Class 11 Chemistry Chapter 3 MCQ. We covered all the Class 11 Chemistry Chapter 3 MCQ in this post for free so that you can practice well for the exam.
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Class 11 Chemistry Chapter 3 Objective MCQ for Students
The orbital motion of electrons is quenched more in
(A) Pm
(B) Sm
(C) Ti
(D) None of these
Option c – Ti
The stability of a particular oxidation state of a metal in an aqueous solution is determined by ( Class 11 Chemistry MCQ )
(A) Enthalpy of sublimation of the metal
(B) Ionization energy
(C) Enthalpy of hydration of the metal ion
(D) All of these
Option d – All of these
Which of the following compounds is (are ) colored due to charge transfer spectra and not due to d-d transition?
(A) K2Cr2O7
(B) KMnO4
(C) Both (A) & (B)
(D) None of these
Option b – Both (A) & (B)
The correct formula of permanganic acid is ( Class 11 Chemistry MCQ )
(A) HMnO4
(B) HMnO5
(C) H₂MnO4
(D) H₂MnO3
Option a – HMnO4
In the lanthanide series, the basicity of the lanthanide hydroxides
(A) Increases
(B) Decreases
(C) First increase and then decrease
(D) First decrease and then increases
Option b – Decreases
Which of the following compounds is used as the starting material for the preparation of potassium dichromate ( Class 11 Chemistry MCQ )
(A) K2SO4.Cr2(SO4)3.24H2O (Chrome alum)
(B) PbCrO4 (Chrome yellow)
(C) FeCr204 (Chromite)
(D) PbCrO4PbO (Chrome re(D)
Option c – FeCr204 (Chromite)
The starting material for the manufacture of KMnO4 is
(A) Pyrolusite
(B) Manganite
(C) Magnetite
(D) Haematite
Option a – Pyrolusite
Which of the following is ionic in nature ( Class 11 Chemistry MCQ )
(A) CuF2
(B) CuCl2
(C) CuBr2
(D) None of these
Option a – CuF2
Out of AgNO3, AgF, and AgCIO4, water-soluble salts are :
(A) AgF
(B) AgF, AgNO3
(C) AgF, AgNO3, AgClO4
(D) none of the above
Option c – AgF, AgNO3, AgClO4
When an intimate mixture of potassium dichromate and potassium chloride is heated with conc. H2SO4 which of the following is produced in the form of red vapors ( Class 11 Chemistry MCQ )
(A) CrO3
(B) Cr203
(C) CrO2Cl2
(D) CrCl3
Option c – CrO2Cl2
Which oxide of manganese is acidic in nature
(A) MnO
(B) Mn2O7
(C) Mn2O3
(D) MnO2
Option b – Mn2O7
Which one of the following transition metal ions has the lowest density? ( Class 11 Chemistry MCQ )
(A) Copper
(B) Nickel
(C) Scandium
(D) Zinc
Option c – Scandium
Which of the following oxide of manganese is amphoteric?
(A) MnO₂
(B) Mn2O3
(C) Mn207
(D) MnO
Option a – MnO₂
The last electron in d-bloc – elements ( Class 11 Chemistry MCQ )
(A) (n-1)d
(B) nd
(C) np
(D) (n-1)s
Option a – (n-1)d
Mercury sticks to the surface of the glass when it comes in contact with
(A) Hg₂O
(B) HNO3
(C) O3
(D) Grease
Option c – O3
Excess of KI reacts with CuSO4 solution and then Na2S2O3 solution is added to it. Which of the statements is incorrect for this reaction? ( Class 11 Chemistry MCQ )
(A) Cu2l2 is formed
(B) Cul2 is formed
(C) Na2S2O3 is oxidized
(D) Evolved I2 is reduced
Option b – CuI2 is formed
Calomel (Hg2Cl2) in reaction with ammonium hydroxide gives
(A) HgNH₂Cl
(B) NH2-Hg – Hg – Cl
(C) Hg2O
(D) HgO
Option a – HgNH₂Cl
Amongst the following, the lowest degree of paramagnetism per mole of the compound at 298 K will be shown by ( Class 11 Chemistry MCQ )
(A) MnSO4 4H₂O
(B) CuSO4 5H₂O
(C) FeSO4 6H2O
(D) NiSO4 6H₂O
Option b – CuSO4 5H₂O
Transition metal with low oxidation number will act as
(A) a base
(B) an acid
(C) an oxidizing agent
(D) none of these
Option b – an acid
Iron loses ferromagnetic property at ( Class 11 Chemistry MCQ )
(A) Curie point
(B) Boiling point
(C) Melting point
(D) 1500 K
Option a – Curie point
Which of the following is not the characteristic of zinc?
