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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.
| 8851. |
A liquid hydrocarbon can be converted to gaseous hydrocarbon by [CPMT 1980; MP PMT 2001] |
| A. | Cracking |
| B. | Hydrolysis |
| C. | Oxidation |
| D. | Distillation under reduced pressure |
| Answer» B. Hydrolysis | |
| 8852. |
Which cation has smallest radius [RPET 2000] |
| A. | \[{{K}^{+}}\] |
| B. | \[N{{a}^{+}}\] |
| C. | \[L{{i}^{+}}\] |
| D. | \[B{{e}^{2+}}\] |
| Answer» E. | |
| 8853. |
Of the following, the one with largest size is [EAMCET 1997; BHU 1999] |
| A. | \[C{{l}^{-}}\] |
| B. | \[Ar\] |
| C. | \[{{K}^{+}}\] |
| D. | \[C{{a}^{2+}}\] |
| Answer» B. \[Ar\] | |
| 8854. |
In a reversible reaction, the catalyst [KCET 2003] |
| A. | Increases the activation energy of the backward reaction |
| B. | Increases the activation energy of the forward reaction |
| C. | Decreases the activation energy of both, forward and backward reaction |
| D. | Decreases the activation energy of forward reaction |
| Answer» D. Decreases the activation energy of forward reaction | |
| 8855. |
Which of the following is resistant to boiling aqua-regia |
| A. | Polythene |
| B. | Perspex |
| C. | Teflon |
| D. | Bakelite |
| Answer» D. Bakelite | |
| 8856. |
In methane molecule, the hydrogen atoms around carbon are arranged as [DPMT 1980; MNR 1981; MP PET 1997, 99] |
| A. | Square planar |
| B. | Tetrahedral |
| C. | Triangular |
| D. | Octahedral |
| Answer» C. Triangular | |
| 8857. |
If two compounds have the same empirical formula but different molecular formulae they must have [IIT-JEE 1987; Kurukshetra CEE 1998] |
| A. | Different percentage composition |
| B. | Different molecular weight |
| C. | Same viscosity |
| D. | Same vapour density |
| Answer» C. Same viscosity | |
| 8858. |
Molecular weight of an organic acid is given by |
| A. | Equivalent weight ´ basicity |
| B. | \[\frac{\text{Equivalent weight}}{\text{Basicity}}\] |
| C. | \[\frac{\text{Basicity}}{\text{Equivalent weight}}\] |
| D. | Equivalent weight ´ valency |
| Answer» B. \[\frac{\text{Equivalent weight}}{\text{Basicity}}\] | |
| 8859. |
Caprolactam is the monomer of [DCE 2000] |
| A. | Nylon-6 |
| B. | Glyptal |
| C. | P.T.F.E. |
| D. | Melamine |
| Answer» B. Glyptal | |
| 8860. |
The unit of entropy is [CBSE PMT 2002] |
| A. | \[J\,mo{{l}^{-1}}\] |
| B. | \[JK\,mo{{l}^{-1}}\] |
| C. | \[J\,mo{{l}^{-1}}{{K}^{-1}}\] |
| D. | \[{{J}^{-1}}{{K}^{-1}}mo{{l}^{1}}\] |
| Answer» D. \[{{J}^{-1}}{{K}^{-1}}mo{{l}^{1}}\] | |
| 8861. |
What is the concentration of nitrate ions if equal volumes of 0.1 M \[AgN{{O}_{3}}\] and 0.1 M NaCl are mixed together [NCERT 1981; CPMT 1983] |
| A. | 0.1 N |
| B. | 0.2 M |
| C. | 0.05 M |
| D. | 0.25 M |
| Answer» D. 0.25 M | |
| 8862. |
The aqueous solution of aluminium chloride is acidic due to [MNR 1986, 88] |
| A. | Cation hydrolysis |
| B. | Anion hydrolysis |
| C. | Hydrolysis of both anion and cation |
| D. | Dissociation |
| Answer» B. Anion hydrolysis | |
| 8863. |
The number of molecules in \[8.96\ L\] of a gas at \[{{0}^{o}}C\] and 1 atmosphere pressure is approximately [BHU 1993] |
| A. | \[6.02\times {{10}^{23}}\] |
| B. | \[12.04\times {{10}^{23}}\] |
| C. | \[18.06\times {{10}^{23}}\] |
| D. | \[24.08\times {{10}^{22}}\] |
| Answer» E. | |
| 8864. |
On heating with conc. \[{{H}_{2}}S{{O}_{4}},\]sucrose gives [DPMT 1984] |
