EASY
Earn 100

Why is brown ring formed in nitrate test?

Important Questions on Study of Compounds - Nitric Acid

EASY
Science>Chemistry>Study of Compounds - Nitric Acid>Properties of Nitric Acid

State one observation for the following:

Lead nitrate is heated strongly in a test tube.

MEDIUM
Science>Chemistry>Study of Compounds - Nitric Acid>Properties of Nitric Acid
Name the gas that is produced in the following case:
Action of cold and dilute nitric acid on copper.
EASY
Science>Chemistry>Study of Compounds - Nitric Acid>Properties of Nitric Acid

Complete the following equation:

Cu + dil. HNO3 →

HARD
Science>Chemistry>Study of Compounds - Nitric Acid>Properties of Nitric Acid

State one relevant observation for the following reactions:

  • Action of concentrated nitric acid on copper.
MEDIUM
Science>Chemistry>Study of Compounds - Nitric Acid>Properties of Nitric Acid

Which statement is not true with respect to nitrate ion test?

HARD
Science>Chemistry>Study of Compounds - Nitric Acid>Properties of Nitric Acid
An inorganic Compound 'X' on treatment with concentrated H2SO4 produces brown fumes and gives dark brown ring with FeSO4 in presence of concentrated H2SO4. Also Compound 'X' gives precipitate 'Y', when its solution in dilute HCl is treated with H2S gas. The precipitate 'Y' on treatment with concentrated HNO3 followed by excess of NH4OH further gives deep blue coloured solution, Compound 'X' is:
EASY
Science>Chemistry>Study of Compounds - Nitric Acid>Properties of Nitric Acid
In brown ring test for nitrate ions, brown ring is formed having composition 
EASY
Science>Chemistry>Study of Compounds - Nitric Acid>Properties of Nitric Acid
Brown ring test is to detect the presence of
MEDIUM
Science>Chemistry>Study of Compounds - Nitric Acid>Properties of Nitric Acid
The brown ring test is used for the detection of
EASY
Science>Chemistry>Study of Compounds - Nitric Acid>Properties of Nitric Acid
Nitrate is confirmed by ring test. The brown colour of the ring is due to the formation of
HARD
Science>Chemistry>Study of Compounds - Nitric Acid>Properties of Nitric Acid
[Fe(H2O)5NO]2+ is a complex formed during the brown ring test for NO3- ion. In this complex-
MEDIUM
Science>Chemistry>Study of Compounds - Nitric Acid>Properties of Nitric Acid
The brown ring formed on the junction is due to the formation of
EASY
Science>Chemistry>Study of Compounds - Nitric Acid>Properties of Nitric Acid
Which of the following combines with Fe (II) ions in aqueous solution to form a brown complex?
MEDIUM
Science>Chemistry>Study of Compounds - Nitric Acid>Properties of Nitric Acid
A brown ring is formed in the ring test for NO3- ion. It is due to the formation of:
EASY
Science>Chemistry>Study of Compounds - Nitric Acid>Properties of Nitric Acid
An organic liquid which bursts into flames on addition of concentrated nitric acid is _____. (petrol/ kerosene/ turpentine oil)
HARD
Science>Chemistry>Study of Compounds - Nitric Acid>Properties of Nitric Acid
The oxidation number of Fe in brown ring [Fe(H2O)5NO]2+ is
MEDIUM
Science>Chemistry>Study of Compounds - Nitric Acid>Properties of Nitric Acid
A nitrate which leaves a black residue on heating is _____.
(Write the chemical name of the nitrate.)
MEDIUM
Science>Chemistry>Study of Compounds - Nitric Acid>Properties of Nitric Acid
Cold dilute nitric acid reacts with copper to form _____.
(hydrogen, nitrogen dioxide, nitric oxide).
MEDIUM
Science>Chemistry>Study of Compounds - Nitric Acid>Properties of Nitric Acid
The complex [Fe(H2O)5NO]2+ is formed in the brown ring test for nitrates when freshly prepared FeSO4 solution is added to aqueous solution of NO 3 - followed by addition of conc. H2SO4. Select correct statement about this complex.
HARD
Science>Chemistry>Study of Compounds - Nitric Acid>Properties of Nitric Acid
What is the magnetic moment of coordination compound formed during brown ring test?