Inorganic Chemistry - Class 12th - Practice MCQs
Inorganic Chemistry - Class 12th - Practice MCQs
Inorganic Chemistry - Class 12th - Practice MCQs
1 Generally transition elements and their salts are 5 A brown ring is formed in the ring test for
−
NO
3
coloured due to the presence of unpaired electrons in ion. It is due to the formation of-
metal ions. Which of the following compounds are 1. [Fe (H2 O) (NO)]
2+
coloured?
5
2. FeSO4 . NO2
a. KMnO4
2+
d. Cu2Cl2
Choose the correct option 6 The oxidation state of the central atom in the anion
1. (a, b)
2. (b, c) of the compound NaH 2 PO2 will be-
3. (c, d) 1. +3
4. (a, d) 2. +5
3. +1
4. -3
2 General electronic configuration of actionoids is (n–
2)f 1–14 (n-1)d0–2ns2.Which of the following actinoids 7 A black compound of manganese reacts with a
have one electron in 6d orbital? halogen acid to give greenish-yellow gas. When an
a. U (Atomic no. 92) excess of this gas reacts with NH an unstable trihalide
3
b. Np (Atomic no.93) is formed. In this process, the oxidation state of nitrogen
c. Pu (Atomic no. 94) changes from-
d. Am (Atomic no. 95) 1. -3 to +3
Choose the correct option 2. -3 to 0
1. (a, b) 3. -3 to +5
2. (b, c) 4. 0 to -3
3. (c, d)
4. (a, d)
8 Which of the following is isoelectronic pair?
3 Which of the following lanthanoids show +2 1. ICl , ClO 2 2
2. BrO , BrF
− +
3. ClO , BrF
+3 of lanthanoids? 2
4. CN , O
−
(a) Ce 3
(b) Eu
(c) Yb
(d) Ho 9 Which of the following statements are correct for
Choose the correct option SO2 gas?
1. (a, b) a. It acts as a bleaching agent in moist conditions.
2. (b, c) b. Its molecule has linear geometry.
3. (c, d) c. Its dilute solution is used as a disinfectant.
4. (a, d) d. It can be prepared by the reaction of dilute H2SO4
with metal sulphide.
1. (a, b)
4 On heating lead nitrate forms oxides of nitrogen and 2. (b, c)
lead. The oxides formed are- 3. (c, d)
1. N O, PbO
2 4. (a, c)
2. NO2 , PbO
3. NO, PbO
4. NO, PbO2
Page: 1
Inorganic Chemistry - Class Contact Number:
12th - Practice MCQs 9667591930 / 8527521718
10 Which of the following statements are true? 14 When KM nO4 solution is added to oxalic acid
a. Only types of interactions between particles of noble solution, the decolourisation is slow in the beginning but
gases are due to weak dispersion forces. becomes instantaneous after some time because
b. Ionization enthalpy of molecular oxygen is very close 1. CO is formed as the product
2
1. (a, b)
2. (b, c)
3. (c, d) 15 Which of the following is amphoteric oxide ?
4. (a, d) 1. V2 O5 , Cr2 O3
2. M n2 O7 , CrO3
2. Both the assertion and the reason are correct with KI , iodide ion is oxidised to . . . . . . . . . .
4
correct statement.
which is highly explosive in nature. Identify 1. Fluorine is more electronegative than oxygen
the compound from the following. 2. Fluorine does not possess d orbitals
1. Mn2O7 3. Fluorine stabilises lower oxidation state
2. MnO2 4. In covalent compounds, fluorine can form single
3. MnSO4 bond only while oxygen forms double bond
4. Mn2O3
18 Why is HCl not used to make the medium acidic in
oxidation reactions of KM nO in acidic medium?4
4 2
for all lanthanoids? oxidising agent
1. +2 3. KM nO is a weaker oxidising agent than HCl
2. +3
4
HCl
4. +5
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Inorganic Chemistry - Class Contact Number:
12th - Practice MCQs 9667591930 / 8527521718
19 Match the property given in Column I with the 21 Assertion: Actinoids form relatively less stable
element given in Column II. complexes as compared to lanthanoids.
Reason: Actinoids can utilise their 5f orbitals along with
6d orbitals in bonding but lanthanoids do not use their 4f
Column orbital for bonding.
Column I
II 1. Both assertion and reason are true, and the reason is
( Property) the correct explanation of the assertion.
