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MCQOPTIONS
This section includes 11242 Mcqs, each offering curated multiple-choice questions to sharpen your Joint Entrance Exam - Main (JEE Main) knowledge and support exam preparation. Choose a topic below to get started.
| 5751. |
Which of the following has the maximum number of unpaired d-electrons [BIT 1992; CBSE PMT 1999] |
| A. | \[Zn\] |
| B. | \[F{{e}^{2+}}\] |
| C. | \[N{{i}^{3+}}\] |
| D. | \[C{{u}^{+}}\] |
| Answer» C. \[N{{i}^{3+}}\] | |
| 5752. |
The general electronic configuration of transition elements is [CPMT 1984, 90, 2002; CBSE PMT 1991, 96; AIIMS 2001; Pb. CET 2000; MP PMT 2003] |
| A. | \[(n-1){{d}^{1-5}}\] |
| B. | \[(n-1){{d}^{1-10}}n{{s}^{1}}\] |
| C. | \[(n-1){{d}^{1-10}}n{{s}^{1-2}}\] |
| D. | \[n{{s}^{2}}(n-1){{d}^{10}}\] |
| Answer» D. \[n{{s}^{2}}(n-1){{d}^{10}}\] | |
| 5753. |
Which of the following represents the electronic configuration of a transition element [EAMCET 1987] |
| A. | \[1{{s}^{2}},2{{s}^{2}}{{p}^{6}}.......n{{s}^{2}}{{p}^{3}}\] |
| B. | \[1{{s}^{2}},2{{s}^{2}}{{p}^{6}}.......n{{s}^{2}}{{p}^{6}}{{d}^{3}},(n+1){{s}^{2}}\] |
| C. | \[1{{s}^{2}},2{{s}^{2}}{{p}^{6}}.......n{{s}^{2}}{{p}^{6}}{{d}^{10}},(n+1){{s}^{2}}{{p}^{1}}\] |
| D. | \[1{{s}^{2}},2{{s}^{2}}{{p}^{6}}.......n{{s}^{2}}{{p}^{6}}\] |
| Answer» C. \[1{{s}^{2}},2{{s}^{2}}{{p}^{6}}.......n{{s}^{2}}{{p}^{6}}{{d}^{10}},(n+1){{s}^{2}}{{p}^{1}}\] | |
| 5754. |
Which of the following statements is not true in regard to transition elements [EAMCET 1988, 89] |
| A. | They readily form complex compounds |
| B. | They show variable valency |
| C. | All their ions are colourless |
| D. | Their ions contain partially filled d -electron levels |
| Answer» D. Their ions contain partially filled d -electron levels | |
| 5755. |
Which of the following transition metal is present in misch metal |
| A. | \[La\] |
| B. | \[Sc\] |
| C. | \[Ni\] |
| D. | \[Cr\] |
| Answer» B. \[Sc\] | |
| 5756. |
Which ion has maximum magnetic moment [AIIMS 1983; MP PMT 1990] |
| A. | \[{{V}^{+3}}\] |
| B. | \[M{{n}^{+3}}\] |
| C. | \[F{{e}^{+3}}\] |
| D. | \[C{{u}^{+2}}\] |
| Answer» D. \[C{{u}^{+2}}\] | |
| 5757. |
Which belongs to the actinides series [J & K 2005] |
| A. | \[Ce\] |
| B. | \[Cf\] |
| C. | \[Ca\] |
| D. | \[Cs\] |
| Answer» C. \[Ca\] | |
| 5758. |
Effective magnetic droment of \[S{{c}^{+3}}\]ion is [Kerala CET 2005] |
| A. | 1.73 |
| B. | 0 |
| C. | 5.92 |
| D. | 2.83 |
| E. | 3.87 |
| Answer» C. 5.92 | |
| 5759. |
Those elements whose two outermost orbitals are incompletely filled with electrons are |
| A. | p - block elements |
| B. | s - block elements |
| C. | Transitional elements |
| D. | Both s and p - block elements |
| Answer» D. Both s and p - block elements | |
| 5760. |
