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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.
| 10051. |
The IUPAC name of \[C{{H}_{3}}C{{H}_{2}}\underset{C{{H}_{3}}\,\,\,\,\,\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{CHC{{H}_{2}}}}\,}}\,C{{H}_{2}}C{{H}_{3}}\] is [EAMCET 1991] |
| A. | 4-methylhexane |
| B. | 3-methylhexane |
| C. | 2-propylbutane |
| D. | 2-ethylpentane |
| Answer» C. 2-propylbutane | |
| 10052. |
Disintegration constant for a radioactive substance is 0.58\[h{{r}^{-1}}\]. Its half-life period [BHU 2004] |
| A. | 8.2 hr |
| B. | 5.2 hr |
| C. | 1.2 hr |
| D. | 2.4 hr |
| Answer» D. 2.4 hr | |
| 10053. |
Alicyclic compounds are [CPMT 1976] |
| A. | Aromatic |
| B. | Aliphatic |
| C. | Heterocyclic |
| D. | Aliphatic cyclic |
| Answer» E. | |
| 10054. |
Point out the wrong statement : On moving horizontally from left to right across a period in the periodic table |
| A. | Metallic character decreases |
| B. | Electronegativity increases |
| C. | Gram atomic volume first decreases and then increases |
| D. | Size of the atoms increases for normal elements |
| Answer» E. | |
| 10055. |
Which of the following has largest ionic radius [AFMC 1999; BHU 2003] |
| A. | \[C{{s}^{+}}\] |
| B. | \[L{{i}^{+}}\] |
| C. | \[N{{a}^{+}}\] |
| D. | \[{{K}^{+}}\] |
| Answer» B. \[L{{i}^{+}}\] | |
| 10056. |
The blue colour of water in the sea is due to [NCERT 1983] |
| A. | Refraction of blue light by the impurities in sea water |
| B. | Reflection of blue sky by sea water |
| C. | Scattering of blue light by water moleules |
| D. | Absorption of other colours except the blue colour by water molecules |
| Answer» D. Absorption of other colours except the blue colour by water molecules | |
| 10057. |
The conjugate base of a strong acid is a [EAMCET 1978] |
| A. | Strong base |
| B. | Strong acid |
| C. | Weak acid |
| D. | Weak base |
| Answer» E. | |
| 10058. |
2-methyl-2-butene will be represented as [CBSE PMT 1992] |
| A. | \[C{{H}_{3}}-\underset{C{{H}_{3}}}{\mathop{\underset{|\,\,\,\,}{\mathop{CH}}\,}}\,-C{{H}_{2}}-C{{H}_{3}}\] |
| B. | \[C{{H}_{3}}-\underset{C{{H}_{3}}}{\mathop{\underset{|\,\,\,\,}{\mathop{C=}}\,}}\,CH-C{{H}_{3}}\] |
| C. | \[C{{H}_{3}}-C{{H}_{2}}-\overset{C{{H}_{3}}}{\mathop{\overset{|\,\,\,\,\,}{\mathop{C=}}\,}}\,C{{H}_{2}}\] |
| D. | \[C{{H}_{3}}-\underset{C{{H}_{3}}}{\mathop{\underset{|\,\,\,\,}{\mathop{CH-}}\,}}\,CH=C{{H}_{2}}\] |
| Answer» C. \[C{{H}_{3}}-C{{H}_{2}}-\overset{C{{H}_{3}}}{\mathop{\overset{|\,\,\,\,\,}{\mathop{C=}}\,}}\,C{{H}_{2}}\] | |
| 10059. |
If the half-cell reaction \[A+{{e}^{-}}\to \,{{A}^{-}}\] has a large negative reduction potential, it follows that [MNR 1992; UPSEAT 2000, 02] |
| A. | \[A\] is readily reduced |
| B. | \[A\] is readily oxidised |
| C. | \[{{A}^{-}}\] is readily reduced |
| D. | \[{{A}^{-}}\] is readily oxidized |
| Answer» E. | |
| 10060. |
What is the equivalent mass of \[IO_{4}^{-}\] when it is converted into \[{{I}_{2}}\] in acid medium [Kerala PMT 2004] |
