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.
| 9051. |
Which of the alkaline earth metals is strongest reducing agent [MP PMT 1995] |
| A. | \[Ca\] |
| B. | \[Sr\] |
| C. | \[Ba\] |
| D. | \[Mg\] |
| Answer» D. \[Mg\] | |
| 9052. |
An example of chain growth polymer is [Pb. PMT 1999] |
| A. | Nylon-66 |
| B. | Bakelite |
| C. | Terylene |
| D. | Teflon |
| Answer» E. | |
| 9053. |
What is lye [BHU 1997] |
| A. | 10% solution of \[NaCl\] |
| B. | 10% solution of \[KOH\] |
| C. | 10% solution of \[Ca{{(OH)}_{2}}\] |
| D. | 10% solution of \[N{{a}_{2}}C{{O}_{3}}\] |
| Answer» C. 10% solution of \[Ca{{(OH)}_{2}}\] | |
| 9054. |
Which oxide of manganese is amphoteric [AFMC 1995] |
| A. | \[Mn{{O}_{2}}\] |
| B. | \[M{{n}_{2}}{{O}_{3}}\] |
| C. | \[M{{n}_{2}}{{O}_{7}}\] |
| D. | \[MnO\] |
| Answer» B. \[M{{n}_{2}}{{O}_{3}}\] | |
| 9055. |
Glucose has difference from fructose in that it [BHU 2005] |
| A. | Does not undergo hydrolysis |
| B. | Gives silver mirror with Tollen's reagent |
| C. | Monosaccharide |
| D. | None of these |
| Answer» E. | |
| 9056. |
When sucrose is heated with conc. \[HN{{O}_{3}}\] the product is [CPMT 1979] |
| A. | Sucrose nitrate |
| B. | Formic acid |
| C. | Oxalic acid |
| D. | Citric acid |
| Answer» D. Citric acid | |
| 9057. |
The substance that forms the plant cell walls is or Which carbohydrates is an essential constituents of plant cells [KCET 1984; MP PET 1999; CPMT 2002] |
| A. | Cellulose |
| B. | Sucrose |
| C. | Vitamins |
| D. | Starch |
| Answer» B. Sucrose | |
| 9058. |
That ion or molecule which forms a complex compound with transitional metal ion is called |
| A. | Recipient |
| B. | Ligand |
| C. | Coordinate ion |
| D. | No special name |
| Answer» C. Coordinate ion | |
| 9059. |
Which of the following method can be used for the preparation of methane |
| A. | Wurtz reaction |
| B. | Kolbe's reaction |
| C. | Reduction of alkyl halide |
| D. | Hydrogenation of alkene |
| Answer» D. Hydrogenation of alkene | |
| 9060. |
The product of following reaction is \[\underset{C{{H}_{3}}\,\,\,\,\,\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\overset{C{{H}_{3}}\,\,\,\,\,}{\mathop{\overset{\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{C{{H}_{3}}-C-CH=C{{H}_{2}}}}\,}}\,}}\,}}\,\underset{\text{(ii) }NaB{{H}_{4}}}{\mathop{\xrightarrow{(i)\text{ }Hg{{(OAc)}_{2}};{{H}_{2}}O}}}\,\] [MP PMT 1986; MP PET 1997] |
| A. | \[\underset{C{{H}_{3}}\,OH}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,}{\mathop{\overset{C{{H}_{2}}\,\,\,\,\,}{\mathop{\overset{\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{C{{H}_{3}}-C-CH-C{{H}_{2}}}}\,}}\,}}\,}}\,\] |
| B. | \[\underset{C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\overset{\,\,C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\overset{\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{C{{H}_{3}}-C-C{{H}_{2}}-C{{H}_{2}}OH}}\,}}\,}}\,}}\,\] |
| C. | \[\underset{C{{H}_{3}}\,\,\,\,\,\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\overset{\,\,OH\,C{{H}_{3}}}{\mathop{\overset{\,|\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,}{\mathop{C{{H}_{3}}-C-CH-C{{H}_{3}}}}\,}}\,}}\,}}\,\] |
