MCQOPTIONS
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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.
| 4501. |
The formation of the oxide ion \[O_{(g)}^{2-}\] requires first an exothermic and then an endothermic step as shown below \[{{O}_{(g)}}+{{e}^{-}}=O_{(g)}^{-}\Delta {{H}^{0}}=-142\ kJmo{{l}^{-1}}\] \[O_{(g)}^{-}+{{e}^{-}}=O_{(g)}^{2-}\Delta {{H}^{0}}=844\ kJmo{{l}^{-1}}\] This is because [AIEEE 2004] |
| A. | \[{{O}^{-}}\] ion will tend to resist the addition of another electron |
| B. | Oxygen has high electron affinity |
| C. | Oxygen is more electronegative |
| D. | \[{{O}^{-}}\]ion has comparatively larger size than oxygen atom |
| Answer» B. Oxygen has high electron affinity | |
| 4502. |
Mg and Li are similar in their properties due to [AFMC 2004] |
| A. | Same e/m ratio |
| B. | Same electron affinity |
| C. | Same group |
| D. | Same ionic potential |
| Answer» E. | |
| 4503. |
If the IP of \[Na\] is 5.48 eV, the ionisation potential of \[K\] will be [EAMCET 1988] |
| A. | Same as that of \[Na\] |
| B. | 5.68 eV |
| C. | 4.34 eV |
| D. | 10.88 eV |
| Answer» D. 10.88 eV | |
| 4504. |
The ionization energy of nitrogen is larger than that of oxygen because of [RPMT 1997; DCE 1999] |
| A. | Greater attraction of electrons by the nucleus |
| B. | The size of nitrogen atom being smaller |
| C. | The half-filled \[p\]-orbitals possess extra stability |
| D. | Greater penetration effect |
| Answer» D. Greater penetration effect | |
| 4505. |
Order of first ionization potentials of elements Li, Be, B, Na is [Kerala CET 2005] |
| A. | Li > Be >B > Na |
| B. | Be >B > Li > Na |
| C. | Na > Li > B > Be |
| D. | Be > Li > B > Na |
| E. | B > Be > Li > Na |
| Answer» C. Na > Li > B > Be | |
| 4506. |
Which one of the following elements has the highest ionisation energy |
| A. | Na |
| B. | Mg |
| C. | C |
| D. | F |
| Answer» E. | |
| 4507. |
Which has maximum first ionization potential [IIT 1982; EAMCET 1997; KCET (Med.) 1999; KCET 2000] |
| A. | C |
| B. | N |
| C. | B |
| D. | O |
| Answer» C. B | |
| 4508. |
A neutral atom will have the lowest ionization potential when its electronic configuration is [NCERT 1978; CBSE PMT 1991] |
| A. | \[1{{s}^{1}}\] |
| B. | \[1{{s}^{2}},\,2{{s}^{2}}{{p}^{6}}\] |
| C. | \[1{{s}^{2}},\,2{{s}^{2}}{{p}^{2}}\] |
| D. | \[1{{s}^{2}},\,2{{s}^{2}}{{p}^{6}},\,3{{s}^{1}}\] |
| Answer» E. | |
| 4509. |
Ionization energy increases in the order |
| A. | \[Be,\,B,\,C,\,N\] |
| B. | \[B,\,Be,\,C,\,N\] |
| C. | \[C,\,N,\,Be,\,B\] |
| D. | \[N,\,C,\,Be,\,B\] |
| Answer» C. \[C,\,N,\,Be,\,B\] | |
| 4510. |
In a period from \[Li\] to \[F\], ionization potential [CPMT 1982] |
| A. | Increases |
| B. | Decreases |
| C. | Remains same |
| D. | None of the above |
| Answer» B. Decreases | |
| 4511. |
The process requiring the absorption of energy is [Roorkee 1990] |
| A. | \[F\to {{F}^{-}}\] |
| B. | \[Cl\to C{{l}^{-}}\] |
| C. | \[O\to {{O}^{2-}}\] |
| D. | \[H\to {{H}^{-}}\] |
| Answer» D. \[H\to {{H}^{-}}\] | |