| A. | M/6 |
| B. | M/7 |
| C. | M/5 |
| D. | M/4 |
| E. | None of these |
| Answer» C. M/5 | |
| 10061. |
A mixture of \[KCl\] and \[KF\] is added to sodium chloride |
| A. | To increase the conductivity of \[NaCl\] |
| B. | To decrease the melting point of \[NaCl\] |
| C. | To supress the degree of dissociation of \[NaCl\] |
| D. | To decrease the volatility of \[NaCl\] |
| Answer» C. To supress the degree of dissociation of \[NaCl\] | |
| 10062. |
Chile saltpetre is [DPMT 1984; CPMT 1986, 89; CET Pune 1998; MP PMT 2003] |
| A. | \[NaN{{O}_{3}}\] |
| B. | \[N{{a}_{2}}S{{O}_{4}}\] |
| C. | \[KN{{O}_{3}}\] |
| D. | \[N{{a}_{2}}S{{O}_{3}}\] |
| Answer» B. \[N{{a}_{2}}S{{O}_{4}}\] | |
| 10063. |
On heating anhydrous \[N{{a}_{2}}C{{O}_{3}}\], ........ is evolved [CPMT 1971, 79] |
| A. | \[C{{O}_{2}}\] |
| B. | Water vapour |
| C. | \[CO\] |
| D. | No gas |
| Answer» E. | |
| 10064. |
The reference compound `iso-octane' which is used in determining the octane number of gasoline has the structure |
| A. | \[C{{H}_{3}}-CH(C{{H}_{3}})-CH(C{{H}_{3}})-CH(C{{H}_{3}})-C{{H}_{3}}\] |
| B. | \[C{{H}_{3}}-C{{(C{{H}_{3}})}_{2}}-C{{H}_{2}}-CH(C{{H}_{3}})-C{{H}_{3}}\] |
| C. | \[C{{H}_{3}}-C{{(C{{H}_{3}})}_{2}}-CH(C{{H}_{3}})-C{{H}_{2}}-C{{H}_{3}}\] |
| D. | \[C{{H}_{3}}-C{{(C{{H}_{3}})}_{2}}-C{{(C{{H}_{3}})}_{2}}-C{{H}_{3}}\] |
| Answer» C. \[C{{H}_{3}}-C{{(C{{H}_{3}})}_{2}}-CH(C{{H}_{3}})-C{{H}_{2}}-C{{H}_{3}}\] | |
| 10065. |
In galvanic cell, the salt bridge is used to [MP PMT 2002] |
| A. | Complete the circuit |
| B. | Reduce the electric resistance in the cell |
| C. | Separate cathode from anode |
| D. | Carry salts for the chemical reaction |
| Answer» B. Reduce the electric resistance in the cell | |
| 10066. |
\[CH\equiv CH\underset{\text{Pressure}}{\mathop{\xrightarrow{Ni{{(CN)}_{2}}}X}}\,\] . Here X in the reaction [JIPMER 2002] |
| A. | Benzene |
| B. | Ethane |
| C. | Cycloctatetraene |
| D. | Cyclohexane |
| Answer» D. Cyclohexane | |
| 10067. |
Which of the following is a disaccharide [CPMT 1990, 94] |
| A. | Lactose |
| B. | Starch |
| C. | Cellulose |
| D. | Glucose |
| Answer» B. Starch | |
| 10068. |
The alkali metal that reacts with nitrogen directly to form nitride is [Roorkee 1992; MP PMT 2000; BHU 2000] |
| A. | \[Li\] |
| B. | \[Na\] |
| C. | \[K\] |
| D. | \[Rb\] |
| Answer» B. \[Na\] | |
| 10069. |
Alkali metals lose electrons in [CBSE PMT 1990] |
| A. | s-orbitals |
| B. | p-orbitals |
| C. | d-orbitals |
| D. | f-orbitals |
| Answer» B. p-orbitals | |
| 10070. |
Which one of the following ions has the highest value of ionic radius[AIEEE 2004] |
| A. | \[{{O}^{2-}}\] |
| B. | \[{{B}^{3+}}\] |
| C. | \[L{{i}^{+}}\] |
| D. | \[{{F}^{-}}\] |
| Answer» B. \[{{B}^{3+}}\] | |
| 10071. |
Which has the maximum atomic radius [CPMT 1975; AIIMS 1982; DPMT 1982] |
| A. | \[Al\] |
| B. | \[Si\] |
| C. | P |
| D. | \[Mg\] |
| Answer» E. | |
| 10072. |
