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.
| 4551. |
The first ionisation energies of alkaline earth metals are higher than those of the alkali metals. This is because [MP PET 1996] |
| A. | There is increase in the nuclear charge of the alkaline earth metals |
| B. | There is a decrease in the nuclear charge of the alkaline earth metals |
| C. | There is no change in the nuclear charge |
| D. | None of the above |
| Answer» B. There is a decrease in the nuclear charge of the alkaline earth metals | |
| 4552. |
Which of the following elements has the lowest ionistion potential [EAMCET 1993] |
| A. | N |
| B. | O |
| C. | F |
| D. | Ne |
| Answer» C. F | |
| 4553. |
Which one of the following elements has the highest ionisation energy [IIT-JEE 1990] |
| A. | \[[Ne]\,3{{s}^{2}}\,3{{p}^{1}}\] |
| B. | \[[Ne]\,3{{s}^{2}}\,3{{p}^{2}}\] |
| C. | \[[Ne]\,3{{s}^{2}}\,3{{p}^{3}}\] |
| D. | \[[Ar]\,3{{d}^{10}}\,4{{s}^{2}}\,4{{p}^{2}}\] |
| Answer» D. \[[Ar]\,3{{d}^{10}}\,4{{s}^{2}}\,4{{p}^{2}}\] | |
| 4554. |
Ionization energy is highest for [AFMC 2001; BVP 2003] |
| A. | Noble gases |
| B. | Platinum metals |
| C. | Transition elements |
| D. | Inner-transition elements |
| Answer» B. Platinum metals | |
| 4555. |
The first four ionization energy values of an element are 191, 578, 872 and 5962 kcal. The number of valence electrons in the element is |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 4556. |
Which of the following has maximum ionization potential [MH CET 1999] |
| A. | K |
| B. | Na |
| C. | Al |
| D. | Mg |
| Answer» E. | |
| 4557. |
Which ionisation potential \[\left( IP \right)\] in the following equations involves the greatest amount of energy [Pune CET 1998] |
| A. | \[Na\to N{{a}^{+}}+{{e}^{-}}\] |
| B. | \[{{K}^{+}}\to {{K}^{2+}}+{{e}^{-}}\] |
| C. | \[{{C}^{2+}}\to {{C}^{3+}}+{{e}^{-}}\] |
| D. | \[C{{a}^{+}}\to C{{a}^{2+}}+{{e}^{-}}\] |
| Answer» C. \[{{C}^{2+}}\to {{C}^{3+}}+{{e}^{-}}\] | |
| 4558. |
The first ionization potentials \[\left( eV \right)\] of \[Be\] and \[B\] respectively are [CBSE PMT 1998] |
| A. | \[8.29eV\], \[9.32eV\] |
| B. | \[9.32eV\], \[9.32eV\] |
| C. | \[8.29eV\], \[8.29eV\] |
| D. | \[9.32eV\], \[8.29eV\] |
| Answer» E. | |
| 4559. |
The ionization energy of an element is |
| A. | The same as the electron affinity of the element |
| B. | Equal in magnitude but of opposite sign to the electron affinity of the element |
| C. | The energy released when an electron is added to an atom of the element |
| D. | The energy required to remove the outermost electron of an atom of the element |
| Answer» E. | |
| 4560. |
Hydrogen has high ionization energy than alkali metals, due to its [AIIMS 1999] |
| A. | Large size |
| B. | Small size |
| C. | Ionic bond |
| D. | Covalent bond |
| Answer» C. Ionic bond | |
| 4561. |
Which of the following gaseous atoms has highest value of \[IE\] [JIPMER 1997; CPMT 1997; AIIMS 2000] |
| A. | \[P\] |
| B. | \[Si\] |
| C. | \[Mg\] |
| D. | \[Al\] |
| Answer» B. \[Si\] | |
| 4562. |
How many ionisation energies can carbon have |
| A. | 1 |
| B. | 2 |
| C. | 4 |
| D. | 6 |
| Answer» D. 6 | |
| 4563. |
The first ionization potential of Na, Mg, Al and Si are in the order [IIT 1988; MP PMT 2000] |
| 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 | |
| 4564. |
In which of the following process highest energy is absorbed [RPET 2000] |
| A. | \[Cu\to C{{u}^{+}}\] |