Transition metals show paramagnetism [BHU 2005] |
| A. | Due to characteristic configuration |
| B. | High lattice energy |
| C. | Due to variable oxidation states |
| D. | Due to unpaired electrons |
| Answer» E. | |
| 5761. |
Which of the following pairs of elements cannot form an alloy [KCET 2005] |
| A. | \[Zn,\,Cu\] |
| B. | \[Fe,\,Hg\] |
| C. | \[Fe,\,C\] |
| D. | \[Hg,\,Na\] |
| Answer» C. \[Fe,\,C\] | |
| 5762. |
Which of the following have maximum number of unpaired electrons [BHU 2005] |
| A. | Fe3+ |
| B. | Fe2+ |
| C. | Co2+ |
| D. | Co3+ |
| Answer» B. Fe2+ | |
| 5763. |
Which of the following factors may be regarded as the main cause of lanthanide contraction [AIEEE 2005] |
| A. | Poor shielding of one of \[4f\] electron by another in the subshell |
| B. | Effective shielding of one of \[4f\] electrons by another in the subshell |
| C. | Poorer shielding of \[5d\] electrons by \[4f\] electrons |
| D. | Greater shielding of \[5d\] electron by \[4f\] electrons |
| Answer» B. Effective shielding of one of \[4f\] electrons by another in the subshell | |
| 5764. |
The lanthanide contraction is responsible for the fact that [AIEEE 2005] |
| A. | \[Zr\] and \[Y\] have about the same radius |
| B. | \[Zr\] and \[Nb\] have similar oxidation state |
| C. | \[Zr\] and \[Hf\] have about the same radius |
| D. | \[Zr\] and \[Zn\] have the same oxidation sate |
| Answer» D. \[Zr\] and \[Zn\] have the same oxidation sate | |
| 5765. |
Which of the following does not have valence electron in 3d-subshell [AIIMS 2002] |
| A. | Fe (III) |
| B. | Mn (II) |
| C. | Cr (I) |
| D. | P (0) |
| Answer» E. | |
| 5766. |
Which of the following trivalent ion has the largest atomic radii in the lanthanide series [BHU 2002] |
| A. | La |
| B. | Ce |
| C. | Pm |
| D. | Lu |
| Answer» B. Ce | |
| 5767. |
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 [CBSE PMT 2005] |
| A. | Vanadium (Z = 23) |
| B. | Chromium (Z = 24) |
| C. | Iron (Z = 26) |
| D. | Manganese (Z = 25) |
| Answer» E. | |
| 5768. |
Transitional elements are named transition elements because their characters are |
| A. | In between s and p - block elements |
| B. | Like that of p and d - block elements |
| C. | They are members of I - A group |
| D. | They are like inactive elements |
| Answer» B. Like that of p and d - block elements | |
| 5769. |
How many unpaired electrons are there in \[N{{i}^{2+}}\] [MP PET 2004] |
| A. | 2 |
| B. | 4 |
| C. | 5 |
| D. | 0 |
| Answer» B. 4 | |
| 5770. |
The main reason for larger number of oxidation states exhibited by the actinoids than the corresponding lanthanoids is [CBSE PMT 2005] |
| A. | Lesser energy difference between 5f and 6d orbitals than between 4f and 5d orbitals |
| B. | Larger atomic size of actinoids than the lanthanoids |