Chromatography is a valuable method for the separation, isolation, purification and identification of the constituents of a mixture and it is based on general principle of [Kerala (Med.) 2002] |
| A. | Phase rule |
| B. | Phase distribution |
| C. | Interphase separation |
| D. | Phase operation |
| Answer» B. Phase distribution | |
| 10073. |
The distinguishing test for triple bond containing acidic hydrogen is [JIPMER 2000] |
| A. | \[Ag{{(N{{H}_{3}})}_{2}}^{+}\] |
| B. | \[B{{r}_{2}}\]in \[CC{{l}_{4}}\] |
| C. | Alkaline\[KMn{{O}_{4}}\] |
| D. | \[AlC{{l}_{3}}\] |
| Answer» B. \[B{{r}_{2}}\]in \[CC{{l}_{4}}\] | |
| 10074. |
Which of the following electrolytes is least effective in causing flocculation of ferric hydroxide sol [MNR 1991; UPSEAT 1999] |
| A. | \[{{K}_{4}}[Fe{{(CN)}_{6}}]\] |
| B. | \[{{K}_{2}}Cr{{O}_{4}}\] |
| C. | \[KBr\] |
| D. | \[{{K}_{2}}S{{O}_{4}}\] |
| Answer» D. \[{{K}_{2}}S{{O}_{4}}\] | |
| 10075. |
Copper pyrites are concentrated by [MNR 1995; UPSEAT 1999; AMU 1999; MP PMT 2003] |
| A. | Electromagnetic method |
| B. | Gravity method |
| C. | Froth floatation process |
| D. | All the above methods |
| Answer» D. All the above methods | |
| 10076. |
Catalyst used in the oxidation of \[S{{O}_{2}}\to S{{O}_{3}}\] [AIIMS 1996] |
| A. | Nickel |
| B. | \[ZnO.C{{r}_{2}}{{O}_{3}}\] |
| C. | \[{{V}_{2}}{{O}_{5}}\] |
| D. | Iron |
| Answer» D. Iron | |
| 10077. |
The increase in equivalent conductance of an electrolyte solution with dilution is due to the increase in [MP PMT 1996] |
| A. | Ionic attraction |
| B. | Molecular attraction |
| C. | Degree of association of the electrolyte |
| D. | Degree of ionisation of the electrolyte |
| Answer» E. | |
| 10078. |
The IUPAC name of the compound \[C{{H}_{3}}-C{{H}_{2}}-\overset{OC{{H}_{3}}\,\,\,\,\,\,\,}{\mathop{\overset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{CH-C{{H}_{2}}}}\,}}\,-OH\] is [BHU 2004] |
| A. | 2-methoxy-1-butanol |
| B. | 3-methoxy-1-butanol |
| C. | 2-methoxy-1-butanol |
| D. | 1, 2-methoxy-butanol |
| Answer» B. 3-methoxy-1-butanol | |
| 10079. |
Names of some compounds are given. Which one is not in IUPAC system [CBSE PMT 2005] |
| A. | \[\underset{\text{3-Methyl-2-bulanol}}{\mathop{C{{H}_{3}}\underset{OH\,\,\,\,\,C{{H}_{3}}\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,}{\mathop{-CH-CH-}}\,}}\,C{{H}_{3}}}}\,\] |
| B. | \[\underset{\text{4-Methyl-2-pentyne}}{\mathop{C{{H}_{3}}-C\equiv C-CH{{(C{{H}_{3}})}_{2}}}}\,\] |
| C. | \[\underset{\text{2-Ethyl-3-methyl-bul-1-ene}}{\mathop{C{{H}_{3}}-C{{H}_{2}}\underset{C{{H}_{2}}\,C{{H}_{3}}}{\mathop{\underset{||\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,}{\mathop{-C-CH-}}\,}}\,C{{H}_{3}}}}\,\] |
| D. | \[\underset{\text{3-Methyl-4-ethyl heptane}}{\mathop{C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-\underset{C{{H}_{2}}C{{H}_{3}}\,\,\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{CH-\overset{C{{H}_{3}}}{\mathop{\overset{|\,\,\,\,\,\,\,\,\,\,}{\mathop{CH-}}\,}}\,}}\,}}\,C{{H}_{2}}C{{H}_{3}}}}\,\] |
