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MCQ for Full Syllabus Chemistry The D and F Block Elements
Full Syllabus Chemistry students should review the 50 questions and answers to strengthen understanding of core concepts in The D and F Block Elements
The D and F Block Elements MCQ Questions Full Syllabus Chemistry with Answers
Question. Which one of the following ions has electronic configuration [Ar] 3d6
(a) Co3+
(b) Mn3+
(c) Ni3+
(d) Fe3+
Answer: A
Question. Which of the following element does not belong to first transition series?
(a) Ag
(b) Fe
(c) V
(d) Cu
Answer: A
Question. The last electron in d-block elements goes to
(a) (n-1) d
(b) np
(c) nd
(d) (n-1) s
Answer: A
Question. The elements which exhibit both vertical and horizontal similarites are
(a) transition elements
(b) representative elements
(c) inert gas elements
(d) rare elements
Answer: A
Question. The valence shell of transition elements consists of
(a) (n-1) d ns orbitals
(b) (n-1) d orbitals
(c) nd orbitals
(d) ns np nd orbitals
Answer: A
Question. Number of unpaired electrons in Ni2+(Z=28) is
(a) 2
(b) 8
(c) 4
(d) 6
Answer: A
Question. Which of the following element is not a member of transition elements ?
(a) Ce
(b) Zn
(c) Pt
(d) Mo
Answer: A
Question. The number of unpaired electrons in gaseous species of Mn3+, Cr3+ and V3+ respectively are.
(a) 4, 3 and 2
(c) 3, 3 and 2
(d) 3, 3 and 3
Answer: A
Question. The first element in the 3d-transition series is
(a) Sc
(b) V
(c) Ti
(d) Ca
Answer: A
Question. Which one of the following is an example of non-typical transition elements
(a) Zn, Cd, Hg
(b) Li, K, Na
(c) Be, Al, Pb
(d) Ba, Ga, Sr.
Answer: A
Question. Which of the following has the maximum number of unpaired electrons?
(a) Cr+
(b) Ti2+
(c) Fe2+
(d) Cu+
Answer: A
Question. Manganese belongs to
(a) 1st transition series
(b) 3rd transition series
(c) 2nd transition series
(d) 4th transition series
Answer: A
Question. The no. of unpaired electrons in Mn7+ ions (At. no. of Mn = 25) is
(a) 0
(b) 2
(d) 3
Answer: A
Question. Which one of the following species is paramagnetic?
(a) Co
(b) Zn
(c) Cu+
(d) N2
Answer: A
Question. Which of the following species is/are paramagnetic?
Fe2+, Zn0, Hg2+, Ti4+
(a) Fe2+ only
(b) Fe2+ and Hg2+
(c) Zn0 and Ti4+
(d) Zn0 and Hg2+
Answer: A
Question. In first transition series, the melting point of Mn is low because
(a) due to d5 configuration, metallic bonds are weak
(b) None of these
(c) due to d7 configuration, metallic bonds are weak
(d) due to d10 configuration, metallic bonds are strong
Answer: A
Question. The transition metals have a less tendency to form ions due to
(a) All of these
(b) high heat of sublimation
(c) low heat of hydration of ions
(d) high ionisation energy
Answer: A
Question. The common oxidation states of Ti are
(a) + 2, + 3 and + 4
(b) + 3 and + 4
(c) + 2 and + 3
(d) – 3 and – 4
Answer: A
Question. Maximum oxidation state is shown by
(a) Os
(b) Co
(c) Mn
(d) Cr
Answer: A
Question. Which of the following pairs has the same size?
(a) Zr4+ , Hf 4+
(b) Fe2+ , Ni2+
(c) Zr4+ , Ti4+
(d) None of these
Answer: A
Question. For the four successive transition elements (Cr, Mn, Fe and Co), the stability of +2 oxidation state will be there in which of the following order?
(a) Mn > Fe > Cr > Co
(b) Co > Mn > Fe > Cr
(c) Fe > Mn > Co > Cr
(d) Cr > Mn > Co > Fe
Answer: A
Question. Iron exhibits +2 and + 3 oxidation states. Which of the following statements about iron is incorrect ?
(a) Ferrous compounds are more easily hydrolysed than the corresponding ferric compounds
(b) Ferrous compounds are less volatile than the corresponding ferric compounds
(c) Ferrous compounds are relatively more ionic than the corresponding ferric compounds
(d) Ferrous oxide is more basic in nature than the ferric oxide.