| D. | \[\underset{C{{H}_{3}}\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,}{\mathop{\overset{\,\,C{{H}_{3}}\,}{\mathop{\overset{\,|\,\,\,\,\,\,\,\,\,\,\,}{\mathop{HOC{{H}_{2}}-C-C{{H}_{2}}-C{{H}_{2}}}}\,}}\,}}\,}}\,\] |
| Answer» B. \[\underset{C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\overset{\,\,C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\overset{\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{C{{H}_{3}}-C-C{{H}_{2}}-C{{H}_{2}}OH}}\,}}\,}}\,}}\,\] | |
| 9061. |
The substance that sublimes on heating [EAMCET 1978, 82; MP PMT 1999] |
| A. | Magnesium chloride |
| B. | Silver chloride |
| C. | Mercurous chloride |
| D. | Sodium chloride |
| Answer» D. Sodium chloride | |
| 9062. |
In the reaction \[2{{H}_{2}}O\]⇄\[{{H}_{3}}{{O}^{+}}+O{{H}^{-}}\], water is [MP PET 1989] |
| A. | A weak base |
| B. | A weak acid |
| C. | Both a weak acid and a weak base |
| D. | Neither an acid nor a base |
| Answer» D. Neither an acid nor a base | |
| 9063. |
The energy released in an atom bomb explosion is mainly due to [BVP 2003] |
| A. | Release of neutrons |
| B. | Release of electrons |
| C. | Greater mass of products than initial material |
| D. | Lesser mass of products than initial material |
| Answer» E. | |
| 9064. |
Which of the following is an example of nuclear fusion [MP PMT 1989; DCE 2004] |
| A. | \[_{1}{{H}^{2}}+{{\,}_{1}}{{H}^{2}}\to {{\,}_{2}}H{{e}^{4}}+\]energy |
| B. | \[_{92}{{U}^{235}}+{{\,}_{o}}{{n}^{1}}\to {{\,}_{56}}B{{a}^{141}}+{{\,}_{36}}K{{r}^{92}}+{{\,}_{30}}{{n}^{1}}+\]energy |
| C. | \[_{13}A{{l}^{27}}+{{\,}_{1}}{{H}^{1}}\to {{\,}_{12}}M{{g}^{24}}+{{\,}_{2}}H{{e}^{4}}\] |
| D. | None of these |
| Answer» B. \[_{92}{{U}^{235}}+{{\,}_{o}}{{n}^{1}}\to {{\,}_{56}}B{{a}^{141}}+{{\,}_{36}}K{{r}^{92}}+{{\,}_{30}}{{n}^{1}}+\]energy | |
| 9065. |
\[_{72}^{180}X\xrightarrow{2\alpha }\xrightarrow{\beta }\xrightarrow{\gamma }\,_{Z}^{A}{X}'\].\[Z\] and \[A\]are [DPMT 2005] |
| A. | 69, 172 |
| B. | 172, 69 |
| C. | 180, 70 |
| D. | 182, 68 |
| Answer» B. 172, 69 | |
| 9066. |
When butene-1 is mixed with excess of bromine, the expected reaction product is [CPMT 1974; BHU 1980] |
| A. | 1, 2-dibromobutane |
| B. | 1, 1-dibromobutane |
| C. | 2, 2-dibromobutane |
| D. | Perbromobutane |
| Answer» B. 1, 1-dibromobutane | |
| 9067. |
Iron is rendered passive by the action of [IIT 1982; MP PET 1985; MP PMT 1987; DPMT 1984; KCET 1993] |
| A. | Conc. \[{{H}_{2}}S{{O}_{4}}\] |
| B. | Conc. \[{{H}_{3}}P{{O}_{4}}\] |
| C. | Conc. \[HCl\] |
| D. | Conc. \[HN{{O}_{3}}\] |
| Answer» E. | |
| 9068. |
The reason for almost doubling the rate of reaction on increasing the temperature of the reaction system by \[{{10}^{oC}}\] is [J & K 2005] |
| A. | The value of threshold energy increases |
| B. | Collision frequency increases |
| C. | The fraction of the molecule having energy equal to threshold energy or more increases |
| D. | Activation energy decreases |
| Answer» C. The fraction of the molecule having energy equal to threshold energy or more increases | |
| 9069. |
