
On addition to conc. \[\ce{H2SO4}\] to a chloride salt, colourless fumes are evolved but in the case of an iodide salt, violet flames come out. This is because ______.
विकल्प
\[\ce{H2SO4}\] reduces \[\ce{HI}\] to \[\ce{I2}\]
\[\ce{HI}\] is of violet colour
\[\ce{HI}\] gets oxidised to \[\ce{I2}\]
\[\ce{HI}\] changes to \[\ce{HIO3}\]
उत्तर
On addition to conc. \[\ce{H2SO4}\] to a chloride salt, colourless fumes are evolved but in the case of an iodide salt, violet flames come out. This is because \[\ce{HI}\] gets oxidised to I2.
Explanation:
\[\ce{HI}\] formed during reaction is oxidized to \[\ce{I2}\] which is violet in colour.
\[\ce{2NaCl + H2SO4 -> Na2SO4 + 2HCl}\]
In case of iodine, the halogen acid obtained \[\ce{(HI)}\] is oxidized to free iodine.
\[\ce{2NaI + H2SO4 -> Na2SO4 + 2HI ->[H2SO4] 2H2O + SO2 + I2}\]
APPEARS IN
संबंधित प्रश्न
The mixture of concentrated HCl and HNO3 made in 3 : 1 ratio contains:
The correct order of acid strength of oxyacids is:
The correct order of acid strength is:
Affinity for hydrogen decreases in the group from fluorine to iodine. Which of the halogen acids should have the highest bond dissociation enthalpy?
On heating compound (A) gives a gas (B) which is a constituent of air. This gas when treated with 3 mol of hydrogen (H2) in the presence of a catalyst gives another gas (C) which is basic in nature. Gas C on further oxidation in moist condition gives a compound (D) which is a part of acid rain. Identify compounds (A) to (D) and also give necessary equations of all the steps involved.
The pOH of a 0.0235 M hydrochloric acid will be
What is the conjugate acid of \[\ce{H2SO^{-}4}\]?
Which one of the following is the correct statement?
Least volatile hydrogen halide is
The IUPAC name of the complex ion formed when gold dissolves in aqua regia are ______