(A) It is a volatile metal
(B) It dissolves in alkali forming sodium zincate
(C) It is brittle at very high temperatures
(D) Zinc dust is used as a reducing agent
Option c – It is brittle at very high temperatures
Formation of the interstitial compound makes the transition metal ( Class 11 Chemistry MCQ )
(A) more soft
(B) more ductile
(C) more metallic
(D) more hard
Option d – more hard
If a non-metal is added to the interstitial sites of a metal, then the metal becomes
(A) softer
(B) less tensile
(C) less malleable
(D) more ductile
Option c – less malleable
In order to prepare one liter of one normal solution of KMnO4, how many grams of KMnO4 is required, if the solution is to be used in the acid medium for oxidation?
(A) 158 g
(B) 31.60 g
(C) 62.0 g
(D) 790 g
Option b – 31.60 g
Which of the following is ionic in nature?
(A) CuF2
(B) CuCl2
(C) CuBr2
(D) None of these
Option a – CuF2
There are 14 elements in the actinoid series. Which of the following elements does not belong to this series?
(A) U
(B) Np
(C) Tm
(D) Fm
Option c – Tm
Which of the following is amphoteric oxide? Mn2O7, CrO3, Cr2O3, CrO, V2O5, V2O4
(A) V2O5, Cr2O3
(B) Mn207, CrO3
(C) CrO, V2O5
(D) V2O5, V2O4
Option a – V2O5, Cr2O3
Generally, transition elements form colored salts due to the presence of unpaired electrons. Which? of the following compounds will be colored in a solid state?
(A) Ag2SO4
(B) CuF2
(C) ZnF2
(D) Cu₂Cl₂
Option b – CuF2
In addition to a small amount of KMnO4 to concentrated H₂SO4, a green oily compound is obtained which is highly explosive in nature. Identify the compound from the following
(A) Mn2O7
(B) MnO₂
(C) MnSO4
(D) Mn2O3
Option a – Mn2O7
Which of the following oxidation state is common for all lanthanoids?
(A) +2
(B) +3
(C) +4
(D) +5
Option b – +3
The oxygen-carrying pigment, oxyhaemocyarin, containing two copper ions is diamagnetic, because :
(A) the two copper ions are in a +1 oxidation state
(B) one of the copper ions is in a +1 oxidation state and the other is in a +2 oxidation state
(C) there are strong anti-ferromagnetic interactions between the two copper ions
(D) there are ferromagnetic interactions between the two copper ions
Option a – the two copper ions are in a +1 oxidation state
Which of the following oxides will not give metal on heating :
(A) HgO
(B) ZnO
(C) Ag2O
(D) all
Option b – ZnO
The common oxidation state of the elements of the lanthanide series is
(A) + 2
(B) + 3
(C) + 4
(D) + 1
Option b – + 3
In a neutral medium, the equivalent mass of KMnO4 is……… its molecular mass
(A) 1/3rd
(B) 1/6th
(C) 1/2
(D) None of these
Option a – 1/3rd
KMnO4 is ……… soluble in water
(A) Highly
(B) Insoluble
(C) Partially
(D) None of these
Option c – Partially
Platinum metals are
(A) Ru and Os
(B) Rh and Ir
(C) Pd and Pt
(D) All of these
Option d – All of these
An example of an ionic compound is
(A) CuCl2
(B) CuF2
(C) CuBr2
(D) All of these
Option b – CuF2
When MnO2 is fused with KOH, a colored compound is formed, and the product and its color is
(A) K₂MnO4, green
(B) KMnO4, purple
(C) Mn203, brown
(D) Mn304, black
Option a – K₂MnO4, green
When (i) NH4VO3 is heated. ii) (NH4)2 Cr2O7 is heated :
(A) in both cases, N₂ is formed
(B) in both cases, NH3 is formed
(C) in (i) NH3 and in (ii) N₂ are formed
(D) in (i) N₂ and in (ii) NH3 are formed
Option c – in (i) NH3 and in (ii) N₂ are formed
Pyrolusite is chemically
(A) MnO
(B) Mn2O3
(C) MnO2
(D) None of these
Option c – MnO2
With the increase in atomic number the ionic radii of actinides :
(A) contract slightly
(B) increase gradually
(C) show no change
(D) change irregularly
Option a – contract slightly
The nonexistent oxide of Vanadium is
(A) V₂O3
(B) VO2
(C) V3O2
(D) VO
Option c – V3O2
An example of acidic oxide is
(A) Mn2O3
(B) Mn3O4
(C) V3O2
(D) None of these
Option d – None of these
Coagulation of blood takes place by :
(A) Ferric alum
(B) potash alum
(C) both A and B
(D) none
Option c – both A and B
When H₂O2 is added to an acidified solution of K₂Cr₂O7 :
(A) the solution turns green due to the formation of Cr2O3
(B) the solution turns yellow due to the formation of K₂CrO4
(C) a deep blue-violet colored compound Cro (O2)2 is formed
(D) the solution gives green ppt. of Cr(OH)3
Option c – a deep blue-violet colored compound Cro (O2)2 is formed
Select the element in the following which does not show a +4 oxidation state :
(A) Ti
(B) Zr
(C) La
(D) Pt
Option c – La
Calomel on reaction with NH4OH gives
(A) HgNH₂Cl
(B) NH2-Hg-Hg-Cl
(C) Hg2O
(D) HgO
Option a – HgNH₂Cl
Which of the following statement (s) is (are) correct when a mixture of NaCl and K₂Cr2O7 is gently warmed with conc. H₂SO4?