The correct IUPAC name of \[{{H}_{2}}C=CH-\underset{C{{H}_{3}}}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,}{\mathop{CH\,}}\,}}\,-C{{H}_{2}}C\equiv CH\] [Roorkee 2000] |
| A. | 3-methyl-1-hexen-5-yne |
| B. | 4-methyl-5-hexen-1-yne |
| C. | 4-(ethenyl)-1-pentyne |
| D. | 3-(2-propenyl) butene-1 |
| Answer» B. 4-methyl-5-hexen-1-yne | |
| 9070. |
In a electrochemical cell [AFMC 1989] |
| A. | Potential energy changes into kinetic energy |
| B. | Kinetic energy changes into potential energy |
| C. | Chemical energy changes into electrical energy |
| D. | Electrical energy changes into chemical energy |
| Answer» D. Electrical energy changes into chemical energy | |
| 9071. |
Which of the following intermolecular forces are present in ?nylon ? 66? [JIPMER 1997] |
| A. | Vander Waals |
| B. | Hydrogen bonding |
| C. | Dipole-dipole interaction |
| D. | None of these |
| Answer» C. Dipole-dipole interaction | |
| 9072. |
Which of the following fibres are made of polyamides [CPMT 1982; NCERT 1981; MNR 1992; DCE 1999; UPSEAT 2001, 02] |
| A. | Dacron |
| B. | Orlon |
| C. | Nylon |
| D. | Rayon |
| Answer» D. Rayon | |
| 9073. |
The sterile gauze (or cotton) used in medicine is obtained by oxidising cellulose with |
| A. | Nitrogen |
| B. | \[KMn{{O}_{4}}\] |
| C. | Nitrogen dioxide |
| D. | Potassium chlorate |
| Answer» D. Potassium chlorate | |
| 9074. |
Cassiterite is concentrated by [EAMCET 1998] |
| A. | Levigation |
| B. | Electromagnetic separation |
| C. | Floatation |
| D. | Liquifaction |
| Answer» C. Floatation | |
| 9075. |
In a chain reaction, uranium atom gets fissioned forming two different materials. The total weight of these put together is [EAMCET 1986] |
| A. | More than the weight of parent uranium atom |
| B. | Less than the weight of parent uranium atom |
| C. | More or less depends upon experimental conditions |
| D. | Neither more nor less |
| Answer» C. More or less depends upon experimental conditions | |
| 9076. |
Lewis base is [RPMT 1997] |
| A. | \[C{{O}_{2}}\] |
| B. | \[S{{O}_{3}}\] |
| C. | \[S{{O}_{2}}\] |
| D. | \[ROH\] |
| Answer» E. | |
| 9077. |
Group displacement law was given by [DPMT 1984] |
| A. | Becquerel |
| B. | Rutherford |
| C. | Soddy and Fajan |
| D. | Madam Curie |
| Answer» D. Madam Curie | |
| 9078. |
The decreasing order of boiling points is [BHU 1999] |
| A. | N-Pentane > iso-Pentane > neo-Pentane |
| B. | iso-Pentane > n-Pentane > neo-Pentane |
| C. | neo-Pentane > iso-Pentane > n-Pentane |
| D. | n-Pentane > neo-Pentane > iso-Pentane |
| Answer» B. iso-Pentane > n-Pentane > neo-Pentane | |
| 9079. |
Smallest among these species is [KCET 2002] |
| A. | Lithium ion |
| B. | Hydrogen |
| C. | Lithium |
| D. | Helium |
| Answer» B. Hydrogen | |
| 9080. |
The colloidal solution of gelatin is known [CPMT 1984] |
| A. | Solvent loving sol |
| B. | Reversible sol |
| C. | Hydrophilic colloids |
| D. | All of these |
| Answer» E. | |
| 9081. |
The bond that exists between \[N{{H}_{3}}\] and \[B{{F}_{3}}\]is called [AFMC 1982; MP PMT 1985; MNR 1994; KCET 2000; MP PET 2001; UPSEAT 2001] |
