Chemistry Chapter 9 Mock Test

Maximum no. of moles of electrons taken up by one mole of \(NO_{3}^{-}\), when it is reduced to

\(NO_{2}\)
NO
\(NH_{2}OH\)
\(NH_{3}\)

The nitrate that will leave behind a metal on strong heating is

Silver nitrate
Manganese nitrate
Copper nitrate
Ferric nitrate

In the given reaction \(H_{2}S+NO_{2} \rightarrow H_{2}O+NO+S, H_{2}S\) is

precipitated
oxidized
reduced
none of these

The oxidation number of Mn changes from _____ when KMnO₄ is reduced with oxalic acid in acidic solution

4 to 2
6 to 4
7 to 2
7 to 4

In which of the following acid, phosphorus has the oxidation state of +3?

Pyrophosphoric acid
Metaphosphoric acid
Phosphorus acid
Orthophosphoric acid

What is the oxidation number of sulphur in \(H_{2}S_{2}O_{7}\) and iron in \(K_{4}Fe(CN)_{6}\) respectively?

+ 6 and + 4
+ 8 and + 2
+ 2 and + 2
+ 6 and + 2

The equivalent mass of \(IO_{4}^{-}\), when it is converted into \(I_{2}\) in acid medium is:

M/7
M/6
M/5
M/4

Find the oxidation number of iron in the compound K₄[Fe(CN)₆].

+2
+3
+4
+6

Find the oxidation no. of Fe in K₃[Fe(CN)₆],

+4
+3
+2
+1

Identify ‘A’ in the following reaction

\(2Fe^{3+}_{(aq)}+Sn^{2+}_{(aq)}\rightarrow 2Fe^{2+}_{(aq)}+A\)

Sn
\(Sn^{2+}_{(aq)}\)
\(Sn^{3+}_{(aq)}\)
\(Sn^{4+}_{(aq)}\)

Statement 1: Emf and potential difference are same for the cell.

Statement 2: Both Emf and potential difference gives the difference in electrode potential under any condition.

Both Statement 1 and Statement 2 are true but Statement 2 is not the correct explanation of Statement 1
Both Statement 1 and Statement 2 are true and the Statement 2 is correct explanation of the Statement 1
Both Statement 1 and Statement 2 are false
This Statement 1 is false but the Statement 2 is true

Statement 1: Oxidation state of N in N₃H is +3.

Statement 2: Nitrogen is more electronegative than that of hydrogen.

Both Statement 1 and Statement 2 are true but Statement 2 is not the correct explanation of Statement 1
Both Statement 1 and Statement 2 are true and the Statement 2 is correct explanation of the Statement 1
This Statement 1 is true, but the Statement 2 is false
This Statement 1 is false but the Statement 2 is true

The compound in which chlorine is assigned the oxidation number + 5 is

HCI
\(HClO_{2}\)
\(HClO_{3}\)
\(HClO_{4}\)

Compound in which the transition metal possess zero oxidation state is

\(NOClO_{4}\)
\([Fe(CO)_{5}]\)
\(NH_{2}.NH_{2}\)
\(CrO_{5}\)

Oxidation number of Co in \([CO(NH_{3})_{4}ClNO_{2}]\) is:

+5
+4
+3
+2

What is the oxidation number of C in co₂?

+4
-4
+2
-2

Find the change in the oxidation state of chromium when K₂Cr₂O₇ is converted to K₂CrO₄

3
4
6
0

What is the oxidation state of I in \(IPO_{4}\)?

+7
+5
+3
+1

Statement 1: Half-cell reaction is the one which goes half way to the completion.

Statement 2: Half cell reaction occurs at one electrode.

Both Statement 1 and Statement 2 are true but Statement 2 is not the correct explanation of Statement 1
Both Statement 1 and Statement 2 are true and the Statement 2 is correct explanation of the Statement 1
This Statement 1 is true, but the Statement 2 is false
This Statement 1 is false but the Statement 2 is true

Find the oxidation no. of S in H₂S₂O₈.

+7
+6
+4
+2

_______ is not a reducing agent.

\(SnCl_{2}\)
HI
\(NaNO_{3}\)
\(NaNO_{2}\)

Find the oxidation number of N in \(NH_{4}Cl\)

-3
+3
+5
-5

Which of the following halide is not oxidized by MnO₂?

I
Br
Cl
F

When a piece of wire of copper (Cu) is dipped in \(AgNO_{3}\) solution, the colour of the solution turns blue because of

reduction of copper
oxidation of silver
oxidation of copper
formation of soluble complex

Find the oxidation state shown by silicon, when it combines with strongly electropositive metals.

-4
+4
-2
+2

What is the product of oxidation of \(I^{-}\) with MnO₄ in alkaline medium?

\(IO_{4}^{-}\)
\(IO^{-}\)
\(I_{2}\)
\(IO_{3}^{-}\)

What does the equation \(H_{2}S+H_{2}O_{2} \rightarrow S+2H_{2}O\) represent?