(A) A deep red vapor is evolved
(B) The vapor when passed into the NaOH solution gives a yellow solution of Na2CrO4
(C) Chromyl chloride is formed
(D) All of these
Option d – All of these
In the dichromate dianion
(A) 4, Cr-O bonds are equivalent
(B) 6, Cr-O bonds are equivalent
(C) All, Cr-O bonds are equivalent
(D) All, Cr-O bonds are non-equivalent
Option b – 6, Cr-O bonds are equivalent
Which of the following compounds exhibit the same color in the aqueous solution?
(A) VOCl₂ & FeCl₂
(B) FeCl2 & CuCl2
(C) MnCl2 & FeCl2
(D) VOCl₂ & CuCl₂
Option d – VOCl₂ & CuCl₂
Reduction of the metal center in aqueous permanganate ion involves
(A) 3 electrons in a neutral medium
(B) 5 electrons in an acidic medium
(C) 3 electrons in an alkaline medium
(D) All of these
Option d – All of these
The color of light absorbed by an aqueous solution of CuSO4 is
(A) orange-red
(B) blue-green
(C) yellow
(D) violet
Option a – orange-red
Which of the following hydrogen halides react(s) with AgNO3(aq) to give a precipitate that dissolves in Na2S2O3(aq)?
(A) HCI
(B) HI
(C) HBr
(D) All of these
Option d – All of these
The elements from thorium (At. No. 90) to lawrencium (At. No. 103) in which 5f energy levels are filled up are called :
(A) lanthanides
(B) rare earth
(C) actinides
(D) transuranic
Option c – actinides
CuSO4.5H2O on heating upto 370K forms
(A) CuSO4 H₂O
(B) CuSO4
(C) CuSO4.3H₂O
(D) Cu₂0
Option a – CuSO4 H₂O
Spitting of silver is due to the absorption of
(A) CO₂
(B) H₂S
(C) H₂
(D) O2
Option d – O2
Purple of Cassius is
(A) AuCl₂
(B) AuCl4
(C) Colloidal gold
(D) None of these
Option c – Colloidal gold
Calamine is chemically
(A) ZnS
(B) ZnCO3
(C) ZnO.Fe2O3
(D) ZnO
Option b – ZnCO3
Excess of KI reacts with CuSO4 solution and then Na2S2O3 solution is added to it. Which of the statements is incorrect for this reaction
(A) Evolved I2 is reduced
(B) Cul2 is formed
(C) Na2S203 is oxidised
(D) Cu2l2 is formed
Option b – Cul2 is formed
Ammonium dichromate on heating forms
(A) Cr₂O3
(B) N₂
(C) None
(D) Both (A) & (B)
Option d – Both (A) & (B)
Stellite, an alloy of chromium contains
(A) Co
(B) W
(C) Both (A) & (B)
(D) All of these
Option c – Both (A) & (B)
Transition elements are frequently used as catalysts because of
(A) Large ionic charge
(B) Large surface area for the reactants to be absorbed
(C) Unpaired d-electrons
(D) Both (B) and (C) are correct
Option d – Both (B) and (C) are correct
The transition element not resistant to corrosion is
(A) Fe
(B) Ni
(C) Co
(D) All of these
Option a – Fe
The element present in red blood cells of a man is
(A) Fe
(B) Ra
(C) Co
(D) All of these
Option a – Fe
Iron is rendered passive by treatment with
(A) Conc. HCI
(B) Conc. HNO3
(C) Conc. HNO2
(D) All of these
Option b – Conc. HNO3
Rusting of iron in moist air involves
(A) Loss of electrons by Fe
(B) Gain of electrons by Fe
(C) Neither gain nor loss of electrons
(D) Hydrogenation of Fe
Option a – Loss of electrons by Fe
Mond’s process is used to prepare
(A) Fe
(B) Ni
(C) Co
(D) HNO3
Option b – Ni
Which of the following is only soluble in aqua regia?