| C. | More energy difference between 5f and 6d orbitals than between 4f and 5d orbitals |
| D. | Greater reactive nature of the actinoids than the lanthanoids |
| Answer» B. Larger atomic size of actinoids than the lanthanoids | |
| 5771. |
Ce-58 is a member of [Pb. CET 2002] |
| A. | s-block |
| B. | p-block |
| C. | d-block |
| D. | f-block |
| Answer» E. | |
| 5772. |
Electronic configuration of \[Cu(Z=29)\] is [Pb. CET 2001] |
| A. | \[[Ar]3{{d}^{9}}4{{s}^{2}}\] |
| B. | \[[Ar]3{{d}^{10}}4{{s}^{1}}\] |
| C. | \[[Ar]3{{d}^{5}}4{{s}^{2}}\] |
| D. | \[[Ar]3{{d}^{6}}4{{s}^{2}}\] |
| Answer» C. \[[Ar]3{{d}^{5}}4{{s}^{2}}\] | |
| 5773. |
Which of the following is paramagnetic [Pb. CET 2000] |
| A. | \[N{{i}^{++}}\] |
| B. | \[C{{u}^{+}}\] |
| C. | \[Z{{n}^{++}}\] |
| D. | \[S{{c}^{+++}}\] |
| Answer» B. \[C{{u}^{+}}\] | |
| 5774. |
The electronic configuration of chromium is [BHU 2005; Pb. CET 2000] |
| A. | \[[Ne]3{{s}^{2}}3{{p}^{6}}3{{d}^{4}},4{{s}^{2}}\] |
| B. | \[[Ne]3{{s}^{2}}3{{p}^{6}}3{{d}^{5}},4{{s}^{1}}\] |
| C. | \[[Ne]3{{s}^{2}}3{{p}^{6}}3{{d}^{6}},4{{s}^{1}}\] |
| D. | \[[Ne]3{{s}^{2}}3{{p}^{5}}3{{d}^{5}},4{{s}^{2}}\] |
| Answer» C. \[[Ne]3{{s}^{2}}3{{p}^{6}}3{{d}^{6}},4{{s}^{1}}\] | |
| 5775. |
Which of the following pairs involves isoelectronic ions [UPSEAT 2004] |
| A. | \[M{{n}^{3+}}\]and \[F{{e}^{2+}}\] |
| B. | \[M{{n}^{2+}}\] and \[F{{e}^{3+}}\] |
| C. | \[C{{r}^{3+}}\] and \[F{{e}^{2+}}\] |
| D. | \[F{{e}^{2+}}\] and \[C{{o}^{2+}}\] |
| Answer» C. \[C{{r}^{3+}}\] and \[F{{e}^{2+}}\] | |
| 5776. |
What is the name of element with atomic number 105 [CPMT 2004] |
| A. | Kurchatovium |
| B. | Dubnium |
| C. | Nobelium |
| D. | Holmium |
| Answer» C. Nobelium | |
| 5777. |
Electrons in a paramagnetic compound are [UPSEAT 2004] |
| A. | Shared |
| B. | Unpaired |
| C. | Donated |
| D. | Paired |
| Answer» C. Donated | |
| 5778. |
Identify the transition element [MH CET 2003] |
| A. | \[1{{s}^{2}},\ 2{{s}^{2}}2{{p}^{6}},\ 3{{s}^{2}},\ 3{{p}^{6}},\ 4{{s}^{2}}\] |
| B. | \[1{{s}^{2}},\ 2{{s}^{2}}2{{p}^{6}},\ 3{{s}^{2}},\ 3{{p}^{6}}3{{d}^{2}},\ 4{{s}^{2}}\] |
| C. | \[1{{s}^{2}},\ 2{{s}^{2}}2{{p}^{6}},\ 3{{s}^{2}},\ 3{{p}^{6}}3{{d}^{10}},\ 4{{s}^{2}}4{{p}^{2}}\] |
| D. | \[1{{s}^{2}},\ 2{{s}^{2}}2{{p}^{6}},\ 3{{s}^{2}},\ 3{{p}^{6}}3{{d}^{10}},\ 4{{s}^{2}}4{{p}^{1}}\] |
| Answer» C. \[1{{s}^{2}},\ 2{{s}^{2}}2{{p}^{6}},\ 3{{s}^{2}},\ 3{{p}^{6}}3{{d}^{10}},\ 4{{s}^{2}}4{{p}^{2}}\] | |
| 5779. |
What is the general electronic configuration for 2nd row transition series [Orrisa JEE 2002] |
| A. | \[[Ne]3{{d}^{1-10}},4{{s}^{2}}\] |
| B. | \[[Ar]3{{d}^{1-10}},4{{s}^{1-2}}\] |
| C. | \[[Kr]4{{d}^{1-10}},\,\,5{{s}^{1-2}}\] |
| D. | \[[Xe]5{{d}^{1-10}},\,\,5{{s}^{1-2}}\] |
| Answer» D. \[[Xe]5{{d}^{1-10}},\,\,5{{s}^{1-2}}\] | |
| 5780. |