| A. | CO and \[C{{O}_{2}}\] |
| B. | CO and \[S{{O}_{2}}\] |
| C. | \[CO,\,\,C{{O}_{2}}\] and \[S{{O}_{2}}\] |
| D. | None of these |
| Answer» E. | |
| 8865. |
The half-life period of a radioactive element is 140 days. After 560 days, one gram of the element will reduce to [CPMT 1989; IIT 1986; EAMCET 1992; MP PET 1997; UPSEAT 1999] |
| A. | \[1/2\,g\] |
| B. | \[1/4\,g\] |
| C. | \[1/8\,g\] |
| D. | \[1/16\,g\] |
| Answer» E. | |
| 8866. |
To detect the reducing and non reducing sugars, which of the following test is used [MH CET 2002] |
| A. | Molisch test |
| B. | Biuret test |
| C. | Fehling's test |
| D. | Millions test |
| Answer» D. Millions test | |
| 8867. |
The solubility of \[Ca{{F}_{2}}\] is\[2\times {{10}^{-4}}\,moles/litre.\] Its solubilily product \[({{K}_{sp}})\] is [NCERT 1981; BHU 1983, 86; MP PET 1992; CBSE PMT 1999] |
| A. | \[2.0\times {{10}^{-4}}\] |
| B. | \[4.0\times {{10}^{-3}}\] |
| C. | \[8.0\times {{10}^{-12}}\] |
| D. | \[3.2\times {{10}^{-11}}\] |
| Answer» E. | |
| 8868. |
IUPAC name of the compound \[\overset{4}{\mathop{C}}\,{{H}_{2}}=\overset{3}{\mathop{C}}\,H-\overset{2}{\mathop{C}}\,{{H}_{2}}-\overset{1}{\mathop{C}}\,{{H}_{2}}OH\] is |
| A. | 1-buten-4-ol |
| B. | 3-buten-1-ol |
| C. | 4-hydroxy-1-butene |
| D. | 1-butenol-4 |
| Answer» C. 4-hydroxy-1-butene | |
| 8869. |
The IUPAC name of \[C{{H}_{3}}C{{H}_{2}}COCl\] is |
| A. | Propanoyl chloride |
| B. | Ethanoyl chloride |
| C. | Acetyl chloride |
| D. | Chloroethane |
| Answer» B. Ethanoyl chloride | |
| 8870. |
A radioactive nucleus will not emit [DPMT 2005] |
| A. | Alpha and beta rays simultaneously |
| B. | Beta and gamma rays simultaneously |
| C. | Gamma and alpha rays |
| D. | Gamma rays only |
| Answer» E. | |
| 8871. |
Which of the following is a false statement [CPMT 2004] |
| A. | Fluorine is more electronegative than chlorine |
| B. | Nitrogen has greater \[\text{I}{{\text{E}}_{1}}\]than oxygen |
| C. | Lithium is amphoteric |
| D. | Chlorine is an oxidising agent |
| Answer» D. Chlorine is an oxidising agent | |
| 8872. |
Maximum bond energy of \[C-H\] bonds is found in the compound [RPMT 1999] |
| A. | Ethane |
| B. | Ethene |
| C. | Ethyne |
| D. | Equal in all the three |
| Answer» D. Equal in all the three | |
| 8873. |
Some salts although containing two different metallic elements give test for only one of them in solution. Such salts are [MNR 1979] |
| A. | Double salts |
| B. | Normal salts |
| C. | Complex salts |
| D. | Basic salts |
| Answer» D. Basic salts | |
| 8874. |
Artificial transmutation was discovered by [Pb.CET 2003] |
| A. | Pauli |
| B. | Rutherford |
| C. | Soddy |
| D. | Curie |
| Answer» C. Soddy | |
| 8875. |
The most stable complex among the following is [MP PMT 2002] |
| A. | \[{{K}_{3}}[Al{{({{C}_{2}}{{O}_{4}})}_{3}}]\] |
| B. | \[[Pt{{(en)}_{2}}]C{{l}_{2}}\] |
| C. | \[Ag{{(N{{H}_{3}})}_{2}}Cl\] |
| D. | \[{{K}_{2}}(Ni(EDTA)]\] |
| Answer» E. | |
| 8876. |
Hydrogen bonding is maximum in [UPSEAT 2003] |
| A. | \[{{C}_{2}}{{H}_{5}}OH\] |
| B. | \[C{{H}_{3}}-O-C{{H}_{3}}\] |
| C. | \[{{(C{{H}_{3}})}_{2}}C=O\] |
| D. | \[C{{H}_{3}}CHO\] |
| Answer» B. \[C{{H}_{3}}-O-C{{H}_{3}}\] | |
| 8877. |
The ionic conductance of following cation in a given concentration are in the order [Orissa JEE 2004] |
| A. | \[L{{i}^{+}}<N{{a}^{+}}>{{K}^{+}}<R{{b}^{+}}\] |
| B. | \[L{{i}^{+}}>N{{a}^{+}}>{{K}^{+}}>R{{b}^{+}}\] |