(A) Co
(B) Fe
(C) Ni
(D) Au
Option d – Au
Which one of the following metals corrodes readily in moist air?
(A) Au
(B) Ag
(C) Fe
(D) Ni
Option c – Fe
The transition element present in vitamin B12 is
(A) Mg
(B) Co
(C) Zn
(D) Fe
Option b – Co
Chlorine oxidizes sodium thiosulphate to form
(A) Na₂SO3
(B) Na₂O
(C) Na₂SO4
(D) Na₂CO3
Option c – Na₂SO4
Which one of the following statements regarding helium is incorrect?
(A) It is used to fill gas in balloons instead of hydrogen because it is lighter and noninflammable.
(B) It is used as a cryogenic agent for carrying out experiments at low temperatures
(C) It is used to produce and sustain powerful superconducting magnets.
(D) It is used in gas-cooled nuclear reactors.
Option a – It is used to fill gas in balloons instead of hydrogen because it is lighter and noninflammable
Choose the incorrect formula out of the four compounds for an element X given below.
(A) X₂Cl3
(B) X₂03
(C) X2(SO4)3
(D) XPO4
Option a – X₂Cl3
Which compound has a planar structure?
(A) XeF4
(B) XeOF2
(C) XeO₂F2
D) XeO4
Option a – XeF4
Which one of the following reactions of the Xenon compound is not feasible?
(A) XeO3+6HF → XeF6+3H₂O
(B) 3XeF4+6H₂O → 2Xe+XeO3+12 HF +1.5 O2
(C) 2XeF2+2H₂O2 → Xe+4HF + O₂
(D) XeF6+RbF→ Rb(XeF7)
Option a – XeO3+6HF → XeF6+3H₂O
The correct order of solubility in water for He, Ne, Ar, Kr, and Xe is
(A) He > Ne > Ae > Kr> Xe
(B) Xe > Kr> Ar> Ne > He
(C) Ne > Ar> Kr> He > Xe
(D) Ar > Ne > He> Kr> Xe
Option b – Xe > Kr> Ar> Ne > He
In XeF2, XeF4, and XeF6 the number of lone pairs on Xe are respectively?
(A) 2, 3, 1
(B) 1, 2, 3
(C) 4, 1, 2
(D) 3, 2, 1
Option d – 3, 2, 1
Euchlorine is produced by heating a mixture of
(A) KCI +conc. H₂SO4
(B) KCl+conc. HCI
(C) K₂CIO3+conc. H₂SO4
(D) KClO3+conc. HCI
Option d – KClO3+conc. HCl
Which is the strongest acid in the following?
(A) HCIO4
(B) H₂SO3
(C) H₂SO4
(D) HCIO3
Option a – HClO4
The least number of oxyacids are formed by
(A) nitrogen
(B) sulfur
(C) fluorine
(D) chlorine
Option c – fluorine
Which one of the following is responsible for the depletion of the ozone layer in the upper strata of the atmosphere?
(A) Polyhalogens
(B) Ferrocene
(C) Fullerneces
(D) Freons
Option d – Freons
In which of the following molecules are all the bonds not equal?
(A) NF3
(B) CIF3
(C) BF3
(D) AlF3
Option b – ClF3
Tincture iodine is
(A) an aqueous solution of I₂
(B) a solution of I₂ in aqueous KI
(C) alxoholoc solution of I₂
(D) an aqueous solution
Option b – a solution of I₂ in aqueous KI
F₂ formed by reaction K₂MnF6 with
(A) SbF5
(B) MnF3
(C) KSbF6
(D) MnF4
Option a – SbF5
For electron affinity of halogens which of the following is correct?
(A) Br > F
(B) F > Cl
(C) Br > Cl
(D) F > I
Option d – F > I
Which of the following hydrogen halide is the most basic?
(A) HF
(B) HCI
(C) HBr
(D) HI
Option a – HF
Which of the following is true about ClO2?
(A) It is paramagnetic
(B) It dimerizes in the liquid phase
(C) It is a linear molecule
(D) It is very reactive
Option a – It is paramagnetic
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