| Answer» E. | |
| 10080. |
Major product of the following reaction is \[C{{H}_{3}}\underset{H}{\mathop{\underset{|}{\mathop{\overset{Br}{\mathop{\overset{|}{\mathop{-C-}}\,}}\,}}\,}}\,C{{H}_{2}}-C{{H}_{3}}+alco.\,KOH\to \] [MP PMT 1986] |
| A. | Butene-1 |
| B. | Butene-2 |
| C. | Butane |
| D. | Butyne-1 |
| Answer» C. Butane | |
| 10081. |
Ferric hydroxide sol is positively charged colloid. The coagulating power of \[NO_{3}^{-},\,SO_{4}^{2-}\] and \[PO_{4}^{3-}\] ions would be in the order |
| A. | \[NO_{3}^{-}>SO_{4}^{2-}>PO_{4}^{3-}\] |
| B. | \[SO_{4}^{2-}>NO_{3}^{-}>PO_{4}^{3-}\] |
| C. | \[PO_{4}^{3-}>SO_{4}^{2-}>NO_{3}^{-}\] |
| D. | \[NO_{3}^{-}=SO_{4}^{2-}=PO_{4}^{3-}\] |
| Answer» D. \[NO_{3}^{-}=SO_{4}^{2-}=PO_{4}^{3-}\] | |
| 10082. |
Which one of the following is not isoelectronic with \[{{O}^{2-}}\] [CBSE PMT 1994] |
| A. | \[{{N}^{3-}}\] |
| B. | \[{{F}^{-}}\] |
| C. | \[T{{l}^{+}}\] |
| D. | \[N{{a}^{+}}\] |
| Answer» D. \[N{{a}^{+}}\] | |
| 10083. |
A solution of 10 ml \[\frac{M}{10}FeS{{O}_{4}}\]was titrated with \[KMn{{O}_{4}}\]solution in acidic medium. The amount of \[KMn{{O}_{4}}\]used will be [CPMT 1984] |
| A. | 5 ml of 0.1 M |
| B. | 10 ml of 1.1 M |
| C. | 10 ml of 0.5 M |
| D. | 10 ml of 0.02 M |
| Answer» E. | |
| 10084. |
Which of the followign is the green coloured powder produced when ammonium dichromate is used in fire works [J & K 2005] |
| A. | \[Cr\] |
| B. | \[Cr{{O}_{3}}\] |
| C. | \[C{{r}_{2}}{{O}_{3}}\] |
| D. | \[CrO({{O}_{2}})\] |
| Answer» D. \[CrO({{O}_{2}})\] | |
| 10085. |
Which shows weak ionisation in water [MH CET 2001] |
| A. | \[{{H}_{2}}S{{O}_{4}}\] |
| B. | \[NaCl\] |
| C. | \[HN{{O}_{3}}\] |
| D. | \[N{{H}_{3}}\] |
| Answer» E. | |
| 10086. |
Lithopone is [AFMC 1992; BHU 1983, 86, 95; JIPMER 1999; RPET/PMT 1999] |
| A. | \[BaO+ZnS{{O}_{4}}\] |
| B. | \[ZnO+BaS{{O}_{4}}\] |
| C. | \[BaS+ZnS{{O}_{4}}\] |
| D. | \[ZnS+BaS{{O}_{4}}\] |
| Answer» E. | |
| 10087. |
Mixture of \[MgC{{l}_{2}}\] and \[MgO\] is called [DPMT 1984] |
| A. | Double salt |
| B. | Sorrel cement |
| C. | Portland cement |
| D. | None of these |
| Answer» C. Portland cement | |
| 10088. |
\[KMn{{O}_{4}}\] reacts with oxalic acid according to the equation, \[2MnO_{4}^{-}+5{{C}_{2}}O_{4}^{2-}+16{{H}^{+}}\to 2M{{n}^{2+}}+10C{{O}_{2}}+8{{H}_{2}}O\], here 20 ml of 0.1 M \[KMn{{O}_{4}}\] is equivalent to [CBSE PMT 1996] |
| A. | 20 ml of 0.5 M \[{{H}_{2}}{{C}_{2}}{{O}_{4}}\] |
| B. | 50 ml of 0.1 M \[{{H}_{2}}{{C}_{2}}{{O}_{4}}\] |
| C. | 50 ml of 0.5 M \[{{H}_{2}}{{C}_{2}}{{O}_{4}}\] |
| D. | 20 ml of 0.1 M \[{{H}_{2}}{{C}_{2}}{{O}_{4}}\] |
| Answer» C. 50 ml of 0.5 M \[{{H}_{2}}{{C}_{2}}{{O}_{4}}\] | |
| 10089. |
Light scattering in colloidal particles is |
| A. | Visible to naked eye |
| B. | Not visible by any means |
| C. | Visible under ordinary microscope |
| D. | Visible under ultra-microscope |
| Answer» E. | |
| 10090. |