| B. | \[Br\to B{{r}^{-}}\] |
| C. | \[I\to {{I}^{-}}\] |
| D. | \[Li\to L{{i}^{+}}\] |
| Answer» B. \[Br\to B{{r}^{-}}\] | |
| 4565. |
Highest energy will be absorbed to eject out the electron in the configuration [RPMT 2000] |
| A. | \[1{{s}^{2}}2{{s}^{2}}2{{p}^{1}}\] |
| B. | \[1{{s}^{2}}2{{s}^{2}}2{{p}^{3}}\] |
| C. | \[1{{s}^{2}}2{{s}^{2}}2{{p}^{2}}\] |
| D. | \[1{{s}^{2}}2{{s}^{2}}2{{p}^{4}}\] |
| Answer» C. \[1{{s}^{2}}2{{s}^{2}}2{{p}^{2}}\] | |
| 4566. |
Which of the following element has maximum, first ionisation potential [AIIMS 2001] |
| A. | V |
| B. | Ti |
| C. | Cr |
| D. | Mn |
| Answer» E. | |
| 4567. |
\[A\to {{A}^{+}}+e,\,\,{{E}_{1}}\] and \[{{A}^{+}}\to {{A}^{2+}}+e,\,\,{{E}_{2}}\]. The energy required to pull out the two electrons are \[{{E}_{1}}\] and \[{{E}_{2}}\] respectively. The correct relationship between two energy would be |
| A. | \[{{E}_{1}}<\,{{E}_{2}}\] |
| B. | \[{{E}_{1}}={{E}_{2}}\] |
| C. | \[{{E}_{1}}>{{E}_{2}}\] |
| D. | \[{{E}_{1}}\ne {{E}_{2}}\] |
| Answer» B. \[{{E}_{1}}={{E}_{2}}\] | |
| 4568. |
The first ionization energy of boron is less than that of beryllium because |
| A. | Boron has higher nuclear charge |
| B. | Atomic size of boron is more than that of beryllium |
| C. | Boron has only one electron in p-sub-shell |
| D. | Atomic size of boron is less than that of beryllium |
| Answer» D. Atomic size of boron is less than that of beryllium | |
| 4569. |
The ionization energy of nitrogen is more than that of oxygen because [MP PET 1993] |
| A. | Nitrogen has half filled p-orbitals |
| B. | Nitrogen is left to the oxygen in the same period of the periodic table |
| C. | Nitrogen contains less number of electrons |
| D. | Nitrogen is less electronegative |
| Answer» B. Nitrogen is left to the oxygen in the same period of the periodic table | |
| 4570. |
The energy required to remove an electron of a gaseous atom from its ground state is called [CPMT 1989, 94] |
| A. | Potential energy |
| B. | Ionization energy |
| C. | Electrode potential |
| D. | Activation energy |
| Answer» C. Electrode potential | |
| 4571. |
Which of the following explanation is best for not placing hydrogen in either the group of alkali metals or halogens [NCERT 1978] |
| A. | The ionization energy of hydrogen is to high for group of alkali metals, but too low of halogen group |
| B. | Hydrogen can form compounds with all other elements |
| C. | Hydrogen is much lighter element than the alkali metals or the halogens |
| D. | None of the above |
| Answer» B. Hydrogen can form compounds with all other elements | |
| 4572. |
The second ionisation potential of an element \[M\] is the energy required to [JIPMER 1997] |
| A. | Remove one mole of electron from one mole of gaseous anion |
| B. | Remove one mole of electron from one mole of gaseous cation of the element |
| C. | Remove one mole of electron from one mole of monovalent gaseous cation of the element |
| D. | Remove 2 moles of electrons from one mole of gaseous atoms |
| Answer» D. Remove 2 moles of electrons from one mole of gaseous atoms | |
| 4573. |
The incorrect statement among the following is [IIT-JEE 1997] |
| A. | The first ionisation potential of \[Al\] is less than the first ionisation potential of \[Mg\] |
| B. | The second ionisation potential of \[Mg\] is greater than the second ionisation potential of \[Na\] |