| C. | \[L{{i}^{+}}<N{{a}^{+}}>{{K}^{+}}>R{{b}^{+}}\] |
| D. | \[L{{i}^{+}}=N{{a}^{+}}<{{K}^{+}}<R{{b}^{+}}\] |
| Answer» B. \[L{{i}^{+}}>N{{a}^{+}}>{{K}^{+}}>R{{b}^{+}}\] | |
| 8878. |
Correct energy value order is[Orissa JEE 2004] |
| A. | \[ns\ np\ nd(n-1)f\] |
| B. | \[ns\ np(n-1)d\ (n-2)f\] |
| C. | \[ns\ np(n-1)d\ (n-1)f\] |
| D. | \[ns(n-1)d\ n(n-1)f\] |
| Answer» C. \[ns\ np(n-1)d\ (n-1)f\] | |
| 8879. |
The energy of a radiation of wavelength \[8000\,{AA}\] is \[{{E}_{1}}\]and energy of a radiation of wavelength \[16000\text{ }{AA}\]is \[{{E}_{2}}\]. What is the relation between these two [Kerala CET 2005] |
| A. | \[{{E}_{1}}=6{{E}_{2}}\] |
| B. | \[{{E}_{1}}=2{{E}_{2}}\] |
| C. | \[{{E}_{1}}=4{{E}_{2}}\] |
| D. | \[{{E}_{1}}=1/2{{E}_{2}}\] |
| E. | \[{{E}_{1}}={{E}_{2}}\] |
| Answer» C. \[{{E}_{1}}=4{{E}_{2}}\] | |
| 8880. |
Calcium is obtained by [DPMT 1980; IIT 1980; CPMT 1996;AIIMS 2001] |
| A. | Roasting of lime stone |
| B. | Reduction of \[CaC{{l}_{2}}\] with carbon |
| C. | Electrolysis of a solution of \[CaC{{l}_{2}}\] in water |
| D. | Electrolysis of molten \[CaC{{l}_{2}}\] |
| Answer» E. | |
| 8881. |
Acetylene molecules contain [DCE 1999] |
| A. | 5\[\sigma \] bond |
| B. | 4\[\sigma \] bond and \[1\pi \] bond |
| C. | 3\[\sigma \] and 2\[\pi \] |
| D. | 3\[\sigma \] and 3\[\pi \] |
| Answer» D. 3\[\sigma \] and 3\[\pi \] | |
| 8882. |
On passing vapours of an organic liquid over finely divided Cu at \[573K\] the product was an alkene. This reaction is |
| A. | Catalytic oxidation of primary alcohol |
| B. | Catalytic dehydrogenation of secondary alcohol |
| C. | Catalytic dehydrogenation of tertiary alcohol |
| D. | Catalytic dehydration of tertiary alcohol |
| Answer» E. | |
| 8883. |
The equivalent weight of a metal is 9 and vapour density of its chloride is 59.25. The atomic weight of metal is [Pb. CET 2002] |
| A. | 23.9 |
| B. | 27.3 |
| C. | 36.3 |
| D. | 48.3 |
| Answer» B. 27.3 | |
| 8884. |
Nylon is not a [KCET 2004] |
| A. | Condensation polymer |
| B. | Polyamide |
| C. | Copolymer |
| D. | Homopolymer |
| Answer» E. | |
| 8885. |
Acrilan is a hard, horny and a high melting material. Which of the following represents its structure [CBSE PMT 2003] |
| A. | \[{{\left( -C{{H}_{2}}-\underset{Cl\,\,\,\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,}{\mathop{CH-}}\,}}\, \right)}_{n}}\] |
| B. | \[{{\left( -C{{H}_{2}}-\underset{CN\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,}{\mathop{CH-}}\,}}\, \right)}_{n}}\] |
| C. | \[{{\left( -C{{H}_{2}}\underset{COOC{{H}_{3}}}{\overset{C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,}{\mathop{\underset{\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\overset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{-C-\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}}}\,\,\,}}}\, \right)}_{n}}\] |
| D. | \[{{\left( \underset{COO{{C}_{2}}{{H}_{5}}}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{CH-\,\,\,\,\,\,\,\,\,\,\,\,}}\,}}\, \right)}_{n}}\] |
| Answer» C. \[{{\left( -C{{H}_{2}}\underset{COOC{{H}_{3}}}{\overset{C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,}{\mathop{\underset{\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\overset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{-C-\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}}}\,\,\,}}}\, \right)}_{n}}\] | |
| 8886. |