A metal M having electronic configuration \[M\]-\[1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{s}^{2}}3{{p}^{6}}3{{p}^{6}}3{{d}^{10}}4{{s}^{1}}\] [DCE 2002] |
| A. | s-block element |
| B. | d-block element |
| C. | p-block element |
| D. | None of these |
| Answer» C. p-block element | |
| 5781. |
Which of the following element has maximum first ionisation potential [Pb. CET 2002] |
| A. | V |
| B. | Ti |
| C. | Cr |
| D. | Mn |
| Answer» E. | |
| 5782. |
Which of the following is the correct sequence of atomic weights of given elements [Pb. CET 2002] |
| A. | \[Fe>Co>Ni\] |
| B. | \[Ni>Co>Fe\] |
| C. | \[Co>Ni>Fe\] |
| D. | \[Fe>Ni>Co\] |
| Answer» D. \[Fe>Ni>Co\] | |
| 5783. |
Which one of the following organisation's iron and steel plant was built to use charcoal as a source of power, to start with, but later switched over to hydroelectricity [AIIMS 2004] |
| A. | The Tata Iron and Steel Company |
| B. | The Indian Iron and Steel Company |
| C. | Mysore Iron and Steel Limited |
| D. | Hindustan Steel Limited |
| Answer» B. The Indian Iron and Steel Company | |
| 5784. |
Which of the following species is expected to show the highest magnetic moment? (At. Nos.: Cr=24, Mn = 25, Co = 27, Ni = 28, Cu = 29) [Kerala PMT 2004] |
| A. | \[C{{r}^{2+}}\] |
| B. | \[M{{n}^{2+}}\] |
| C. | \[C{{u}^{2+}}\] |
| D. | \[C{{o}^{2+}}\] |
| E. | \[N{{i}^{2+}}\] |
| Answer» C. \[C{{u}^{2+}}\] | |
| 5785. |
The lanthanide contraction relates to [Kerala PMT 2004] |
| A. | Atomic radii |
| B. | Atomic as well as \[{{M}^{3+}}\] radii |
| C. | Valence electrons |
| D. | Oxidation states |
| E. | Ionisation energy |
| Answer» C. Valence electrons | |
| 5786. |
Which of the following metals make the most efficient catalyst [BHU 1995] |
| A. | Transition |
| B. | Alkali |
| C. | Alkaline earth |
| D. | Coloured metals |
| Answer» B. Alkali | |
| 5787. |
Lanthanoids are [CBSE PMT 2004] |
| A. | 14 elements in the sixth period (atomic no. = 58 to 71) that are filling 4f sublevel |
| B. | 14 elements in the seventh period (atomic no. = 58 to 71) that are filling 4f sublevel |
| C. | 14 elements in the sixth period (atomic no. = 90 to 103) that are filling 4f sublevel |
| D. | 14 elements in the seventh period (atomic no. = 90 to 103) that are filling 4f sublevel |
| Answer» B. 14 elements in the seventh period (atomic no. = 58 to 71) that are filling 4f sublevel | |
| 5788. |
The catalytic activity of the transition metals and their compounds is ascribed to their [Kerala (Engg.) 2002] |
| A. | Chemical reactivity |
| B. | Magnetic behaviour |
| C. | Unfilled d-orbitals |
| D. | Ability to adopt multiple oxidation states and their complexing ability |
| Answer» E. | |
| 5789. |
Among the following series of transition metal ions, the one where all metals ions have \[3{{d}^{2}}\] electronic configuration is [CBSE PMT 2004] |
