NEET Chemistry Chapter Wise Mock Test – Redox Reactions
Which of the following halogen acid is better reducing agent?
Which of the following substances acts as ah oxidising as well as reducing agent?
The number of moles of KMn04 reduced by one mole of KI in alkaline medium is
(a) one fifth
Direction In the following question more than one of the answers given may be correct. Select the correct answers and mark it according to the codes.
(a) 1, 2 and 3 are correct
(b) 1 and 2 are correct
(c) 2 and 4 are correct
(d) 1 and 3 are correct
While sulphur dioxide and hydrogen peroxide can act as oxidising as well as reducing agents in their reactions, ozone and nitric acid act only as oxidants. This is because
(a) in S02and H202, S and O are in their lowest oxidation state
(b) in 03 and HN03, N and 0 are in their highest oxidation state
(c) in 03 and HN03, N and O are in their lowest oxidation state
(d) Both (a) and (b)
Whenever a reaction between an oxidising agent and a reducing agent is carried out
(a) a compound of lower oxidation state is formed if the reducing agent is in excess
(b) a compound of higher oxidation state is formed if the oxidising agent is in excess
(c) Both (a) and (b)
(d) None of the above
In ferrous ammonium sulphate, oxidation number of Fe is
(b) + 2
In which of the following compounds, an element exhibits two different oxidation states
A 2.5 moles of hydrazine NgH,, loses 25 moles of electrons is being converted to a new compound X. Assuming that all of the nitrogen appears in the new compound, what is the oxidation state of nitrogen in compound X?
(b) – 2
(c) + 3
(d) + 4
In which of the following, the oxidation number of oxygen has been arranged in the increasing order?
(a) OF2 < K02 < Ba02 <03
(b) Ba02 < K02< 03 < OF2
(c) Ba02 < 03 < OF2< K02
(d) K02 < OF2 < 02 < Ba02
Oxidation number of S in Na2S203 is
(b) – 2
(d) Both (b) and (c)
The oxidation number of C in CH20 is
(b) + 2
(c) – 2
(d) + 4
Oxidation number of C in CH2CI2 is
The oxidation state of S in H2S2O8 is
(a) + 2
(b) + 4
(c) + 6
(d) + 7
Which of the following elements does not show disproportionation tendency?
The chemical that undergoes self oxidation and self reduction in the same reaction is
(a) benzyl alcohol
(d) acetic acid
Which of the following processes does not involve oxidation of iron?
(a) Rusting of iron sheets
(b) Decolourisation of blue CuS04 solution by iron
(c) Formation of Fe(CO)5 from Fe
(d) Liberation of H2 from steam by iron at high temperature
Roasting of sulphides gives the gas Xas a by product. This is a colourless gas with choking smell of burnt sulphur and caused great damage to respiratory organs as a result of acid rain. Its aqueous solution is acidic, acts as a reducing agent and its acid has never been isolated. The gas X is [NEET 2013]
A mixture of potassium chlorate, oxalic’ acid and sulphuric acid is heated. During the reaction which element undergoes maximum change in the oxidation number?
In which of the following compounds, nitrogen exhibits highest oxidation state?
When C12 gas reacts with hot and concentrated sodium hydroxide solution, the oxidation number of chlorine changes from
(a) zero to +1 and zero to -5
(b) zero to -1 and zero to +5
(c) zero to -1 and zero to +3
(d) zero to +1 and zero to -3
The oxidation state of chromium in the final product formed by the reaction between KI and acidified potassium dichromate solution is
Which one of the following compounds is a peroxide?
Oxidation states of P in H4P205, H4P206, H4P207, are respectively
(a)+3, + 5, + 4
(b)+5, + 3, + 4
(c)+5, + 4, + 3
(d)+3, + 4, + 5
Highest oxidation state of Mn is present in
Hints and SOlutions