Acidified is decolourised by:
(1) oxygen
(2) hydrogen
(3) nitric oxide
(4) nascent hydrogen
The role of when added to a solution containing is of-
1. An oxidizing agent
2. A reducing agent
3. Both as an oxidizing as well as a reducing agent
4. None of the above
The correct statement among the following regarding reaction of with potassium ferrocyanide to ferricyanide is -
(1)
(2)
(3)
(4)
act as a reducing agent in :
1. Reaction with a ferrous salt.
2. Reaction with iodides.
3. Reaction with lead sulphide.
4. Reaction with in an acid medium.
turns an acidified solution of ........... to orange-red.
(1)
(2)
(3)
(4)
cannot be formed by which of the following reaction?
(1) Electrolysis of 50%
(2) Hydrolysis of
(3) Action of
(4) Action of
The correct statement among the following regarding H2O2 is-
1. Two hydrogen atoms are connected to one oxygen atom.
2. All the four atoms are in the same plane.
3. The four atoms are arranged in a non-linear and non-planar manner.
4. O-H bonds are polar but the molecule is non-polar.
The oxidising nature of is shown in the reaction-
1.
2.
3.
4.
on treatment with chlorine gives:
(1)
(2) oxygen
(3) HOCl
(4)
For the bleaching of hair, the substance used is:
1.
2. Bleaching powder
3.
4.