2. Both assertion and reason are true but the reason is
(Element) not the correct explanation of assertion.
3. Assertion is not true but the reason is true.
4. Both assertion and reason are false.
A. Lanthanoid which shows + 4 oxidation
1. Pm
state
22 Which of the following complexes formed by Cu++
B. Radioactive lanthanoid ions is most stable?
2. Ce 1. Cu 2+
+ 4 NH → [Cu (NH
+2
logK = 11.6
3 3) ]
4
2−
2. Cu 2+
+ 4 CN
−
→ [Cu (CN) ]
4
logK = 27. 3
2+
2. Pt (NH ) Cl
20 Assertion (A) Separation of Zr and Hf is difficult. 3
3
3+
Reason (R) Because Zr and Hf lie in the same group of 3. [Co (NH 3
) ]
6
3. NH CH CH NH
2 2 2 2
4. CO
Page: 3
Inorganic Chemistry - Class Contact Number:
12th - Practice MCQs 9667591930 / 8527521718
26 Which of the follwing options are correct for 28 Match the complex ions give in Column I with the
[F e(CN ) ] is
3−
colours given in column II and assign the correct code.
6
a. d sp hybridisation
2 3
Column I Column II
b. d sp hybridisation
2 2
+
(b) [Fe (NH 3 )4 Cl2 ] 2+
4. Yellowish orange
4−
D. [Ni (H 2 O)4 (en)]
Column I Column II
A. Chlorophyll 1. Rhodium
B. Blood pigment 2. Cobalt
C. Wilkinson's catalyst 3. Magnesium
D. Vitamin B12 4. Iron
Codes
A B C D
1. 2 3 4 1
2. 3 4 1 2
3. 1 4 3 2
4. 4 1 3 2
Page: 4
Inorganic Chemistry - Class Contact Number:
12th - Practice MCQs 9667591930 / 8527521718
30 Match the complex species given in Column I with 33 Zone refining is based on the principle that ..........
the possible isomerism given in Column II and assign 1. Impurities of low boiling metals can be separated by
the correct code. distillation.
2. Impurities are more soluble in molten metal than in
Column I Column II solid metal.
3. Different components of a mixture are differently
(Complex species) (Isomerism) adsorbed on an adsorbent.
4. Vapours of volatile compound can be decomposed in
+
pure metal.
A.[Co (NH 3)
4
Cl2 ] 1. Optical isomerism
+
34 Extraction of gold and silver involves leaching the
B. cis − [Co (en) 2
Cl2 ] 2. lonisation Isomerism metal with CN ion. The metal is recovered by ......
−
31 Assertion:
3−
[Fe (CN) ] ion shows magnetic
6
Page: 5
Inorganic Chemistry - Class Contact Number:
12th - Practice MCQs 9667591930 / 8527521718
36 Which of the following ores can be reduced by 39 Match the items in Column I with the items in
carbon? Column II, and assign the correct code.
a. Haematite
b. Zincite Column I Column II
c. Iron pyrites
d. Sphalerite
Choose the correct option: A. Cyanide process 1. Ultrapure Ge
1. (a, b)
2. (b, c)
3. (c, d) B. Froth flotation process 2. Dressing of ZnS
4. (a, d)
C. Electrolytic reduction 3. Extraction of Al
37 Which of the following statements are correct?
a. A depressant prevents certain type of particle to come D. Zone refining 4. Extraction of Au
to the froth.
b. Copper matte contains Cu S and ZnS.
2
Page: 6
Inorganic Chemistry - Class Contact Number:
12th - Practice MCQs 9667591930 / 8527521718
42 The correct statement for the reduction of FeO at 45 Which of the following complexes is used as an
the temperature corresponding to point D is: anticancer agent ?