Pure conc. \[HN{{O}_{3}}\]makes iron passive as the surface is covered with protective layer of [Orrisa JEE 2002; EAMCET 1993] |
| A. | \[F{{e}_{2}}{{O}_{3}}\] |
| B. | FeO |
| C. | \[F{{e}_{3}}{{O}_{4}}\] |
| D. | \[Fe{{(N{{O}_{3}})}_{3}}\] |
| Answer» D. \[Fe{{(N{{O}_{3}})}_{3}}\] | |
| 10091. |
Select the molecule which has only one \[\pi -\text{bond}\] [Pb. PMT 1998] |
| A. | \[CH\equiv CH\] |
| B. | \[C{{H}_{2}}=CHCHO\] |
| C. | \[C{{H}_{3}}CH=C{{H}_{2}}\] |
| D. | \[C{{H}_{3}}CH=CHCOOH\] |
| Answer» D. \[C{{H}_{3}}CH=CHCOOH\] | |
| 10092. |
Which of the following compounds volatilises on heating [BHU 1998] |
| A. | \[MgC{{l}_{2}}\] |
| B. | \[HgC{{l}_{2}}\] |
| C. | \[CaC{{l}_{2}}\] |
| D. | \[FeC{{l}_{3}}\] |
| Answer» C. \[CaC{{l}_{2}}\] | |
| 10093. |
In a double bond between two carbon atoms of ethene, there are [NCERT 1981] |
| A. | Two sigma bonds perpendicular to each other |
| B. | One sigma and one pi bond |
| C. | Two pi bonds perpendicular to each other |
| D. | Two pi bonds at an angle of \[{{60}^{o}}\] |
| Answer» C. Two pi bonds perpendicular to each other | |
| 10094. |
The ratio of the molar amounts of \[{{H}_{2}}S\] needed to precipitate the metal ions from \[20mL\] each of \[1M\ Cd{{(N{{O}_{3}})}_{2}}\] and \[0.5M\ CuS{{O}_{4}}\] is [CPMT 1997] |
| A. | 1 : 1 |
| B. | 2 : 1 |
| C. | 1 : 2 |
| D. | Indefinite |
| Answer» C. 1 : 2 | |
| 10095. |
Which of the following metal has stable carbonates [AFMC 2004] |
| A. | Na |
| B. | Mg |
| C. | Al |
| D. | Si |
| Answer» B. Mg | |
| 10096. |
A fire of lithium, sodium and potassium can be extinguished by [DCE 2003] |
| A. | \[{{H}_{2}}O\] |
| B. | Nitrogen |
| C. | \[C{{O}_{2}}\] |
| D. | Asbestos blanket |
| Answer» D. Asbestos blanket | |
| 10097. |
Which is a reducing sugar |
| A. | Glucose |
| B. | Fructose |
| C. | Galactose |
| D. | All of these |
| Answer» E. | |
| 10098. |
Which statement is correct |
| A. | For potassium, the atomic radius < ionic radius; but for bromine, the atomic radius > ionic radius |
| B. | For potassium and bromine both, the atomic radii > ionic radii |
| C. | For potassium and bromine both, the atomic radii < ionic radii |
| D. | For potassium, the atomic radius > ionic radius but for bromine, the atomic radius < ionic radius |
| Answer» E. | |
| 10099. |
The order of the magnitude of ionic radii of ions \[{{N}^{3-}},{{O}^{2-}}\] and \[{{F}^{-}}\]is [MP PMT 1996] |
| A. | \[{{N}^{3-}}>{{O}^{2-}}>{{F}^{-}}\] |
| B. | \[{{N}^{3-}}<{{O}^{2-}}<{{F}^{-}}\] |
| C. | \[{{N}^{3-}}>{{O}^{2-}}>{{F}^{-}}\] |
| D. | \[{{N}^{3-}}<{{O}^{2-}}>{{F}^{-}}\] |
| Answer» B. \[{{N}^{3-}}<{{O}^{2-}}<{{F}^{-}}\] | |
| 10100. |
The order of magnitude of ionic radii of ions \[N{{a}^{+}},M{{g}^{2+}},A{{l}^{3+}}\] and \[S{{i}^{4+}}\] is [MP PMT 1996] |
| A. | \[N{{a}^{+}}<M{{g}^{2+}}<A{{l}^{3+}}<S{{i}^{4+}}\] |
| B. | \[M{{g}^{2+}}>N{{a}^{+}}>A{{l}^{3+}}>S{{i}^{4+}}\] |
| C. | \[A{{l}^{3+}}>N{{a}^{+}}>S{{i}^{4+}}>M{{g}^{2+}}\] |
| D. | \[N{{a}^{+}}>M{{g}^{2+}}>A{{l}^{3+}}>S{{i}^{4+}}\] |
| Answer» E. | |