| 4512. |
In the long form of periodic table, the element having lowest ionisation potentials are present in [EAMCET 1992] |
| A. | I group |
| B. | IV group |
| C. | VII group |
| D. | Zero group |
| Answer» B. IV group | |
| 4513. |
Which of the following elements will have the lowest first ionisation energy [KCET 1992] |
| A. | \[Mg\] |
| B. | \[Rb\] |
| C. | \[Li\] |
| D. | \[Ca\] |
| Answer» C. \[Li\] | |
| 4514. |
In ionisation of hydrogen, the energy required is [CPMT 1996] |
| A. | \[13.6eV\] |
| B. | \[>13.6eV\] |
| C. | \[<13.6eV\] |
| D. | \[1.5eV\] |
| Answer» B. \[>13.6eV\] | |
| 4515. |
Which has the highest second ionisation potential [AIIMS 1991] |
| A. | Nitrogen |
| B. | Carbon |
| C. | Oxygen |
| D. | Fluorine |
| Answer» D. Fluorine | |
| 4516. |
The element with highest value of ionization potential is |
| A. | Potassium |
| B. | Helium |
| C. | Hydrogen |
| D. | Xenon |
| Answer» C. Hydrogen | |
| 4517. |
First I.P. of \[Mg\] is ...... than \[Al\] [CPMT 1997] |
| A. | Less |
| B. | More |
| C. | Equal |
| D. | None of these |
| Answer» C. Equal | |
| 4518. |
Which of the following has minimum ionization energy [JIPMER 1999] |
| A. | Ge |
| B. | Se |
| C. | As |
| D. | Br |
| Answer» B. Se | |
| 4519. |
Which of the following species has lowest ionization potential [KCET 1996] |
| A. | \[O\] |
| B. | \[{{O}_{2}}\] |
| C. | \[O_{2}^{+}\] |
| D. | \[O_{2}^{-}\] |
| Answer» E. | |
| 4520. |
Which of the following transitions involves maximum amount of energy [AIIMS 1992] |
| A. | \[{{M}^{-}}(g)\to M(g)\] |
| B. | \[M(g)\to {{M}^{+}}(g)\] |
| C. | \[{{M}^{+}}(g)\to {{M}^{2+}}(g)\] |
| D. | \[{{M}^{2+}}(g)\to {{M}^{3+}}(g)\] |
| Answer» E. | |
| 4521. |
In halogens, with the increase of atomic number which habit is found |
| A. | Habit to loose electrons decreases |
| B. | Ionic radii decreases |
| C. | Ionization potential decreases |
| D. | In \[M{{X}_{2}}\,(M=\] metal and \[X=\] halogen), covalent properties decreases |
| Answer» D. In \[M{{X}_{2}}\,(M=\] metal and \[X=\] halogen), covalent properties decreases | |
| 4522. |
The order of the magnitude of first ionisation potentials of Be, B, N and O is [MP PMT 1996] |
| A. | \[N>O>Be>B\] |
| B. | \[N>Be>O>B\] |
| C. | \[Be>B>N>O\] |
| D. | \[B>Be>O>N\] |
| Answer» B. \[N>Be>O>B\] | |
| 4523. |
Ionisation energy in group I-A varies in the decreasing order as [Orissa JEE 2005] |
| A. | \[Li>Na>K>Cs\] |
| B. | \[Na>Li>K>Cs\] |
| C. | \[Li>Cs>K>Na\] |
| D. | \[K>Cs>Na>Li\] |
| Answer» B. \[Na>Li>K>Cs\] | |
| 4524. |
In view of their low ionisation energies the alkali metals are [MP PMT 2002] |
| A. | Weak oxidising agents |
| B. | Strong reducing agents |
| C. | Strong oxidising agents |
| D. | Weak reducing agents |
| Answer» C. Strong oxidising agents | |
| 4525. |
The ionisation potential of hydrogen from ground state to the first excited state is [DCE 2001] |
| A. | \[-13.6\,\,eV\] |
| B. | \[13.6\,\,eV\] |
| C. | \[-3.4\,eV\] |
| D. | \[3.4\,\,eV\] |
