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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.
| 9501. |
In IIIA group, Tl (thalium) shows +1 oxidation state while other members show +3 oxidation state. Why [JEE Orissa 2004] |
| A. | Presence of lone pair of electron in Tl |
| B. | Inert pair effect |
| C. | Large ionic radius of \[Tl\] ion |
| D. | None of these |
| Answer» C. Large ionic radius of \[Tl\] ion | |
| 9502. |
The colligative properties of a solution depend on [CPMT 1984; MP PMT 1993; UPSEAT 2001; Kerala PMT 2002] |
| A. | Nature of solute particles present in it |
| B. | Nature of solvent used |
| C. | Number of solute particles present in it |
| D. | Number of moles of solvent only |
| Answer» D. Number of moles of solvent only | |
| 9503. |
Cycloalkane has the formula [Kerala (Engg.) 2002] |
| A. | \[{{C}_{n}}{{H}_{2n+2}}\] |
| B. | \[{{C}_{n}}{{H}_{2n-2}}\] |
| C. | \[{{C}_{n}}{{H}_{2n}}\] |
| D. | \[{{C}_{2n}}{{H}_{2}}\] |
| Answer» D. \[{{C}_{2n}}{{H}_{2}}\] | |
| 9504. |
IUPAC name of the compound \[C{{H}_{3}}-\underset{OH}{\mathop{\underset{|\,\,\,\,\,\,}{\mathop{CH}}\,}}\,-C{{H}_{2}}-\underset{C{{H}_{3}}}{\mathop{\underset{|\,\,\,\,\,\,\,}{\mathop{CH}}\,}}\,-C{{H}_{3}}\] is..... [Orissa JEE 2002] |
| A. | 4-methyl pentene-2-ol |
| B. | 2-methyl pentanol-4 |
| C. | 4, 4-dimethyl butan-2-ol |
| D. | 4-methyl pentane-2-ol |
| Answer» E. | |
| 9505. |
The number of unpaired electrons in the \[F{{e}^{2+}}\] ion is [MP PET 1989; KCET 2000] |
| A. | 0 |
| B. | 4 |
| C. | 6 |
| D. | 3 |
| Answer» C. 6 | |
| 9506. |
Which of the following is the most stable alkene [AIIMS 1998; KCET (Med.) 2000; CPMT 2003] |
| A. | \[{{R}_{2}}C=C{{R}_{2}}\] |
| B. | \[RCH=CHR\] |
| C. | \[RC{{H}_{2}}=C{{H}_{2}}R\] |
| D. | \[C{{H}_{2}}=C{{H}_{2}}\] |
| Answer» B. \[RCH=CHR\] | |
| 9507. |
The IUPAC name of \[{{({{C}_{2}}{{H}_{5}})}_{2}}CHC{{H}_{2}}OH\] is [MP PMT 1986; AFMC 1990] |
| A. | 2-ethyl butanol-1 |
| B. | 2-methyl pentanol-1 |
| C. | 2-ethyl pentanol-1 |
| D. | 3-ethyl butanol-1 |
| Answer» B. 2-methyl pentanol-1 | |
| 9508. |
The IUPAC name of the compound having structure \[{{C}_{2}}{{H}_{5}}-\underset{C{{H}_{2}}}{\mathop{\underset{||\,\,\,\,}{\mathop{C-}}\,}}\,\underset{C{{H}_{3}}\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,}{\mathop{CH-}}\,}}\,C{{H}_{3}}\] is [AFMC 1990] |
| A. | 3-methyl-2-ethyl butene-1 |
| B. | 2-ethyl-3-methyl butene-1 |
| C. | 3-ethyl-3-methyl butene-1 |
| D. | Ethyl isopropyl ethane |
| Answer» C. 3-ethyl-3-methyl butene-1 | |
| 9509. |
Enzymes with two sites are called [AIIMS 2002] |
| A. | Apoenzyme |
| B. | Holoenzyme |
