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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.
| 8001. |
The conjugate acid of a strong base is a [EAMCET 1979] |
| A. | Strong acid |
| B. | Weak acid |
| C. | Strong base |
| D. | Weak base |
| Answer» C. Strong base | |
| 8002. |
Detergent action of soap is due to |
| A. | Emulsification properties |
| B. | Hydrolysis |
| C. | Ionization |
| D. | High molecular weight |
| Answer» B. Hydrolysis | |
| 8003. |
An aqueous solution of ammonium carbonate is [MP PMT 1989] |
| A. | Weakly acidic |
| B. | Weakly basic |
| C. | Strongly acidic |
| D. | Neither acidic nor basic |
| Answer» C. Strongly acidic | |
| 8004. |
Aqueous solution of the following compound on electrolysis gives ethane [NCERT 1983; MP PET 1985; CPMT 1975, 79] |
| A. | Acetic acid |
| B. | Acetamide |
| C. | Potassium acetate |
| D. | Ethyl acetate |
| Answer» D. Ethyl acetate | |
| 8005. |
Which of the following order of reagent is chosen to prepare 1, 3-butadiene from \[{{C}_{2}}{{H}_{2}}\] [RPET 2000] |
| A. | \[CuCl/N{{H}_{4}}Cl\] and \[{{H}_{2}}/Pd(BaS{{O}_{4}})\] |
| B. | \[N{{H}_{4}}Cl/CuCl\] and \[{{H}_{2}}/Pd(BaS{{O}_{4}})\] |
| C. | \[{{H}_{2}}/Pd(BaS{{O}_{4}})\] and \[CuCl/N{{H}_{4}}Cl\] |
| D. | \[{{H}_{2}}/Pd(BaS{{O}_{4}})\] and \[N{{H}_{4}}Cl/CuCl\] |
| Answer» B. \[N{{H}_{4}}Cl/CuCl\] and \[{{H}_{2}}/Pd(BaS{{O}_{4}})\] | |
| 8006. |
Conjugate base of \[HBr\]is [MP PET/PMT 1988] |
| A. | \[{{H}_{2}}B{{r}^{+}}\] |
| B. | \[{{H}^{+}}\] |
| C. | \[B{{r}^{-}}\] |
| D. | \[B{{r}^{-}}\] |
| Answer» D. \[B{{r}^{-}}\] | |
| 8007. |
The modern atomic weight scale is based on [MP PMT 2002] |
| A. | \[{{C}^{12}}\] |
| B. | \[{{O}^{16}}\] |
| C. | \[{{H}^{1}}\] |
| D. | \[{{C}^{13}}\] |
| Answer» B. \[{{O}^{16}}\] | |
| 8008. |
The conjugate base of \[{{H}_{2}}PO_{4}^{-}\] is [AIEEE 2004] |
| A. | \[{{H}_{3}}P{{O}_{4}}\] |
| B. | \[{{P}_{2}}{{O}_{5}}\] |
| C. | \[PO_{4}^{3-}\] |
| D. | \[HPO_{4}^{2-}\] |
| Answer» E. | |
| 8009. |
A possible material for use in the nuclear reactors as a fuel is [DPMT 1986] |
| A. | Thorium |
| B. | Zirconium |
| C. | Beryllium |
| D. | Plutonium |
| Answer» E. | |
| 8010. |
Zinc oxide when treated with \[NaOH\] solution gives |
| A. | \[Zn{{(OH)}_{2}}\] |
| B. | \[ZnC{{l}_{2}}\] |
| C. | \[N{{a}_{2}}Zn{{O}_{2}}\] |
| D. | \[Zn{{(OH)}_{3}}\] |
| Answer» D. \[Zn{{(OH)}_{3}}\] | |
| 8011. |
Ethylene is converted to X on passing through a mixture of an acidified aqueous solution of palladium chloride and cupric chloride. Which of the following reagents readily take part in addition reaction with X [UPSEAT 2003] |
| A. | \[B{{r}_{2}}\] |
| B. | HBr |
| C. | HCl |
| D. | HCN |
| Answer» E. | |
| 8012. |
Which of the following is not a synthetic polymer [MP PET 1999] |
| A. | Polyethylene |
| B. | PVC |
| C. | Nylon |
| D. | Cellophane |
| Answer» E. | |
| 8013. |
At \[{{25}^{o}}C\], the highest osmotic pressure is exhibited by \[0.1M\] solution of [CBSE PMT 1994; AIIMS 2000] |
| A. | \[CaC{{l}_{2}}\] |
| B. | \[KCl\] |
| C. | Glucose |
| D. | Urea |
| Answer» B. \[KCl\] | |
| 8014. |
When alcoholic solution of ethylene dibromide is heated with granulated zinc, the compound formed is [CPMT 1990] |
| A. | Ethylene |
| B. | Ethyne |
| C. | Cyclobutane |
| D. | Butane |
| Answer» B. Ethyne | |
| 8015. |