1. mer − [Co(N H ) Cl] 3 3
2. Cis − [P tCl (N H ) ]
2 3 2
3. Cis − K [P t Cl Br ]
2 2 2
4. N H CoCl
2 4
2. NO −
3. SCN −
4. NH 3
1. One
2. Two
43 When Cl2 gas reacts with hot and concentrated 3. Three
sodium hydroxide solution, the oxidation number of 4. Four
chlorine changes from
1. zero to +1 and zero to -5
2. zero to -1 and zero to +5
3. zero to -1 and zero to +3
4. zero to +1 and zero to -3
44
Actinoids exhibit more number of oxidation states than
the lanthanoids. It is because of
Page: 7
Inorganic Chemistry - Class Contact Number:
12th - Practice MCQs 9667591930 / 8527521718
49 Note: In the following questions match the items 52 The total number of geometrical isomers possible
given in Columns I and II. for an octahedral complex of this type [MA B C ] is 2 2 2
Match the compounds given in Column I with the (M = transition metal; A, B and C are monodentate
oxidation state of cobalt present in it (given in Column ligands)
II) and assign the correct code. 1. 3
2. 4
Column II (Oxidation 3. 5
Column I (Compound)
state of Co) 4. 6
A. [Co(NCS)(NH 3
) ](SO3 )
5
1. +4 53 In aqueous solution, [Co (H (X) reacts with
2 O) ]
2+
D. [Co 2
(CO) ]
8
4. +2
54 Among the following, the π-acid ligand is
1. F−
5. +3 2. NH 3
3. CN −
4. l
1. A (1) B (2) C (4) D (5)
2. A (4) B (3) C (2) D (1)
3. A (5) B (1) C (4) D (2)
4. A (4) B (1) C (2) D (3)
55 Arrange the following in order of decreasing
number of unpaired electrons:
2+ 3−
(I) [Fe (H 2 O)6 ] (II) [Fe (CN ) 6
]
4− 3+
(III) [Fe (CN ) ] (IV) [Fe (H O) ] 6
2
6
50 A chelating agent has two or more than two donor 1. IV, I, II, III
2. I, II, III, IV
atoms to bind to a single metal ion. Which of the 3. III, II, I, IV
following is not a chelating agent? 4. II, III, I, IV
1. Thiosulphato
2. Oxalato
3. Glycinato 56 [Fe Cl (CN) (O )] is named as: II
4−
4. Ethane-1,2-diamine 4 2
2.
2+
2− 57 Which among the following complexes can exhibit
Cu + 4 CN– ⇌ [Cu (CN) ]
4
, logK = 27. 3
isomerism?
3. 1. [Ag(NH3)2]+
2+
Cu
2+
+ 2 en ⇌ [Cu (en) ]
2
, logK = 15. 4 2. [Co(NH3)5NO2]2+
4. 3. [Pt(en)Cl2]
4. [Co(NH3)5Cl2]+
2+
2+
Cu + 4H2 O ⇌ [Cu (H2 O) ] , logK = 8. 9
4
Page: 8
Inorganic Chemistry - Class Contact Number:
12th - Practice MCQs 9667591930 / 8527521718
58 A complex shown below can exhibit – 62 Match the items of Columns I and II and mark the
correct option.
Column I
Column II
(A) Its partial hydrolysis does not
(i) He
change oxidation state of central atom
(B) It is used in modern diving apparatus
(ii) XeF6
1. Geometrical isomerism only (C) It is used to provide inert atmosphere
2. Optical isomerism only (iii) XeF4
3. Both Optical and geometrical isomerism
for filling electrical bulbs
4. None of the above
(D) Its central atom is in sp3d2 hybridisation
(iv) Ar
59 In which of the following coordination entities the 1. A(i) B(iv) C(ii) D(iii)
2. A(i) B(ii) C(iii) D(iv)
magnitude of A.(CFSE in octahedral field) will be
3. A(ii) B(i) C(iv) D(iii)
maximum?
4. A(i) B(iii) C(ii) D(iv)
(Atomic number Co = 27)
3+
1. [Co (H O) ] 2
6
3. [Co (CN) ]
3−
catalytic oxidation of ammonia.
6
3− The moles of NO produced by the oxidation of two
4. [Co (C2 O4 ) ]
3 moles of NH3 will be ______.
1. 2
2. 3
60 In Fe (CO)5, the Fe-C bond possesses 3. 4
1. ionic character 4. 6
2. σ-character only
3. π-character only
4. both σ and π character 64 Maximum covalency of nitrogen is
______________.
1. 3
61 In which of the following arrangement, the order is 2. 5
not according to the property indicated against it 3. 4
Oxidising 4. 6
1. F > Cl > Br > I
2 2 2 2
agent
Basic
2. NH > PH > AsH > SbH > BiH
3 3 3 3
property
3
65 Which is mismatched with respect to the shapes of
Electron the compounds given?
