NEET Chemistry Chapter Wise Mock Test – Redox Reactions

NEET Chemistry Chapter Wise Mock Test – Redox Reactions

Question 1:

Question 2:
Which of the following halogen acid is better reducing agent?
(a)HCI
(b)HBr
(c)HI
(d) HF

Question 3:

Question 4:

Question 5:

Question 6:

Question 7:

Question 8:

Question 9:
Which of the following substances acts as ah oxidising as well as reducing agent?
(a) Na₂0
(b) SnCI₂
(c) Na₂0₂
(d) NaN0₂

Question 10:
The number of moles of KMn04 reduced by one mole of KI in alkaline medium is
(a) one fifth
(b) five
(c) one
(d) two

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.
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

Question 11:

Question 12:
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)

Question 13:

Question 14:
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

Question 15:

Question 16:
In ferrous ammonium sulphate, oxidation number of Fe is
(a)+3
(b) + 2
(o) -2
(d)0

Question 17:
In which of the following compounds, an element exhibits two different oxidation states
(a) NH₂OH
(b) NH₄N0₃
(c) N₂H₄
(d) N₃H

Question 18:
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?
(a) -1
(b) – 2
(c) + 3
(d) + 4

Question 19:

Question 20:
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

Question 21:
Oxidation number of S in Na₂S₂0₃ is
(a) +2
(b) – 2
(c)+6
(d) Both (b) and (c)

Question 22:
The oxidation number of C in CH₂0 is
(a) 0
(b) + 2
(c) – 2
(d) + 4

Question 23:

Question 24:
Oxidation number of C in CH₂CI₂ is
(a) 0
(b) 2
(c) 3
(d) 5

Question 25:
The oxidation state of S in H₂S₂O₈ is
(a) + 2
(b) + 4
(c) + 6
(d) + 7

Question 26:

Question 27:

Question 28:

Question 29:
Which of the following elements does not show disproportionation tendency?
(a) Cl
(b) Br
(c) F
(d) I

Question 30:
The chemical that undergoes self oxidation and self reduction in the same reaction is
(a) benzyl alcohol
(b) acetone
(c) formaldehyde
(d) acetic acid

Question 31:

Question 32:

Question 33:

Question 34:

Question 35:

Question 36:

Question 37:

Question 38:

Question 39:
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

Question 40:

Question 41:
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Question 42:

Question 43:

Question 44:
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) S0₂
(b)C0₂
(c) S0₃
(d) H₂S

Question 45:

Question 46:
A mixture of potassium chlorate, oxalic’ acid and sulphuric acid is heated. During the reaction which element undergoes maximum change in the oxidation number?
(a) S
(b) H
(c) Cl
(d) C

Question 47:
In which of the following compounds, nitrogen exhibits highest oxidation state?
(a) N₂H₄
(b)NH₃
(C)N₃H
(d)NH₂OH

Question 48:
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

Question 49:

Question 50:

Question 51:
The oxidation state of chromium in the final product formed by the reaction between KI and acidified potassium dichromate solution is
(a) +3
(b) +2
(c) +6
(d) +4

Question 52:
Which one of the following compounds is a peroxide?
(a) K0₂
(b) Ba0₂
(c)Mn0₂
(d) N0₂

Question 53:
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

Question 54:
Highest oxidation state of Mn is present in
(a) KMn0₄
(b) K₂Mn0₄
(c) Mn₂0₃
(d) Mn0₂

Answers:

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