The volume of a colloidal particle, \[{{V}_{C}}\] as compared to the volume of a solute particle in a true solution \[{{V}_{S}},\] could be [AIEEE 2005] |
| A. | \[\frac{{{V}_{C}}}{{{V}_{S}}}\tilde{}1\] |
| B. | \[\frac{{{V}_{C}}}{{{V}_{S}}}\tilde{}{{10}^{23}}\] |
| C. | \[\frac{{{V}_{C}}}{{{V}_{S}}}\tilde{}{{10}^{-3}}\] |
| D. | \[\frac{{{V}_{C}}}{{{V}_{S}}}\tilde{}{{10}^{3}}\] |
| Answer» E. | |
| 8016. |
Which of the following is a disaccharide [MH CET 2002] |
| A. | Glucose |
| B. | Ribulose |
| C. | Lactose |
| D. | Arabinose |
| Answer» D. Arabinose | |
| 8017. |
Attacking or reactive or electrophilic species in nitration of benzene is or In the nitration of benzene with concentrated \[HN{{O}_{3}}\text{ and }{{H}_{2}}S{{O}_{4}}\] the attack on ring is made by [CBSE PMT 1994; MP PET 1996, 2000; Pb. PMT 1998; BHU 2001; BVP 2004; DCE 2003] |
| A. | \[NO_{2}^{-}\] |
| B. | \[NO_{2}^{+}\] |
| C. | \[NO_{3}^{-}\] |
| D. | \[N{{O}_{2}}\] |
| Answer» C. \[NO_{3}^{-}\] | |
| 8018. |
The bond dissociation energy needed to form benzyl radical from toluene is ..... than the formation of the methyl radical from methane [IIT 1994] |
| A. | Less |
| B. | Much |
| C. | Equal |
| D. | None of the above |
| Answer» B. Much | |
| 8019. |
(i) Chlorobenzene and (ii) benzene hexachloride are obtained from benzene by the reaction of chlorine, in the presence of |
| A. | (i) Direct sunlight and (ii) anhydrous \[AlC{{l}_{3}}\] |
| B. | (i) Sodium hydroxide and (ii) sulphuric acid |
| C. | (i) Ultraviolet light and (ii) anhydrous \[FeC{{l}_{3}}\] |
| D. | (i) Anhydrous \[AlC{{l}_{3}}\] and (ii) direct sunlight |
| Answer» E. | |
| 8020. |
The correct name of ?sucrose' is |
| A. | \[\alpha -D-\text{glucopyranosyl}-\beta -D-\text{fructofuranoside}\] |
| B. | \[\beta -D-\text{glucopyranosyl}-\beta -D-\text{fructofuranoside}\] |
| C. | \[\alpha -D-\text{glucopyranosyl}-\alpha -D-\text{fructofuranoside}\] |
| D. | \[\beta -D-\text{glucopyranosyl}-\alpha -L-\text{fructofuranoside}\] |
| Answer» B. \[\beta -D-\text{glucopyranosyl}-\beta -D-\text{fructofuranoside}\] | |
| 8021. |
In the molecule \[CH\equiv C-CH=C{{H}_{2}}\], the hybridisation of \[C-C\] bond is [Orissa JEE 2005] |
| A. | \[s{{p}^{2}}-sp\] |
| B. | \[s{{p}^{3}}-s{{p}^{3}}\] |
| C. | \[s{{p}^{2}}-s{{p}^{2}}\] |
| D. | \[s{{p}^{3}}-sp\] |
| Answer» B. \[s{{p}^{3}}-s{{p}^{3}}\] | |
| 8022. |
Acidified solution of chromic acid on treatment with hydrogen peroxide yields [MP PET 1999; AFMC 2000] |
| A. | \[Cr{{O}_{3}}+{{H}_{2}}O+{{O}_{2}}\] |
| B. | \[C{{r}_{2}}{{O}_{3}}+{{H}_{2}}O+{{O}_{2}}\] |
| C. | \[Cr{{O}_{5}}+{{H}_{2}}O\] |
| D. | \[{{H}_{2}}C{{r}_{2}}{{O}_{7}}+{{H}_{2}}O+{{O}_{2}}\] |
| Answer» D. \[{{H}_{2}}C{{r}_{2}}{{O}_{7}}+{{H}_{2}}O+{{O}_{2}}\] | |
| 8023. |
Which of the following statements is true for a catalyst |
| A. | It increases the energy of the reactants |
| B. | It decreases the energy of the products |
| C. | It decreases the energy of the reactants |
| D. | It does not change the enthalpy of the reactants |
| Answer» E. | |
| 8024. |
The number of possible enantiomeric pairs that can be produced during monochlorination of 2-methylbutane is [IIT-JEE 1997] |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 1 |
| Answer» B. 3 | |
| 8025. |
The number of neutron in tritium is [CPMT 2003] |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 0 |
| Answer» C. 3 | |
| 8026. |