| A. | \[T{{i}^{4+}},\ {{V}^{3+}},\ C{{r}^{2+}},\ M{{n}^{3+}}\] |
| B. | \[T{{i}^{2+}},\ {{V}^{3+}},\ C{{r}^{4+}},\ M{{n}^{5+}}\] |
| C. | \[T{{i}^{3+}},\ {{V}^{2+}},\ C{{r}^{3+}},\ M{{n}^{4+}}\] |
| D. | \[T{{i}^{+}},\ {{V}^{4+}},\ C{{r}^{6+}},\ M{{n}^{7+}}\] |
| Answer» C. \[T{{i}^{3+}},\ {{V}^{2+}},\ C{{r}^{3+}},\ M{{n}^{4+}}\] | |
| 5790. |
Of the following outer electronic configurations of atoms, the highest oxidation state is achieved by which one of them [AIEEE 2004] |
| A. | \[(n-1){{d}^{3}}n{{s}^{2}}\] |
| B. | \[(n-1){{d}^{5}}n{{s}^{1}}\] |
| C. | \[(n-1){{d}^{8}}n{{s}^{2}}\] |
| D. | \[(n-1){{d}^{5}}n{{s}^{2}}\] |
| Answer» E. | |
| 5791. |
Which of the following ions has the highest magnetic moment [JIPMER 1997; AIEEE 2002] |
| A. | \[T{{i}^{3+}}\] |
| B. | \[S{{c}^{3+}}\] |
| C. | \[M{{n}^{2+}}\] |
| D. | \[Z{{n}^{2+}}\] |
| Answer» D. \[Z{{n}^{2+}}\] | |
| 5792. |
Chloride of which of the following elements will be coloured [MP PMT 1999] |
| A. | Silver |
| B. | Mercury |
| C. | Zinc |
| D. | Cobalt |
| Answer» E. | |
| 5793. |
Manganese is related to which block of periodic table [MP PMT 2003] |
| A. | s-block |
| B. | p-block |
| C. | d-block |
| D. | f -block |
| Answer» D. f -block | |
| 5794. |
The atomic radii of the elements are almost same of which series |
| A. | \[Fe-Co-Ni\] |
| B. | \[Na-K-Rb\] |
| C. | \[F-Cl-Br\] |
| D. | \[Li-Be-B\] |
| Answer» B. \[Na-K-Rb\] | |
| 5795. |
In human body if necessary, the plate, screw or wire used for surgery are made up of |
| A. | \[Ni\] |
| B. | \[Au\] |
| C. | \[Pt\] |
| D. | \[Ta\] |
| Answer» E. | |
| 5796. |
Which one of the following ions is colourless [MP PET 1999; RPET/PMT 1999] |
| A. | \[C{{u}^{+}}\] |
| B. | \[C{{o}^{2+}}\] |
| C. | \[N{{i}^{2+}}\] |
| D. | \[F{{e}^{3+}}\] |
| Answer» B. \[C{{o}^{2+}}\] | |
| 5797. |
An elements in+3 oxidation state has the electronic configuration\[(Ar)3{{d}^{3}}\]. Its atomic number is [JIPMER 2002] |
| A. | 24 |
| B. | 23 |
| C. | 22 |
| D. | 21 |
| Answer» B. 23 | |
| 5798. |
The highest oxidation state of \[Cr\] will be |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 6 |
| Answer» E. | |
| 5799. |
The electronic configuration of \[Ag\] atom is [CPMT 1984] |
| A. | \[\left[ Kr \right]3{{d}^{10}}4{{s}^{1}}\] |
| B. | \[\left[ Xe \right]4{{f}^{14}}{{d}^{10}}6{{s}^{1}}\] |
| C. | \[\left[ Kr \right]4{{d}^{10}}5{{s}^{1}}\] |
| D. | \[\left[ Kr \right]4{{d}^{9}}5{{s}^{2}}\] |
| Answer» D. \[\left[ Kr \right]4{{d}^{9}}5{{s}^{2}}\] | |
| 5800. |
The transition metals have a less tendency to form ions due to [Bihar CEE 1995] |
| A. | High ionisation energy |
| B. | Low heat of hydration of ion |
| C. | High heat of sublimation |
| D. | All of these |
| Answer» E. | |