| A. | Electrovalent |
| B. | Covalent |
| C. | Coordinate |
| D. | Hydrogen |
| Answer» D. Hydrogen | |
| 9082. |
Which of the following pairs has the same bond angle |
| A. | Ethane and ethylene |
| B. | Ethylene and acetylene |
| C. | Ethylene and benzene |
| D. | Acetylene and benzene |
| Answer» D. Acetylene and benzene | |
| 9083. |
The IUPAC name of crotonaldehyde is [MP PMT 1999] |
| A. | Prop-2-ene-1-al |
| B. | Propenal |
| C. | But-2-ene-1-al |
| D. | Butenal |
| Answer» D. Butenal | |
| 9084. |
IUPAC name of the following compound will be \[C{{H}_{3}}-CH=\underset{C{{H}_{2}}-C{{H}_{2}}-C{{H}_{3}}}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{C-C{{H}_{2}}-C{{H}_{3}}\,\,\,\,\,}}\,}}\,\] [CPMT 1999, 2002; Pb. CET 2001] |
| A. | 3-ethyl-2-hexene |
| B. | 3-propyl-2-hexene |
| C. | 3-propyl-3-hexene |
| D. | 4-ethyl-4-hexene |
| Answer» B. 3-propyl-2-hexene | |
| 9085. |
Unit for radioactive constant is [MP PET 1990] |
| A. | \[Tim{{e}^{\text{-1}}}\] |
| B. | Time |
| C. | \[Mole-tim{{e}^{-1}}\] |
| D. | \[Time-mol{{e}^{-1}}\] |
| Answer» B. Time | |
| 9086. |
When benzoic acid dissolve in benzene, the observed molecular mass is |
| A. | 244 |
| B. | 61 |
| C. | 366 |
| D. | 122 |
| Answer» B. 61 | |
| 9087. |
An aqueous solution of ammonia consists of [MP PET 2001] |
| A. | \[{{H}^{+}}\] |
| B. | \[O{{H}^{-}}\] |
| C. | \[NH_{4}^{+}\] |
| D. | \[NH_{4}^{+}\] and \[O{{H}^{-}}\] |
| Answer» E. | |
| 9088. |
The impurities present in rain water possess ..... charge |
| A. | Positive |
| B. | Negative |
| C. | Zero |
| D. | Positive and negative |
| Answer» C. Zero | |
| 9089. |
\[N{{a}^{+}}\]ion is isoelectronic with [CPMT 1990] |
| A. | \[L{{i}^{+}}\] |
| B. | \[M{{g}^{+2}}\] |
| C. | \[C{{a}^{+2}}\] |
| D. | \[B{{a}^{+2}}\] |
| Answer» C. \[C{{a}^{+2}}\] | |
| 9090. |
Which one is known as barytes [CPMT 1987] |
| A. | \[BaS{{O}_{4}}\] |
| B. | \[BaC{{l}_{2}}.2{{H}_{2}}O\] |
| C. | \[BaO\] |
| D. | \[BaC{{O}_{3}}\] |
| Answer» B. \[BaC{{l}_{2}}.2{{H}_{2}}O\] | |
| 9091. |
Which of the following statement concerning lanthanides elements is false [CBSE PMT 1994] |
| A. | Lanthanides are separated from one another by ion exchange method |
| B. | Ionic radii of trivalent lanthanides steadily increases with increase in the atomic number |
| C. | All lanthanides are highly dense metals |
| D. | More characteristic oxidation state of lanthanide elements is +3 |
| Answer» C. All lanthanides are highly dense metals | |
| 9092. |
How many grams of caustic potash required to completely neutralise 12.6 gm \[HN{{O}_{3}}\] |
| A. | 22.4 KOH |
| B. | 1.01 KOH |
| C. | 6.02 KOH |
| D. | 11.2 KOH |
| Answer» E. | |
| 9093. |
The bond order of individual carbon-carbon bonds in benzene is [IIT-JEE 1981; MP PET 2000] |
| A. | One |
| B. | Two |
| C. | Between one and two |
| D. | One and two, alternately |
| Answer» D. One and two, alternately | |
| 9094. |
The chemical added to leaded petrol to prevent the deposition of lead in the combustion chamber is [Kerala (Med.) 2003] |
| A. | Iso-octane |
| B. | Ethylene dibromide |
| C. | Tetraethyl lead |
| D. | Mercaptan |