| C. | The first ionisation potential of \[Na\] is less than the first ionisation potential of \[Mg\] |
| D. | The third ionisation potential of \[Mg\] is greater than the third ionisation potential of \[Al\] |
| Answer» C. The first ionisation potential of \[Na\] is less than the first ionisation potential of \[Mg\] | |
| 4574. |
\[C{{H}_{3}}-\overset{\overset{OH}{\mathop{|\,\,\,}}\,}{\mathop{\underset{\underset{H}{\mathop{|}}\,}{\mathop{C}}\,-}}\,CN\] is |
| A. | Acetaldehyde cyanohydrin |
| B. | Acetone cyanohydrin |
| C. | Cyanoethanol |
| D. | Ethanol nitrile |
| Answer» B. Acetone cyanohydrin | |
| 4575. |
Which of the following compounds does not contain an \[-OH\] group [CPMT 1982] |
| A. | Phenol |
| B. | Carboxylic acid |
| C. | Aldehydes |
| D. | Alcohols |
| Answer» D. Alcohols | |
| 4576. |
IUPAC name of \[C{{H}_{3}}COC{{H}_{3}}\] is [MP PET 1991] |
| A. | Acetone |
| B. | 2-propanone |
| C. | Dimethyl ketone |
| D. | Propanal |
| Answer» C. Dimethyl ketone | |
| 4577. |
Aldehydes are isomeric with |
| A. | Ketones |
| B. | Ethers |
| C. | Alcohols |
| D. | Fatty acids |
| Answer» B. Ethers | |
| 4578. |
Glyoxal is [BVP 2003] |
| A. | \[C{{H}_{2}}O-C{{H}_{2}}O\] |
| B. | \[\underset{\underset{C{{H}_{2}}OH}{\mathop{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}}\,}{\mathop{C{{H}_{2}}OH}}\,\] |
| C. | \[\underset{\underset{CHO}{\mathop{|\,\,\,\,\,\,\,\,}}\,}{\mathop{CHO}}\,\] |
| D. | \[\underset{\underset{CHO\,\,\,\,\,}{\mathop{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}}\,}{\mathop{C{{H}_{2}}OH}}\,\] |
| Answer» D. \[\underset{\underset{CHO\,\,\,\,\,}{\mathop{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}}\,}{\mathop{C{{H}_{2}}OH}}\,\] | |
| 4579. |
The IUPAC name of the following structure is \[\overset{\overset{C{{H}_{3}}\,\,\,O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}}\,}{\mathop{C{{H}_{3}}-CH-C-C{{H}_{2}}-C{{H}_{2}}OH}}\,\] [MP PMT 1995] |
| A. | 1-hydroxy 4-methyl 3-pentanone |
| B. | 2-methyl 5-hydroxy 3-pentanone |
| C. | 4-methyl 3-oxo 1-pentanol |
| D. | Hexanol-1, one-3 |
| Answer» B. 2-methyl 5-hydroxy 3-pentanone | |
| 4580. |
Which of the aldehyde is most reactive? [DCE 2004] |
| A. | \[{{C}_{6}}{{H}_{5}}-CHO\] |
| B. | \[C{{H}_{3}}CHO\] |
| C. | \[HCHO\] |
| D. | All the equally reactive |
| Answer» D. All the equally reactive | |
| 4581. |
In aldehydes and ketones, carbon of carbonyl group is [MP PMT 1995; RPET 1999, 2000] |
| A. | \[s{{p}^{3}}\] hybridised |
| B. | \[s{{p}^{2}}\] hybridized |
| C. | sp hybridised |
| D. | Unhybridised |
| Answer» C. sp hybridised | |
| 4582. |
Acetone and acetaldehyde are [KCET 1998] |
| A. | Position isomers |
| B. | Functional isomers |
| C. | Not isomers |
| D. | Chain isomers |
| Answer» D. Chain isomers | |
| 4583. |
Which of the following is a mixed ketone [AFMC 1997] |
| A. | Pentanone |
| B. | Acetophenone |
| C. | Benzophenone |
| D. | Butanone |
| Answer» C. Benzophenone | |
| 4584. |
Chloral is [CPMT 1976, 84] |
| A. | \[CC{{l}_{3}}CHO\] |
| B. | \[CC{{l}_{3}}COC{{H}_{3}}\] |
| C. | \[CC{{l}_{3}}COCC{{l}_{3}}\] |
| D. | \[CC{{l}_{3}}C{{H}_{2}}OH\] |
| Answer» B. \[CC{{l}_{3}}COC{{H}_{3}}\] | |
| 4585. |
Which of the following types of isomerism is shown by pentanone [MP PMT 1995] |
| A. | Chain isomerism |
| B. | Position isomerism |
| C. | Functional isomerism |
| D. | All of these |
| Answer» E. | |
| 4586. |
IUPAC name of \[CC{{l}_{3}}CHO\] is [MP PMT/PET 1988] |