Answer: A
Question. Four successive members of the first row transition elements are listed below with their atomic numbers. Which one of them is expected to have the highest third ionization enthalpy?
(a) Manganese (Z = 25)
(b) Vanadium (Z = 23)
(c) Chromium (Z = 24)
(d) Iron (Z = 26)
Answer: A
Question. Of the following outer electronic configurations of atoms, the highest oxidation state is achieved by which one of them
(a) (n – 1)d5 ns2
(b) (n – 1)d5 ns1
(c) (n – 1)d3 ns2
(d) None of these
Answer: A
Question. For d block elements the first ionization potential is of the order
(a) Zn > Fe > Cu > Cr
(b) Zn < Cu < Ni < Co
(c) Sc = Ti < V = Cr
(d) V > Cr > Mn > Fe
Answer: A
Question. Zinc and mercury do not show variable valency like d-block elements because
(a) their d-shells are complete
(b) they are soft
(c) they have only two electrons in the outermost subshell
(d) their d-shells are incomplete
Answer: A
Question. Which of the following transition element shows the highest oxidation state ?
(a) Mn
(b) V
(c) Fe
(d) Cr
Answer: A
Question. Which of the following elements does not showvariable oxidation states?
(a) Zinc
(b) Copper
(c) Iron
(d) Titanium
Answer: A
Question. Which one of the following transition elements does not exhibit variable oxidation state?
(a) Sc
(b) Cu
(c) Ni
(d) Fe
Answer: A
Question. Electronic configuration of a transition element X in +3 oxidation state is [Ar]3d5. What is its atomic number ?
(a) 26
(b) 24
(c) 25
(d) 27
Answer: A
Question. Transition metals mostly are
(a) paramagnetic
(b) diamagnetic
(c) neither diamagnetic nor paramagnetic
(d) both diamagnetic and paramagnetic
Answer: A
Question. Transition metals usually exhibit highest oxidation states in their
(a) fluorides
(b) iodides
(c) chlorides
(d) bromides
Answer: A
Question. Which of the following is incorrect?
(a) Mn shows oxidation state of +7 in MnF7
(b) Fe and Co shows +3 oxidation state in FeX3 and CoF3
(c) V shows oxidation state of + 5 in VF5.
(d) Cu does not shows +2 oxidation state with I–.
Answer: A
Question. Which of the following is not correct about transition metals
(a) They do not exhibit variable valency
(b) They can form ionic or covalent compounds
(c) Their compounds are generally coloured
(d) Their melting and boiling points are high
Answer: A
Question. Transition elements
(a) exhibit variable oxidation states
(b) do not form coloured ions
(c) show inert pair effect
(d) have low melting point
Answer: A
Question. Which one of the following ions is the most stable in aqueous solution?
(a) Cr3+
(b) Ti3+
(c) V3+
(d) Mn3+
Answer: A
Question. Which one of the following does not correctly represent the correct order of the property indicated against it?
(a) Ti < V < Cr < Mn : increasing melting points
(b) Ti < V < Mn < Cr : increasing 2nd ionization enthalpy
(c) Ti < V < Cr < Mn : increasing number of oxidation states
(d) None of these
Answer: A
Question. What is wrong about transition metals
(a) Diamagnetic
(b) Paramagnetic
(c) Form complexes
(d) Shows variable oxidation state
Answer: A
Question. Which of the following ions has the maximum magnetic moment?
(a) Mn+2
(b) Fe+2
(c) Cr+2.
(d) None of these
Answer: A
Question. Titanium shows magnetic moment of 1.73 B.M. in its compound. What is the oxidation number of Ti in the compound?
(a) +3
(b) +1
(c) +4
(d) +2
Answer: A
Question. Which one of the following ions has the maximum magnetic moment?
(a) Fe3+
(b) Ti3+
(c) Sc3+
(d) Cr3+
Answer: A
Question. The magnetic nature of elements depend on the presence of unpaired electrons. Identify the configuration of transition element, which shows highest magnetic moment
(a) 3d 5
(b) 3d 2
(c) 3d7
(d) None of these
Answer: A
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MCQs for The D and F Block Elements Chemistry Full Syllabus
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