| Answer» D. \[3.4\,\,eV\] | |
| 4526. |
Correct increasing order of first ionistion potential is [UPSEAT 2003] |
| A. | \[Na<Mg>Al<Si\] |
| B. | \[Na<Mg<Al<Si\] |
| C. | \[Na>Mg>Al>Si\] |
| D. | \[Na<Mg<Al>Si\] |
| Answer» B. \[Na<Mg<Al<Si\] | |
| 4527. |
Correct order of polarising power is [MP PMT 2003; BHU 2003] |
| A. | \[C{{s}^{+}}<{{K}^{+}}<M{{g}^{2+}}<A{{l}^{3+}}\] |
| B. | \[{{K}^{+}}<C{{s}^{+}}<M{{g}^{2+}}<A{{l}^{3+}}\] |
| C. | \[C{{s}^{+}}<{{K}^{+}}<A{{l}^{3+}}<M{{g}^{2+}}\] |
| D. | \[{{K}^{+}}<C{{s}^{+}}<A{{l}^{3+}}<M{{g}^{2+}}\] |
| Answer» B. \[{{K}^{+}}<C{{s}^{+}}<M{{g}^{2+}}<A{{l}^{3+}}\] | |
| 4528. |
The correct sequence of elements in decreasing order of first ionisation energy is [MP PET 1997] |
| A. | \[Na>Mg>Al\] |
| B. | \[Mg>Na>Al\] |
| C. | \[Al>Mg>Na\] |
| D. | \[Mg>Al>Na\] |
| Answer» E. | |
| 4529. |
Which of the following electrons should have the highest value of ionisation energy (for the same value of the principal quantum number) |
| A. | s |
| B. | p |
| C. | d |
| D. | f |
| Answer» B. p | |
| 4530. |
Highest ionisation energy stands for [DPMT 2000] |
| A. | He |
| B. | C |
| C. | N |
| D. | H |
| Answer» B. C | |
| 4531. |
Spectrum of \[L{{i}^{2+}}\] is similar to that of [AIIMS 2002] |
| A. | H |
| B. | He |
| C. | Be |
| D. | Ne |
| Answer» B. He | |
| 4532. |
The first ionisation energy of lithium will be [EAMCET 1990] |
| A. | Greater than \[Be\] |
| B. | Less than \[Be\] |
| C. | Equal to that of \[Na\] |
| D. | Equal to that of \[F\] |
| Answer» C. Equal to that of \[Na\] | |
| 4533. |
Which of the following has the least ionization potential [MP PET 2002] |
| A. | Lithium (Li) |
| B. | Helium (He) |
| C. | Nitrogen (N) |
| D. | Zinc (Zn) |
| Answer» B. Helium (He) | |
| 4534. |
Which of the following order is wrong [CBSE 2002] |
| A. | \[N{{H}_{3}}<P{{H}_{3}}<As{{H}_{3}}\]-acidic nature |
| B. | \[L{{i}^{+}}<N{{a}^{+}}<{{K}^{+}}<C{{s}^{+}}\]-ionic radius |
| C. | \[A{{l}_{2}}{{O}_{3}}<MgO<N{{a}_{2}}O<{{K}_{2}}O\]-basic |
| D. | \[Li<Be<B<C\]-1st ionisation potential |
| Answer» E. | |
| 4535. |
Which is the correct order of the first ionization potential of N, O and C [AMU 2000] |
| A. | \[C>N>O\] |
| B. | \[C<N>O\] |
| C. | \[O>N>O\] |
| D. | \[C>N\]~\[O\] |
| Answer» C. \[O>N>O\] | |
| 4536. |
The decreasing order of the ionisation potential in the following elements is [MP PMT 2001] |
| A. | \[Ne>Cl>P>S>Al>Mg\] |
| B. | \[Ne>Cl>P>S>Mg>Al\] |
| C. | \[Ne>Cl>S>P>Mg>Al\] |
| D. | \[Ne>Cl>S>P>Al>Mg\] |
| Answer» C. \[Ne>Cl>S>P>Mg>Al\] | |
| 4537. |
Among the following options, the sequence of increasing first ionisation potential will be [AIIMS 2000; MP PMT 2002] |
| A. | \[B<C<N\] |
| B. | \[B>C>N\] |
| C. | \[C<B<N\] |
| D. | \[N>C>B\] |
| Answer» B. \[B>C>N\] | |
| 4538. |
The set representing the correct order of first ionisation potential is [IIT-JEE (Screening) 2001] |
| A. | \[K>Na>Li\] |
| B. | \[Be>Mg>Ca\] |
| C. | \[B>C>N\] |
| D. | \[Ge>Si>C\] |
| Answer» C. \[B>C>N\] | |
| 4539. |