Reducing nature of \(H_{2}O_{2}\)
Oxidizing nature of \(H_{2}O_{2}\)
Basic nature of \(H_{2}O_{2}\)
Acidic nature of \(H_{2}O_{2}\)

The process of conversion of sugar \(C_{12}H_{22}O_{11} \rightarrow CO_{2}\) is

reduction
oxidation
neither oxidation nor reduction
both oxidation and reduction

Statement 1 : In CH₂O, oxidation no. of carbon is zero.

Statement 2 : CH₂O formaldehyde, is a covalent compound.

Both statement 1 and statement 2 are true and the statement 2 is the correct explanation of the statement 1
Both statement 1 and statement 2 are true but statement 2 is not the correct explanation of the statement 1
Statement 1 is true but statement 2 is false
The statement 1 and statement 2 both are false

Reaction \(H_{2}S+H_{2}O_{2} \rightarrow 2H_{2}O+S\) represents

acidic nature of \(H_{2}O_{2}\)
alkaline nature of \(H_{2}O_{2}\)
reducing action of \(H_{2}O_{2}\)
oxidizing action of \(H_{2}O_{2}\)

The compound in which transition metal is in oxidation state zero is:

\([Fe(H_{2}O)_{3}](OH)_{2}\)
\([Ni(CO)_{4}]\)
\([Fe(H_{2}O)_{6}SO_{4}]\)
\([Co(NH_{3})_{6}]Cl_{2}\)

Which of the following compound could not act both as oxidizing as well as reducing agent?

CrO
\(Al_{2}O_{3}\)
\(MnO_{2}\)
\(SO_{2}\)

Statement 1 : Oxidation numbers are artificial which are useful as a ‘book-keeping’ device of electrons in reactions.

Statement 2 : Oxidation numbers do not usually signify real charges on atoms, they are simply- conventions which indicate what the maximum charge could possibly be on an atom in the molecule.

Both statement 1 and statement 2 are true and the statement 2 is the correct explanation of the statement 1
Both statement 1 and statement 2 are true but statement 2 is not the correct explanation of the statement 1
Statement 1 is true but statement 2 is false
The statement 1 and statement 2 both are false

In which of the following, chlorine is in +1 oxidation state?

\(Cl_{2}O\)
ICI
\(HClO_{4}\)
HCI

Compound is in its low oxidation state. Then it is

highly acidic
half acidic, half basic
highly basic
highest oxidising property

A metal ion M³⁺ after loss of 3 electrons in a reaction will have an oxidation no. equivalent to

+6
+3
+2
0

What is the oxidation state of I in \(H_{4}IO_{6}^{-}\) ?

-1
+1
+5
+7

Which of the following can act as an acid as well as a base?

\(HS^{-}\)
\(HClO_{3}^{-}\)
\(H_{2}PO_{4}^{-}\)
All of these

Nitrogen shows different oxidation states in which of the following range?

-3 to+ 5
0 to +5
-3 to+ 3
-5 to+ 3

SnCl₂ gives a precipitate with a solution of HgCl₂. HgCl₂ is in this process.

oxidized
reduced
converted into a complex compound containing both Sn and Hg
converted into a chloro complex of Hg

In the given reaction, \(4P + 3KOH + 3H_{2}O \rightarrow 3KH_{2}PO_{2}+PH_{3}\)

P is oxidised only
P is oxidized as well as reduced
P is reduced only
None of these

Find the oxidation state of ‘S’ in \(H_{2}SO_{3}\).

+2
+3
+4
+6

The oxidation states of sulphur in the anions \(SO_{3}^{2-}, S_{2}O_{4}^{2-} and S_{2}O_{6}^{2-}\) follow which of the following order?

\(S_{2}O_{4}^{2-} \textless SO_{3}^{2-} \textless S_{2}O_{6}^{2-}\)
\(S_{2}O_{6}^{2-} \textless S_{2}O_{4}^{2} \textless SO_{3}^{2-}\)
\(S_{2}O_{4}^{2} \textless S_{2}O_{6}^{2-} \textless SO_{3}^{2-}\)
\(SO_{3}^{2-} \textless S_{2}O_{4}^{2-} \textless S_{2}O_{6}^{2-}\)

Statement 1: Bromide ion is serving as a reducing agent in the given reaction.

\(2MnO_{4}^{-}(aq)+Br^{-}(aq)+H_{2}O(l) \rightarrow 2MnO_{2}(aq)+BrO_{3}^{-}(aq)+2OH^{-}(aq)\)

Statement 2: Oxidation no. of Br increases from -1 to 5.

Both Statement 1 and Statement 2 are true but Statement 2 is not the correct explanation of Statement 1
Both Statement 1 and Statement 2 are true and the Statement 2 is correct explanation of the Statement 1
This Statement 1 is true, but the Statement 2 is false
Both Statement 1 and Statement 2 are false

\(Zn^{2+}(aq)+2e \rightarrow Zn(s)\). It indicates which of the following process?

Redox reaction
Oxidation
Reduction
None of these

Chemistry Class 11 QBank

Chemistry Chapter 9 Mock Test

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