NEET Oxidizing & Reducing Agents Practice Questions With Solutions

NEET Chemistry Oxidizing & Reducing Agents Practice Questions

Biology Physics

Question 1.

The incorrect oxidation number of the underlined atom in the following species is:

ACu₂O is -1

BCl$O_{3}^{-}$ is +5

CK₂Cr₂O₇ is +6

DHAuCl₄ is +3

Question 2.

The oxidation state of Cr in

{CrO}_{6}

is -

A-6

B+12

C+6

D+4

Question 3.

The correct order of N-compounds in its decreasing order of oxidation states is :

A

{HNO}_{3},

NO,

N_{2},

{NH}_{4} Cl

B

{HNO}_{3}, NO, {NH}_{4} Cl, N_{2}

C

{HNO}_{3}, {NH}_{4} Cl, NO, N_{2}

D

{NH}_{4} Cl, N_{2}, NO, {HNO}_{3}

Question 4.

(a) H₂O₂ + O₃ → H₂O + 2O₂ (b) H₂O₂ + Ag₂O → 2Ag + H₂O + O₂

The role of hydrogen peroxide in the above reactions is respectively:

AOxidizing in (a) and reducing in (b)

BReducing in (a) and oxidizing in (b)

CReducing in (a) and (b)

DOxidizing in (a) and (b)

Question 5.

The change in oxidation number of chlorine when Cl₂ gas reacts with hot and concentrated sodium hydroxide solution is:

AZero to +1 and Zero to –5

BZero to –1 and Zero to +5

CZero to –1 and Zero to +3

DZero to +1 and Zero to –3

Question 6.

The highest oxidation number of nitrogen among the following compounds is:

A

N_{2} H_{4}

B

{NH}_{3}

C

N_{3} H

D

{NH}_{2} OH

Question 7.

Oxidation numbers of P in ${PO}_{4}^{3 -}$ , of S in ${SO}_{4}^{2 -}$ and that of Cr in ${Cr}_{2} O_{7}^{2 -}$ are respectively:

A+5, +6 and +6

B+3, +6 and +5

C+5, +3 and +6

D-3, +6 and +6

Question 8.

The oxidation states(O.S.) of sulphur in the anions

{SO}_{3}^{2 -},

S_{2} {O_{4}}^{2 -}

and

S_{2} {O_{6}}^{2 -}

follow the order:

A

S_{2} {O_{4}}^{2 -} < {SO}_{3}^{2 -} < S_{2} {O_{6}}^{2 -}

B

{SO}_{3}^{2 -} < S_{2} {O_{4}}^{2 -} < S_{2} {O_{6}}^{2 -}

C

S_{2} {O_{4}}^{2 -} < S_{2} {O_{6}}^{2 -} < {SO}_{3}^{2 -}

D

S_{2} {O_{6}}^{2 -} < S_{2} {O_{4}}^{2 -} < {SO}_{3}^{2 -}

Question 9.

If the oxidation numbers of A, B, and C are + 2, +5, and –2 respectively, then the possible formula of the compound is:

AA₂(BC₂)₂

BA₃(BC₄)₂

CA₂(BC₃)₂

DA₃(B₂C)₂

Question 10.

The compound that contains zero oxidation state of Fe is:

A[Fe(CN)₆]^-4

B[Fe(CN)₆]^-3

CFe(CO)₅

DAll of the above.

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