3. F > Cl > Br > I gain
enthalpy (1) XeF4 = Squar planar
Ability (2) XeOF4 = Square Pyramidal
form (3) XeF6 = Distorted Octahedral
4. C > Si > Ge > Sn
pπ − pπ
(4) XeO3 = Bent Shape
bond
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Inorganic Chemistry - Class Contact Number:
12th - Practice MCQs 9667591930 / 8527521718
3. OF 4
4. A-(iii) B-(iv) C-(i) D-(ii)
4. SF 4
2. O molecule is bent
3
4. OF is an oxide of fluorine
2
74 Vitamin- B12 contains
2
1. Zn (II)
2. Ca (II)
3. Fe (II)
4. Co (II)
Page: 10
Inorganic Chemistry - Class Contact Number:
12th - Practice MCQs 9667591930 / 8527521718
75 Which of the following reactions is a part of large 80 Assertion(A): ICl is more reactive than I2 .
scale industrial preparation of nitric acid? Reason(R): I−Cl bond in ICl is weaker than I−I bond in
1. NaNO + H2 SO4 −−−−−
Pt
500 K, 9 bar 1. Both assertion and reason are true, and reason is the
2. 4NH 3 + 5O2
Pt
7
′ ′
3 5
′
3
′
5 7
′
5
′
7
′
3
′
chlorine.
Page: 11
Inorganic Chemistry - Class Contact Number:
12th - Practice MCQs 9667591930 / 8527521718
86 Which of the following group 18 elements does not 91 Match coloum-I with column II : Column-I and II
form fluoride? represents complexes and magnetic moment (BM)
1. He respectively
2. Xe Column -I Column -II
3. Kr A. K3[FeF6] I. 1.73
4. Rn
B. [Co(NH3)6]Cl3 II. 5.9
2 6 2 C. [Ni(H O) ]Cl III. 0.0
87 Which of the following matches between the D. K [Mn(CN) ]
4 6 IV. 2.9
process and the catalyst used is incorrect?
1. Contact process - V O 2 5
2. Haber's process - Mo Choose the correct answer from the options given below
3. Catalytic hydrogenation- Ni 1. A-II; B-III, C-IV, D-I
4. Stephen reaction-SnCl 2. A-II; B-III, C-I, D-IV
2
3. A-I; B-III, C-IV, D-II
4. A-I; B-IV, C-III, D-II
88 Which one of the following statements is correct?
1. Ce4+
is a strong reductant
92 Columns I and II represent metal ions and the
2. Eu 2+
is a strong oxidant
number of electrons in the outermost shell
3. Y b
2+
is a reductant
4. T b
4+
is a reductant Column -I Column -II
A. Mn3+ I. 3
B. V3+ II. 4
89 You are given the following complexes:
C. Cr3+ III. 1
[MnCl6 ]
3−
and [CoF ]
, [FeF6 ]
3−
6
3−
Page: 12
Inorganic Chemistry - Class Contact Number:
12th - Practice MCQs 9667591930 / 8527521718
95 Select the correct order for the decreasing 99 Compound that is used for the product of UF6 in the
wavelength absorption in the visible region for the enrichment of 235U :
following complexes: 1. ICl3
1.
4− 2−
2. BrF5 2+ 2+
[N i(N O ) ]
2
> [N i(CN ) ]
6
> [N i(N H ) ]
4
> [N i(H O) ] 3 6 2 6
2. 3. ClF5
[N i(CN ) ] 4
2−
> [N i(H O) ] > [N i(N H ) ]
2 6
2+ 4. ClF]
> [N i(N O ) 3 3 6
2+
2 6
4−
3.
2+ 2+ 2− 4−
[N i(H2 O)6 ] > [N i(N H3 )6 ] > [N i(CN )4 ] > [N i(N O2 )6 ]
2. Kr
3. Rn
96 Which of the following principle does the refining 4. Ne
of Zirconium metal?
1. Low melting metal can be made to flow on a sloping
surface and is separated from high melting impurities
2. Impurities are more soluble in the melt than in the
Fill OMR Sheet*
solid state of the metal
3. Metal is heated in a stream of CO and forms a *If above link doesn't work, please go to test link from
complex, which is decomposed to give the pure metal where you got the pdf and fill OMR from there. After
4. The crude metal is heated in an evacuated vessel with filling the OMR, you would get answers and explanations
iodine, then the metal iodide is decomposed to give the for the questions in the test.
pure metal
Page: 13