| A. | Chloral |
| B. | Trichloro acetaldehyde |
| C. | 1, 1, 1-trichloroethanal |
| D. | 2, 2, 2-trichloroethanal |
| Answer» E. | |
| 4587. |
In the group \[\begin{matrix} {{R}'} \\ R \\ \end{matrix}>C=O\] the carbonyl carbon is joined to other atoms by |
| A. | Two sigma and one pi bonds |
| B. | Three sigma and one pi bonds |
| C. | One sigma and two pi bonds |
| D. | Two sigma and two pi bonds |
| Answer» C. One sigma and two pi bonds | |
| 4588. |
Ethanedial has which functional group(s) |
| A. | One ketonic |
| B. | Two aldehydic |
| C. | One double bond |
| D. | Two double bond |
| Answer» C. One double bond | |
| 4589. |
Reaction of acetaldehyde with HCN followed by hydrolysis gives a compound which shows [MP PET 1997] |
| A. | Optical isomerism |
| B. | Geometrical isomerism |
| C. | Metamerism |
| D. | Tautomerism |
| Answer» B. Geometrical isomerism | |
| 4590. |
Triaminobenzene is a [BHU 1996] |
| A. | \[{{2}^{o}}\] amine |
| B. | \[{{3}^{o}}\] amine |
| C. | \[{{1}^{o}}\] amine |
| D. | Quarternary salt |
| Answer» D. Quarternary salt | |
| 4591. |
Allyl isocyanide has [IIT 1995] |
| A. | 9 sigma bonds and 4 pi bonds |
| B. | 8 sigma bonds and 5 pi bonds |
| C. | 8 sigma bonds, 3 pi bonds and 4 non-bonding electrons |
| D. | 9 sigma bonds, 3 pi bonds and 2 non-bonding electrons |
| Answer» E. | |
| 4592. |
The structural formula of methyl aminomethane is [MP PMT 1991] |
| A. | \[{{(C{{H}_{3}})}_{2}}CHN{{H}_{2}}\] |
| B. | \[{{(C{{H}_{3}})}_{3}}N\] |
| C. | \[{{(C{{H}_{3}})}_{2}}NH\] |
| D. | \[C{{H}_{3}}N{{H}_{2}}\] |
| Answer» D. \[C{{H}_{3}}N{{H}_{2}}\] | |
| 4593. |
A secondary amine is [KCET 1992] |
| A. | An organic compound with two \[-N{{H}_{2}}\] groups |
| B. | A compound with two carbon atoms and an \[-N{{H}_{2}}\] group |
| C. | A compound with an \[-N{{H}_{2}}\] group on the carbon atom in number 2 position |
| D. | A compound in which two of the hydrogens of \[N{{H}_{3}}\] have been replaced by organic groups |
| Answer» E. | |
| 4594. |
\[{{(C{{H}_{3}})}_{2}}\underset{N{{H}_{2}}\,\,\,\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{C.C{{H}_{2}}.}}\,}}\,CO.C{{H}_{3}}\] is [MP PET/PMT 1988] |
| A. | Diacetone |
| B. | Acetoneamine |
| C. | Diacetoneamine |
| D. | Aminoacetone |
| Answer» D. Aminoacetone | |
| 4595. |
\[{{C}_{3}}{{H}_{9}}N\] represents [AMU 1988] |
| A. | Primary amine |
| B. | Secondary amine |
| C. | Tertiary amine |
| D. | All of these |
| Answer» E. | |
| 4596. |
Which of the following is \[{{1}^{o}}\] amine |
| A. | Ethylene diamine |
| B. | Dimethyl amine |
| C. | Trimethyl amine |
| D. | N-methyl aniline |
| Answer» B. Dimethyl amine | |
| 4597. |
Compounds containing both amino and COOH groups are known as |
| A. | Diamines |
| B. | Unknown |
| C. | Amino acids |
| D. | Enzymes |
| Answer» D. Enzymes | |
| 4598. |
Number of isomeric primary amines obtained from \[{{C}_{4}}{{H}_{11}}N\] are [DPMT 2005] |
| A. | 3 |
| B. | 4 |
| C. | 5 |
| D. | 6 |
| Answer» C. 5 | |
| 4599. |
In alkyl cyanide alkyl group attached with [BCECE 2005] |
| A. | C of CN group |
| B. | N of CN group |
| C. | Either C or N of CN group |
| D. | Both C and N of CN group |
| Answer» B. N of CN group | |
| 4600. |
Acetonitrile is: [MP PMT 2004] |
| A. | \[{{C}_{2}}{{H}_{5}}CN\] |
| B. | \[C{{H}_{3}}CN\] |
| C. | \[C{{H}_{3}}COCN\] |
| D. | \[{{C}_{6}}{{H}_{5}}C{{H}_{2}}CN\] |
| Answer» C. \[C{{H}_{3}}COCN\] | |