Which among the following species has the highest ionisation potential [KCET 2001] |
| A. | B |
| B. | Li |
| C. | Ne |
| D. | F |
| Answer» D. F | |
| 4540. |
The statement that is not correct for the periodic classification of elements is [IIT-JEE 1992] |
| A. | The properties of elements are the periodic functions of their atomic numbers |
| B. | Non-metallic elements are lesser in number than metallic elements |
| C. | The first ionisation energies along a period do not vary in a regular manner with increase in atomic number |
| D. | For transition elements the \[d\]-sub-shells are filled with electrons monotonically with increase in atomic number |
| Answer» D. For transition elements the \[d\]-sub-shells are filled with electrons monotonically with increase in atomic number | |
| 4541. |
With reference to concept of ionisation potential, which one of the following sets are correct [Kurukshetra CEE 1991] |
| A. | \[U>K>Cs\] |
| B. | \[B>U>K\] |
| C. | \[Cs>U>B\] |
| D. | \[Cs<U<K\] |
| Answer» B. \[B>U>K\] | |
| 4542. |
Arrange S, P, As in order of increasing ionisation energy [JIPMER (Med.) 2002] |
| A. | \[S<P<As\] |
| B. | \[P<S<As\] |
| C. | \[As<S<P\] |
| D. | \[As<P<S\] |
| Answer» D. \[As<P<S\] | |
| 4543. |
The first ionisation potential will be maximum for [CPMT 2000] |
| A. | Lithium |
| B. | Hydrogen |
| C. | Uranium |
| D. | Iron |
| Answer» C. Uranium | |
| 4544. |
Among the following which has the highest first ionization energy |
| A. | \[K\] |
| B. | \[Na\] |
| C. | \[B\] |
| D. | \[Kr\] |
| Answer» E. | |
| 4545. |
When the first ionization energies are plotted against atomic number the peaks are occupied [CET Pune 1998] |
| A. | Alkali metals |
| B. | Halogens |
| C. | Rare gases |
| D. | Transition elements |
| Answer» D. Transition elements | |
| 4546. |
The second ionization potential is [Bihar CEE 1995; CET Pune 1998] |
| A. | Less than the first ionization potential |
| B. | Equal to the first ionization potential |
| C. | Greater than the first ionization potential |
| D. | None of these |
| Answer» D. None of these | |
| 4547. |
Which of the following has highest first ionization energy [MP PET 1994] |
| A. | Sulphur |
| B. | Oxygen |
| C. | Nitrogen |
| D. | Phosphorus |
| Answer» D. Phosphorus | |
| 4548. |
The screening effect of inner electrons of the nucleus causes [MP PMT 1994] |
| A. | A decrease in the ionisation potential |
| B. | An increase in the ionisation potential |
| C. | No effect on the ionisation potential |
| D. | An increase in the attraction of the nucleus to the electrons |
| Answer» B. An increase in the ionisation potential | |
| 4549. |
If first orbit energy of \[H{{e}^{+}}\] is - 54.4 eV, then the second orbit energy will be [Roorkee 1995] |
| A. | - 54.4 eV |
| B. | - 13.6 eV |
| C. | - 27.2 eV |
| D. | + 27.2 eV |
| Answer» C. - 27.2 eV | |
| 4550. |
Which of the following has lowest first ionisation potential [CPMT 1993] |
| A. | B |
| B. | C |
| C. | N |
| D. | O |
| Answer» B. C | |