According to Arrhenius theory, the activation energy is |
| A. | The energy it should possess so that it can enter into an effective collision |
| B. | The energy which the molecule should possess in order to undergo reaction |
| C. | The energy it has to acquire further so that it can enter into a effective collision |
| D. | The energy gained by the molecules on colliding with another molecule |
| Answer» D. The energy gained by the molecules on colliding with another molecule | |
| 8027. |
The solubility of \[BaS{{O}_{4}}\] in water is \[2.33\times {{10}^{-3}}\,gm/litre.\] Its solubility product will be (molecular weight of \[BaS{{O}_{4}}=233)\] [AIIMS 1998] |
| A. | \[1\times {{10}^{-5}}\] |
| B. | \[1\times {{10}^{-10}}\] |
| C. | \[1\times {{10}^{-15}}\] |
| D. | \[1\times {{10}^{-20}}\] |
| Answer» C. \[1\times {{10}^{-15}}\] | |
| 8028. |
Zig-zag motion (eratic motion) of particles in colloid was observed by [CPMT 1985] |
| A. | Tyndall |
| B. | Zsigmondy |
| C. | Robert brown |
| D. | Thomas Graham |
| Answer» D. Thomas Graham | |
| 8029. |
Which one of the following compounds is found abundantly in nature [BHU 1983; Manipal MEE 1995; DCE 2004] |
| A. | Fructose |
| B. | Starch |
| C. | Glucose |
| D. | Cellulose |
| Answer» E. | |
| 8030. |
The position of some metals in the electrochemical series in decreasing electropositive character is given as \[Mg>Al>Zn>Cu>Ag.\] What will happen, if a copper spoon is used to stir a solution of aluminium nitrate [NCERT 1977] |
| A. | The spoon will get coated with \[Al\] |
| B. | An alloy of \[Cu\] and \[Al\] is formed |
| C. | The solution becomes blue |
| D. | There is no reaction |
| Answer» E. | |
| 8031. |
Raffinose is [Pb. PMT 2001] |
| A. | Trisaccharide |
| B. | Monosaccharide |
| C. | Disaccharide |
| D. | None of these |
| Answer» B. Monosaccharide | |
| 8032. |
Which pair of compound is expected to show similar colour in aqueous medium [IIT Screening 2005] |
| A. | \[FeC{{l}_{2}}\] and \[CuC{{l}_{2}}\] |
| B. | \[VOC{{l}_{2}}\,\text{and }CuC{{l}_{2}}\] |
| C. | \[VOC{{l}_{2}}\text{ and }FeC{{l}_{2}}\] |
| D. | \[FeC{{l}_{2}}\text{ and }MnC{{l}_{2}}\] |
| Answer» C. \[VOC{{l}_{2}}\text{ and }FeC{{l}_{2}}\] | |
| 8033. |
Which of the following is not true in Rutherford?s nuclear model of atom [Orissa JEE 2002] |
| A. | Protons and neutrons are present inside nucleus |
| B. | Volume of nucleus is very small as compared to volume of atom |
| C. | The number of protons and neutrons are always equal |
| D. | The number of electrons and protons are always equal |
| Answer» D. The number of electrons and protons are always equal | |
| 8034. |
An organometallic compound amongst the following is |
| A. | Ferrocene |
| B. | \[Ca{{C}_{2}}\] |
| C. | Tetraethyl lead (TEL) |
| D. | All of these |
| Answer» E. | |
| 8035. |
Ethylene-propylene rubber (EPR) is |
| A. | Unsaturated, stereoregular |
| B. | Saturated, stereoregular |
| C. | Atactic, unsaturated |
| D. | Syndiotactic, unsaturated |
| Answer» C. Atactic, unsaturated | |
| 8036. |
The number of atoms in the cyclic structure of D-fructose is [MP PMT 1997] |
| A. | 5 |
| B. | 6 |
| C. | 4 |
| D. | 7 |
| Answer» B. 6 | |
| 8037. |
Sodium ethoxide is a specific reagent for [CPMT 1985] |
| A. | Dehydration |
| B. | Dehydrogenation |
| C. | Dehydrohalogenation |
| D. | Dehalogenation |