| E. | n-Heptane |
| Answer» C. Tetraethyl lead | |
| 9095. |
Cyclic hydrocarbon molecule A has all the carbon and hydrogens in a single plane. All the carbon-carbon bonds are of same length and less that 1.54 Å but more than 1.34 Å. \[C-C-C\] bond angle will be [CBSE PMT 1989] |
| A. | \[{{120}^{o}}\] |
| B. | \[{{180}^{o}}\] |
| C. | \[{{100}^{o}}\] |
| D. | \[{{109}^{o}}2{8}'\] |
| Answer» B. \[{{180}^{o}}\] | |
| 9096. |
IUPAC name of \[H-\underset{H}{\mathop{\underset{|}{\mathop{\overset{H}{\mathop{\overset{|}{\mathop{C}}\,}}\,}}\,}}\,-\underset{H}{\mathop{\underset{|}{\mathop{\overset{Cl}{\mathop{\overset{|}{\mathop{C}}\,}}\,}}\,}}\,-Cl\] is [CPMT 1973, 75, 85] |
| A. | 1, 2-dichloroethane |
| B. | 2, 2-dichloroethane |
| C. | 1, 1-dichloroethane |
| D. | Dichloroethane |
| Answer» D. Dichloroethane | |
| 9097. |
General formula of alkyne is [MNR 1983; CPMT 1975, 93; MP PET 1999] |
| A. | \[{{C}_{n}}{{H}_{2n+2}}\] |
| B. | \[{{C}_{n}}{{H}_{2n}}\] |
| C. | \[{{C}_{n}}{{H}_{2n-2}}\] |
| D. | \[{{C}_{n}}{{H}_{n}}\] |
| Answer» D. \[{{C}_{n}}{{H}_{n}}\] | |
| 9098. |
Freon-114 used in refrigerator and air conditioners is 1, 2-dichorotetrafluoroethane. Its structural formula is [CPMT 1979, 81; NCERT 1975] |
| A. | \[Cl-\underset{Cl}{\mathop{\underset{|}{\mathop{\overset{F}{\mathop{\overset{|}{\mathop{C}}\,}}\,}}\,}}\,-\underset{F}{\mathop{\underset{|}{\mathop{\overset{F}{\mathop{\overset{|}{\mathop{C}}\,}}\,}}\,}}\,-H\] |
| B. | \[F-\underset{Cl}{\mathop{\underset{|}{\mathop{\overset{H}{\mathop{\overset{|}{\mathop{C}}\,}}\,}}\,}}\,-\underset{Cl}{\mathop{\underset{|}{\mathop{\overset{F}{\mathop{\overset{|}{\mathop{C}}\,}}\,}}\,}}\,-F\] |
| C. | \[F-\underset{Cl}{\mathop{\underset{|}{\mathop{\overset{Cl}{\mathop{\overset{|}{\mathop{C}}\,}}\,}}\,}}\,-\underset{F}{\mathop{\underset{|}{\mathop{\overset{F}{\mathop{\overset{|}{\mathop{C}}\,}}\,}}\,}}\,-Cl\] |
| D. | \[F-\underset{Cl}{\mathop{\underset{|}{\mathop{\overset{F}{\mathop{\overset{|}{\mathop{C}}\,}}\,}}\,}}\,-\underset{H}{\mathop{\underset{|}{\mathop{\overset{Cl}{\mathop{\overset{|}{\mathop{C}}\,}}\,}}\,}}\,-\underset{F}{\mathop{\underset{|}{\mathop{\overset{F}{\mathop{\overset{|}{\mathop{C}}\,}}\,}}\,}}\,-F\] |
| Answer» D. \[F-\underset{Cl}{\mathop{\underset{|}{\mathop{\overset{F}{\mathop{\overset{|}{\mathop{C}}\,}}\,}}\,}}\,-\underset{H}{\mathop{\underset{|}{\mathop{\overset{Cl}{\mathop{\overset{|}{\mathop{C}}\,}}\,}}\,}}\,-\underset{F}{\mathop{\underset{|}{\mathop{\overset{F}{\mathop{\overset{|}{\mathop{C}}\,}}\,}}\,}}\,-F\] | |
| 9099. |
If the enthalpy of vaporization for water is 186.5 kJ \[mo{{l}^{-1}}\], the entropy of its vaporization will be [CPMT 1988; DCE 2000] |
| A. | \[0.5\,J{{K}^{-1}}mo{{l}^{-1}}\] |
| B. | \[1.0\,J{{K}^{-1}}mo{{l}^{-1}}\] |
| C. | \[1.5\,J{{K}^{-1}}mo{{l}^{-1}}\] |
| D. | \[2.0\,J{{K}^{-1}}mo{{l}^{-1}}\] |
| Answer» B. \[1.0\,J{{K}^{-1}}mo{{l}^{-1}}\] | |
| 9100. |
The spectrum of \[He\] is expected to be similar to [AIIMS 1980, 91; DPMT 1983; MP PMT 2002] |
| A. | \[H\] |
| B. | \[L{{i}^{+}}\] |
| C. | \[Na\] |
| D. | \[H{{e}^{+}}\] |
| Answer» C. \[Na\] | |