| C. | Allosteric enzyme |
| D. | Conjugate enzyme |
| Answer» D. Conjugate enzyme | |
| 9510. |
Reactions in Zeolite catalysts depend on [BHU 2000] |
| A. | Pores |
| B. | Apertures |
| C. | Size of cavities |
| D. | All of these |
| Answer» E. | |
| 9511. |
\[{{C}^{14}}\] is [KCET 2002] |
| A. | A natural radioactive isotope |
| B. | A natural non-radioactive isotope |
| C. | An artificial radioactive isotope |
| D. | An artificial non-radioactive isotope |
| Answer» B. A natural non-radioactive isotope | |
| 9512. |
\[KMn{{O}_{4}}\] reacts with ferrous ammonium sulphate according to the equation \[MnO_{4}^{-}+5F{{e}^{2+}}+8{{H}^{+}}\to M{{n}^{2+}}+5F{{e}^{3+}}+4{{H}_{2}}O\], here 10 ml of 0.1 M \[KMn{{O}_{4}}\] is equivalent to [CPMT 1999] |
| A. | 20 ml of 0.1 M \[FeS{{O}_{4}}\] |
| B. | 30 ml of 0.1 M \[FeS{{O}_{4}}\] |
| C. | 40 ml of 0.1 M \[FeS{{O}_{4}}\] |
| D. | 50 ml of 0.1 M \[FeS{{O}_{4}}\] |
| Answer» E. | |
| 9513. |
IUPAC name of \[C{{H}_{3}}CHO\] is [NCERT 1981; CBSE PMT 1990; MP PMT 1989, 96] |
| A. | Acetaldehyde |
| B. | Methyl aldehyde |
| C. | Ethanol |
| D. | Ethanal |
| Answer» E. | |
| 9514. |
The catalyst used in the contact process for manufacturing of sulphuric acid is [MP PMT 1987] |
| A. | Copper |
| B. | Iron/aluminum oxide |
| C. | Vanadium pent oxide |
| D. | Platinized asbestos |
| Answer» D. Platinized asbestos | |
| 9515. |
Hydrolysis of sucrose is called [BHU 1979, 83; Pb. PMT 1999; Pb. CET 2000] |
| A. | Esterification |
| B. | Saponification |
| C. | Inversion |
| D. | Hydration |
| Answer» D. Hydration | |
| 9516. |
Which is an acidic hydrocarbon [AMU 2000] |
| A. | \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}C{{H}_{3}}\] |
| B. | \[C{{H}_{3}}C\equiv CC{{H}_{3}}\] |
| C. | \[C{{H}_{3}}C\equiv CH\] |
| D. | \[C{{H}_{2}}=CH-CH=C{{H}_{2}}\] |
| Answer» D. \[C{{H}_{2}}=CH-CH=C{{H}_{2}}\] | |
| 9517. |
IUPAC name of acetyl salicylic acid is [CPMT 1994] |
| A. | m-benzoic acid |
| B. | 2-acetoxy benzoic acid |
| C. | p-benzoic acid |
| D. | p-acetyl benzoic acid |
| Answer» C. p-benzoic acid | |
| 9518. |
The solubility product of a sparingly soluble salt \[AB\] at room temperature is \[1.21\times {{10}^{-6}}\]. Its molar solubility is [CPMT 1987; MP PET 2001] |
| A. | \[1.21\times {{10}^{-6}}\] |
| B. | \[1.21\times {{10}^{-3}}\] |
| C. | \[1.1\times {{10}^{-4}}\] |
| D. | \[1.1\times {{10}^{-4}}\] |
| Answer» E. | |
| 9519. |
Which of the following salts undergoes hydrolysis [CPMT 1972, 74, 78; DPMT 1985] |
| A. | \[C{{H}_{3}}COONa\] |
| B. | \[KN{{O}_{3}}\] |
| C. | \[NaCl\] |
| D. | \[{{K}_{2}}S{{O}_{4}}\] |
| Answer» B. \[KN{{O}_{3}}\] | |
| 9520. |