If M is the molecular weight of \[KMn{{O}_{4}}\], its equivalent weight will be when it is converted into \[{{K}_{2}}Mn{{O}_{4}}\] [MP PET 1993] |
| A. | M |
| B. | M/3 |
| C. | M/5 |
| D. | M/7 |
| Answer» B. M/3 | |
| 8887. |
How is is widely used [MP PET 2002] |
| A. | Insecticide |
| B. | Drug |
| C. | Explosive |
| D. | Dye |
| Answer» D. Dye | |
| 8888. |
Which is formed when benzene is heated with chlorine in the presence of sunlight [CPMT 2000; KCET (Med.) 2000; MP PMT 1993; MP PET 2002 AIIMS 1999] |
| A. | \[{{C}_{6}}{{H}_{5}}CC{{l}_{3}}\] |
| B. | \[{{C}_{6}}{{H}_{5}}CHC{{l}_{2}}\] |
| C. | \[{{C}_{6}}{{H}_{5}}C{{H}_{2}}C{{l}_{2}}\] |
| D. | \[{{C}_{6}}{{H}_{6}}C{{l}_{6}}\] |
| Answer» E. | |
| 8889. |
Which of the following is non-stoichiometric |
| A. | \[F{{e}_{3}}{{O}_{4}}\] |
| B. | \[F{{e}_{2}}{{O}_{3}}\] |
| C. | \[FeO\] |
| D. | All the above |
| Answer» D. All the above | |
| 8890. |
Baeyer's reagent is used in the laboratory for [CBSE PMT 1991, 92; AIIMS 1998; AFMC 1999] |
| A. | Detection of double bonds |
| B. | Detection of glucose |
| C. | Reduction |
| D. | Oxidation |
| Answer» B. Detection of glucose | |
| 8891. |
An example for a double salt is [KCET 2002] |
| A. | Silver nitrate |
| B. | Mohr's salt |
| C. | Potassium ferricyanide |
| D. | Cupromonium sulphate |
| Answer» C. Potassium ferricyanide | |
| 8892. |
Silver nitrate is mainly used [CPMT 1988, 93] |
| A. | In photography |
| B. | In model formation |
| C. | As reducing agent |
| D. | As dehydrating agent |
| Answer» B. In model formation | |
| 8893. |
Kinetic energy of molecules is highest in |
| A. | Gases |
| B. | Solids |
| C. | Liquids |
| D. | Solutions |
| Answer» B. Solids | |
| 8894. |
What is the product when acetylene reacts with hypochlorous acid [RPMT 2002; AIEEE 2002] |
| A. | \[C{{H}_{3}}COCl\] |
| B. | \[ClC{{H}_{2}}CHO\] |
| C. | \[C{{l}_{2}}CHCHO\] |
| D. | \[ClCHCOOH\] |
| Answer» D. \[ClCHCOOH\] | |
| 8895. |
When petroleum is heated the vapours contain mainly [CPMT 1981] |
| A. | Kerosene |
| B. | Petroleum ether |
| C. | Diesel |
| D. | Machine oil |
| Answer» C. Diesel | |
| 8896. |
Photochemical chlorination of alkane is initiated by a process of [Kerala PMT 2004] |
| A. | Pyrolysis |
| B. | Substitution |
| C. | Cracking |
| D. | Peroxidation |
| E. | Homolysis |
| Answer» F. | |
| 8897. |
In which state, the matter have highest entropy |
| A. | Solid |
| B. | Liquid |
| C. | Gas |
| D. | Equal in all |
| Answer» D. Equal in all | |
| 8898. |
What is the minimum concentration of \[SO_{4}^{2-}\] required to precipitate \[BaS{{O}_{4}}\] in a solution containing \[1.0\times {{10}^{-4}}mol\,\,\,B{{a}^{2+}}\]? (\[{{K}_{sp}}\]for \[BaS{{O}_{4}}\] is \[4\times {{10}^{-10}}\]) [MP PMT 2000] |
| A. | \[4\times {{10}^{-10}}M\] |
| B. | \[2\times {{10}^{-7}}M\] |
| C. | \[4\times {{10}^{-6}}M\] |
| D. | \[2\times {{10}^{-3}}M\] |
| Answer» D. \[2\times {{10}^{-3}}M\] | |
| 8899. |
Which of the following is the best scientific method to test the presence of water in a liquid [JIPMER 2001] |
| A. | Use of anhydrous copper sulphate |
| B. | Use of litmus paper |
| C. | Taste |
| D. | Smell |
| Answer» B. Use of litmus paper | |
| 8900. |
Which is not a characteristic of a catalyst [AFMC 1992] |
| A. | It changes the equilibrium constant |
| B. | It alters the reaction path |
| C. | It increases the rate of reaction |
| D. | It increases the average K.E. of the molecules |
| Answer» B. It alters the reaction path | |