Refer to CBSE Class 12 Chemistry The d and f Block Elements MCQs Set E provided below available for download in Pdf. The MCQ Questions for Class 12 Chemistry with answers are aligned as per the latest syllabus and exam pattern suggested by CBSE, NCERT and KVS. Unit 4 The d- and f-Block Elements Class 12 MCQ are an important part of exams for Class 12 Chemistry and if practiced properly can help you to improve your understanding and get higher marks. Refer to more Chapter-wise MCQs for CBSE Class 12 Chemistry and also download more latest study material for all subjects
MCQ for Class 12 Chemistry Unit 4 The d- and f-Block Elements
Class 12 Chemistry students should refer to the following multiple-choice questions with answers for Unit 4 The d- and f-Block Elements in Class 12.
Unit 4 The d- and f-Block Elements MCQ Questions Class 12 Chemistry with Answers
Question: Which of the following types of metals form the most efficient catalysts ?
(a) Alkali metals
(b) Alkaline earth metals
(c) Transition metals
(d) All of these
Answer: c
Question: The highest oxidation state exhibited by transition metals is
(a) + 7
(b) + 8
(c) + 6
(d) + 5
Answer: b
Question: Which metal gives hydrogen gas on heating with hot concentrated alkali ?
(a) Ag
(b) Ni
(c) Zn
(d) Cu
Answer: c
Question: Magnetic moment of manganese in (NH4)2 MnBr2 is
(a) 3.87 BM
(b) 5.91 BM
(c) 4.89 BM
(d) 2.82 BM
Answer: b
Question: Which one of the following reactions will occur on heatmg AgNO3 above its melting point?
(a) 2AgNO3 → 2Ag + 2NO2 + O2
(b) 2AgNO3 → 2Ag + N2 + 3O2
(c) 2AgNO3 → 2AgNO2 + O2
(d) 2AgNO3 → 2Ag + 2NO + 2O2
(e) 2AgNO3 → Ag2O + N2O3 + O2
Answer: c
Question: The highest magnetic moment is shown by the transition metal ion with the configuration
(a) 3d2
(b) 3d5
(c) 3d7
(d) 3d9
Answer: b
Question: Which of the following is philosopher’s wool?
(a) ZnO
(b) HgO
(c) Ag2O
(d) CuO
Answer: a
Question: Ferrous sulphate (FeSO4 · 7H2O) is known as
(a) vermillion
(b) Glauber’s salt
(c) green vitriol
(d) Mohr’s salt
Answer: c
Question: In photography we use
(a) Agl
(b) NH3
(c) AgCl
(d) AgBr
Answer: d
Question: Which of the following ions is colourless in solution ?
(a) V3+
(b) Cr3+
(c) Co2+
(d) Sc3+
Answer: d
Question: Due to lanthanide contraction
(a) Fe, Co, Ni have equal size
(b) Zr and Hf have equal size
(c) all ƒ-block ions have equal size
(d) all isoelectric ions have equal size
Answer: b
Question: Bronze is a mixture of
(a) Pb + Sn
(b) Cu + Sn
(c) Cu + Zn
(d) Pb + Zn
Answer: b
Question: Effective magnetic moment of Sc3+ ion is
(a) 1.73
(b) 0
(c) 5.92
(d) 2.83
(e) 3.87
Answer: b
Question: The magnetic moment of Cu2+ ion is
(a) 2.73
(b) zero
(c) 1.93
(d) 1.73
Answer: d
Question: The ‘spin-only’ magnetic moment [in units of Bohr magneton, (μβ )] of Ni2+ in aqueous solution would be (Atomic number of Ni = 28)
(a) 2.84
(b) 4.90
(c) 0
(d) 1.73
Answer: a
Question: ‘Hydride gap’ is referred to which region of the periodic table ?
(a) Groups 3, 4 and 5
(b) Groups 5, 6 and 7
(c) Groups 4, 5 and 6
(d) Groups 7, 8 and 9
(e) Groups 6, 7 and 8
Answer: d
Question: Which of the following transition metal ions will have definite value of magnetic moment ?
(a) Sc3+
(b) Ti3+
(c) Cu3+
(d) Zn2+
Answer: b
Question: Which of the following ions has a magnetic moment of 5.93 BM ?
(Atomic number V = 23, Cr= 24, Mn= 25, Fe = 26)
(a) Mn2+
(b) Fe2+
(c) Cr2+
(d) y3+
(e) Cr3+
Answer: a
Question: Which of the following is used as purgative?
(a) HgS
(b) Hg2Cl2
(c) HgCl2
(d) ZnSO4
Answer: a
Question: Potassium permanganate acts as an oxidant in alkaline and acidic medium. The final products formed from KMnO4 in the two conditions are respectively
(a) MnO2- and Mn3+
(b) Mn3+ and Mn2+
(c) Mn2+ and Mn3+
(d) MnO2 and Mn2-
(e) Mn2+, MnO2
Answer: d
Question: Mohr salt is made up of which combination of salt ?
(a) Ammonium sulphate and potash
(b) Ammonium sulphate and fe1Tous sulphate
(c) Ammonium sulphate and copper sulphate
(d) Ammonium sulphate and magnesium sulphate
Answer: b
Question: Which one of the following statements is not true with regard to transition elements ?
(a) They readily form complex compounds
(b) They show variable oxidation states
(c) All their ions are colourless
(d) Their ions contain partially filled d-electrons
Answer: c
Question: Mone! metal is an alloy of
(a) Cu, Ni, Fe, Mn
(b) Cu, Sn, Zn
(c) Cu, Sn, P
(d) Cu, Zn
Answer: a
Question: Which of the following group of transition metals is called coinage metals ?
(a) Cu, Ag, Au
(b) Ru, Rh, Pd
(c) Fe, Co, Ni
(d) Os, Ir, Pt
Answer: a
Question: Which of the following pair of transition metal ions, have the same calculated values of magnetic moment?
(a) Ti2+ and V2+
(b) Fe2+ and Cu2+
(c) Cr2+ and Fe2+
(d) Co2+ and Ti2+
Answer: c
Question: The gas obtained by reaction of K4Fe(CN)6 with cone. H2SO4 is
(a) H2S
(b) CO
(c) NO2
(d) CO2
Answer: b
Question: Formation of coloured ions by transition metals signifies
(a) absorption of light from UV range
(b) emission of light
(c) presence of unpaired electrons in sand p-orbitals
(d) complimentary colours to the absorbed light
Answer: d
Question: Among the following the compound that is both paramagnetic and coloured is
(a) K2Cr2O7
(b) (NH4 )2 [TiCl6 ]
(c) VOSO4
(d) K3[Cu(CN)4 ]
Answer: c
Question: Which of the following is not a characteristic of transition elements ?
(a) Variable oxidation states
(b) Formation of coloured compounds
(c) Formation of interstitial compounds
(d) Natural radioactivity
Answer: d
Question: The oxidation number of Mn in the product of alkaline oxidative fusion of MnO2 is
(a) 2
(b) 3
(c) 4
(d) 6
Answer: d
Question: Among the following, the coloured compound is
(a) CuCl
(b) K3[Cu(CN)4]
(c) CuF2
(d) [Cu(CH3CN)4]BF4
Answer: c
Question: Hair dyes contain
(a) coppernitrate
(b) gold chloride
(c) silver nitrate
(d) copper sulphate
Answer: c
CBSE Class 12 Chemistry Amines MCQs Set A |
CBSE Class 12 Chemistry Amines MCQs Set B |
CBSE Class 12 Chemistry Amines MCQs Set C |
MCQs for Unit 4 The d- and f-Block Elements Chemistry Class 12
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