Formation of 2-butene from 2-bromobutane is according to |
| A. | Markowikoff's |
| B. | Bayer |
| C. | Saytzeff |
| D. | Wurtz |
| Answer» D. Wurtz | |
| 9521. |
If radium and chlorine combine to from radium chloride the compound is [Kerala PMT 2004] |
| A. | No longer radioactive |
| B. | Twice as radioactive as radium |
| C. | Half as radioactive as radium |
| D. | As radioactive as radium |
| E. | Thrice as radioactive as radium |
| Answer» E. Thrice as radioactive as radium | |
| 9522. |
The product of oxidation of \[{{I}^{-}}\] ion by \[MnO_{4}^{-}\] in alkaline medium is |
| A. | \[{{I}_{2}}\] |
| B. | \[IO_{3}^{-}\] |
| C. | \[IO_{4}^{-}\] |
| D. | \[I_{3}^{-}\] |
| Answer» C. \[IO_{4}^{-}\] | |
| 9523. |
Which of the following has minimum freezing point [Pb. PMT 1999] |
| A. | \[0.1M\]\[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\] |
| B. | 0.1 M \[N{{H}_{4}}Cl\] |
| C. | 0.1 M \[BaS{{O}_{4}}\] |
| D. | 0.1 M \[A{{l}_{2}}{{(S{{O}_{4}})}_{3}}\] |
| Answer» E. | |
| 9524. |
Aluminium vessels should not be washed with materials containing washing soda since [KCET 1993] |
| A. | Washing soda is expensive |
| B. | Washing soda is easily decomposed |
| C. | Washing soda reacts with aluminium to form soluble aluminate |
| D. | Washing soda reacts with aluminium to form insoluble aluminium oxide |
| Answer» D. Washing soda reacts with aluminium to form insoluble aluminium oxide | |
| 9525. |
Which one of the following is fluorspar |
| A. | \[Ca{{F}_{2}}\] |
| B. | \[CaO\] |
| C. | \[{{H}_{2}}{{F}_{2}}\] |
| D. | \[CaC{{O}_{3}}\] |
| Answer» B. \[CaO\] | |
| 9526. |
Of the metals \[Be,\] \[Mg,\] \[Ca\] and \[Sr\] of group II A. In the periodic table the least ionic chloride would be formed by [NCERT 1980; CPMT 1980] |
| A. | \[Be\] |
| B. | \[Mg\] |
| C. | \[Ca\] |
| D. | \[Sr\] |
| Answer» B. \[Mg\] | |
| 9527. |
Metallic magnesium is prepared by [BHU 1973, 77] |
| A. | Reduction of \[MgO\] by coke |
| B. | Electrolysis of aqueous solution of \[Mg(N{{O}_{3}})\] |
| C. | Displacement of \[Mg\] by iron from \[MgS{{O}_{4}}\] solution |
| D. | Electrolysis of molten \[MgC{{l}_{2}}\] |
| Answer» E. | |
| 9528. |
Which is the most reactive hydrocarbon in the following [JIPMER 2002] |
| A. | Ethane |
| B. | Ethyne |
| C. | Ethene |
| D. | Methane |
| Answer» C. Ethene | |
| 9529. |
One atmosphere is numerically equal to approximately |
| A. | \[{{10}^{6}}\,\text{dynes }c{{m}^{-2}}\] |
| B. | \[{{10}^{6}}\,\text{dynes }c{{m}^{-2}}\] |
| C. | \[{{10}^{4}}\,\text{dynes }c{{m}^{-2}}\] |
| D. | \[{{10}^{8}}\,\text{dynes }c{{m}^{-2}}\] |
| Answer» B. \[{{10}^{6}}\,\text{dynes }c{{m}^{-2}}\] | |
| 9530. |
Thiophene and benzene are separated by [RPET 2000] |
| A. | Sulphonation of thiophene |
| B. | Sulphonation of benzene |
| C. | Nitration of thiophene |
| D. | Nitration of benzene |
| Answer» C. Nitration of thiophene | |
| 9531. |
In an equilibrium reaction for which \[\Delta {{G}^{0}}=0\] , the equilibrium constant \[K=\] [BHU 1987] |
| A. | 0 |
| B. | 1 |
| C. | 2 |
| D. | 10 |
| Answer» C. 2 | |
| 9532. |
The alkaline earth metals \[Ba,\] \[Sr,\] \[Ca\] and \[Mg\] may be arranged in the order of their decreasing first ionisation potential as [CPMT 1990] |
| A. | \[Mg,\] \[Ca,\] \[Sr,\] \[Ba,\] |
| B. | \[Ca,\] \[Sr,\] \[Ba,\] \[Mg\] |
| C. | \[Sr,\] \[Ba,\] \[Mg,\] \[Ca\] |
| D. | \[Ba,\] \[Mg,\] \[Ca,\] \[Sr,\] |
| Answer» B. \[Ca,\] \[Sr,\] \[Ba,\] \[Mg\] | |
| 9533. |
When Cu reacts with \[AgN{{O}_{3}}\] solution, the reaction takes place is [CPMT 2004] |
| A. | Oxidation of Cu |
| B. | Reduction of Cu |
| C. | Oxidation of Ag |
| D. | Reduction of \[NO_{3}^{-}\] |
| Answer» B. Reduction of Cu | |
| 9534. |
When \[CuS{{O}_{4}}\] is hydrated, then it becomes [AFMC 2003] |
| A. | Acidic |
| B. | basic |
| C. | Neutral |
| D. | Amphoteric |
| Answer» E. | |
| 9535. |
At room temperature solid paraffin is [RPET/PMT 1999] |
| A. | \[{{C}_{3}}{{H}_{8}}\] |
| B. | \[{{C}_{8}}{{H}_{18}}\] |
| C. | \[{{C}_{4}}{{H}_{10}}\] |
| D. | \[{{C}_{20}}{{H}_{42}}\] |
| Answer» E. | |
| 9536. |
A precipitate of \[AgCl\] is formed when equal volumes of the following are mixed. \[[{{K}_{sp}}\] for \[AgCl={{10}^{-10}}]\] [KCET 2005] |
| A. | \[{{10}^{-4}}M\,AgN{{O}_{3}}\] and \[{{10}^{-7}}M\,HCl\] |
| B. | \[{{10}^{-5}}M\,AgN{{O}_{3}}\] and \[{{10}^{-6}}M\,HCl\] |
| C. | \[{{10}^{-5}}M\,AgN{{O}_{3}}\] and \[{{10}^{-4}}M\,HCl\] |
| D. | \[{{10}^{-6}}M\,AgN{{O}_{3}}\] and \[{{10}^{-6}}M\,HCl\] |
| Answer» D. \[{{10}^{-6}}M\,AgN{{O}_{3}}\] and \[{{10}^{-6}}M\,HCl\] | |
| 9537. |
\[0.01M\] solution each of urea, common salt and \[N{{a}_{2}}S{{O}_{4}}\] are taken, the ratio of depression of freezing point is [Roorkee 1990] |
| A. | 1 : 1 : 1 |
| B. | 1 : 2 : 1 |
| C. | 1 : 2 : 3 |
| D. | 2 : 2 : 3 |
| Answer» D. 2 : 2 : 3 | |
| 9538. |
Equivalent weight of crystalline oxalic acid is [MP PMT 1995] |
| A. | 30 |
| B. | 63 |
| C. | 53 |
| D. | 45 |
| Answer» C. 53 | |
| 9539. |
Identify the reaction that doesn't take place during the smelting process of copper extraction [KCET 2003] |
| A. | \[2FeS+3\,{{O}_{2}}\to 2\,FeO+2\,S{{O}_{2}}\uparrow \] |
| B. | \[C{{u}_{2}}O+FeS\to C{{u}_{2}}S+FeO\] |
| C. | \[2C{{u}_{2}}S+3\,{{O}_{2}}\to 2C{{u}_{2}}O+2S{{O}_{2}}\uparrow \] |
| D. | \[FeO+Si{{O}_{2}}\to FeSi{{O}_{3}}\] |
| Answer» D. \[FeO+Si{{O}_{2}}\to FeSi{{O}_{3}}\] | |
| 9540. |
Which of the following is not Lewis acid [RPET/PMT 2002] |
| A. | \[FeC{{l}_{3}}\] |
| B. | \[AlC{{l}_{3}}\] |
| C. | \[BC{{l}_{3}}\] |
| D. | \[N{{H}_{3}}\] |
| Answer» E. | |
| 9541. |
What hybrid orbitals will form the following compound \[{{H}_{3}}C-CH=CH-C{{H}_{2}}-C{{H}_{3}}\] [AFMC 1991] |
| A. | \[sp\] and \[s{{p}^{3}}\] |
| B. | \[s{{p}^{2}}\] and \[s{{p}^{3}}\] |
| C. | \[sp\] and \[s{{p}^{2}}\] |
| D. | Only \[s{{p}^{3}}\] |
| Answer» C. \[sp\] and \[s{{p}^{2}}\] | |
| 9542. |
Soil containing both Al and Fe is called [DPMT 2002] |
| A. | Laterite |
| B. | Bauxite |
| C. | Pedalfers |
| D. | Clay |
| Answer» D. Clay | |
| 9543. |
A mixture of ethane, ethene and ethyne is passed through ammoniacal \[AgN{{O}_{3}}\] solution. The gases which remain unreacted are [CPMT 1990] |
| A. | Ethane and ethene |
| B. | Ethane and ethyne |
| C. | Ethene and ethyne |
| D. | Ethane only |
| Answer» B. Ethane and ethyne | |
| 9544. |
Which of the following pairs of ions would be expected to form precipitate when their dilute solution are mixed [CPMT 1976] |
| A. | \[N{{a}^{+}},\,SO_{3}^{2-}\] |
| B. | \[NH_{4}^{+},\,CO_{3}^{2-}\] |
| C. | \[N{{a}^{+}},\,{{S}^{-2}}\] |
| D. | \[F{{e}^{+3}},\,PO_{4}^{-3}\] |
| Answer» E. | |
| 9545. |
Which of the following does not decolourise bromine solution in carbon disulphide [MP PET 1986] |
| A. | Acetylene |
| B. | Propene |
| C. | Ethane |
| D. | Propyne |
| Answer» D. Propyne | |
| 9546. |
When \[FeC{{l}_{3}}\] gets soluble in water, then its solution represents which of the characteristics [MP PET/PMT 1988] |
| A. | Amphoteric |
| B. | Acidic |
| C. | Basic |
| D. | Neutral |
| Answer» C. Basic | |
| 9547. |
The \[\pi -\]bonded organo metallic compound which has ethene as one of its component is [J & K CET 2005] |
| A. | Zeise's salt |
| B. | Ferrocene |
| C. | Dibenzene chromium |
| D. | Tetraethyl tin. |
| Answer» B. Ferrocene | |
| 9548. |
Which of the following cannot act as a Lewis or Bronsted acid [DCE 2001] |
| A. | \[B{{F}_{3}}\] |
| B. | \[AlC{{l}_{3}}\] |
| C. | \[SnC{{l}_{4}}\] |
| D. | \[CC{{l}_{4}}\] |
| Answer» E. | |
| 9549. |
General formula for carbohydrates is |
| A. | \[{{C}_{n}}{{H}_{2n}}{{O}_{2n+2}}\] |
| B. | \[{{C}_{x}}{{({{H}_{2}}O)}_{2x}}\] |
| C. | \[{{C}_{x}}{{({{H}_{2}}O)}_{y}}\] |
| D. | None of these |
| Answer» D. None of these | |
| 9550. |
The conjugate acid of \[{{S}_{2}}O_{8}^{2-}\] is [EAMCET 1984] |
| A. | \[{{H}_{2}}{{S}_{2}}{{O}_{8}}\] |
| B. | \[{{H}_{2}}S{{O}_{4}}\] |
| C. | \[HSO_{4}^{-}\] |
| D. | \[H{{S}_{2}}O_{8}^{-}\] |
| Answer» E. | |