| Answer» D. Dehalogenation | |
| 8038. |
Minimum concentration of electrolyte which can precipitate any sol is [BIT 1992] |
| A. | Peptization value |
| B. | Gold number |
| C. | Avogadro's number |
| D. | Flocculation value |
| Answer» E. | |
| 8039. |
The protection of steel by chrome plating is due to [MP PMT 2001] |
| A. | Cathodic protection |
| B. | Anodic protection |
| C. | Covering of steel surface |
| D. | Formation of alloy with iron |
| Answer» B. Anodic protection | |
| 8040. |
Loss of a beta particle is equivalent to [J & K 2005] |
| A. | Increase of one neutron only |
| B. | Decrease of one neutron only |
| C. | Both A and B |
| D. | None of these |
| Answer» C. Both A and B | |
| 8041. |
Which of the following lead oxides is ?Sindhur? [MP PET 2002] |
| A. | \[PbO\] |
| B. | \[Pb{{O}_{2}}\] |
| C. | \[P{{b}_{2}}{{O}_{3}}\] |
| D. | \[P{{b}_{3}}{{O}_{4}}\] |
| Answer» E. | |
| 8042. |
The concentration of KI and KCl in certain solution containing both is 0.001M each. If 20 ml of this solution is added to 20 ml of a saturated solution of AgI in water? What will happen [MP PMT 2004] |
| A. | AgCl will be precipitated |
| B. | AgI will be precipitated |
| C. | Both AgCl and AgI will be precipitated |
| D. | There will be no precipitated |
| Answer» C. Both AgCl and AgI will be precipitated | |
| 8043. |
The C-H bond distance is longest in [BHU 2001] |
| A. | \[{{C}_{2}}{{H}_{2}}\] |
| B. | \[{{C}_{2}}{{H}_{4}}\] |
| C. | \[{{C}_{2}}{{H}_{6}}\] |
| D. | \[{{C}_{6}}{{H}_{6}}\] |
| Answer» D. \[{{C}_{6}}{{H}_{6}}\] | |
| 8044. |
Rutherford?s a-particle scattering experiment proved that atom has [MP PMT 2001] |
| A. | Electrons |
| B. | Neutron |
| C. | Nucleus |
| D. | Orbitals |
| Answer» D. Orbitals | |
| 8045. |
Which of the following has highest knocking [UPSEAT 2004] |
| A. | Olefins |
| B. | Branched chain olefins |
| C. | Straight chain olefins |
| D. | Aromatic hydrocarbons |
| Answer» D. Aromatic hydrocarbons | |
| 8046. |
. Nesseler's reagent is [MP PET 1991; MP PMT 1993; AFMC 2001] |
| A. | \[{{K}_{2}}Hg{{I}_{4}}\] |
| B. | \[{{K}_{2}}Hg{{I}_{4}}+KOH\] |
| C. | \[{{K}_{2}}Hg{{I}_{2}}+KOH\] |
| D. | \[{{K}_{2}}Hg{{I}_{4}}+Hg\] |
| Answer» C. \[{{K}_{2}}Hg{{I}_{2}}+KOH\] | |
| 8047. |
If HCl is added over \[C{{H}_{2}}=C |
| A. | \[\underset{Cl\,\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,}{\mathop{C{{H}_{2}}}}\,}}\,=C<\begin{matrix} C{{H}_{3}} \\ C{{H}_{3}} \\ \end{matrix}\] |
| B. | \[\underset{\,\,\,}{\mathop{\underset{\,\,\,\,\,\,\,\,\,}{\mathop{C{{H}_{2}}}}\,}}\,-CH<-\begin{matrix} Cl \\ C{{H}_{3}} \\ C{{H}_{3}} \\ \end{matrix}\] |
| C. | \[\]\[\underset{\,\,\,}{\mathop{\underset{\,\,\,\,\,\,\,\,\,}{\mathop{C{{H}_{2}}}}\,}}\,=C<\begin{matrix} C{{H}_{3}} \\ C{{H}_{2}}Cl \\ \end{matrix}\] |
| D. | None of these |
| Answer» C. \[\]\[\underset{\,\,\,}{\mathop{\underset{\,\,\,\,\,\,\,\,\,}{\mathop{C{{H}_{2}}}}\,}}\,=C<\begin{matrix} C{{H}_{3}} \\ C{{H}_{2}}Cl \\ \end{matrix}\] | |
| 8048. |
Tyndall effect is more pronounced in |
| A. | Hydrophilic sols |
| B. | Hydrophobic sols |
| C. | Starch solution |
| D. | Both B and C |
| Answer» C. Starch solution | |
| 8049. |
The reaction of toluene with chlorine in presence of ferric chloride gives predominantly [IIT-JEE 1986; DCE 2000] |
| A. | Benzoyl chloride |
| B. | m-chlorotoluene |
| C. | Benzyl chloride |
| D. | o- and p-chlorotoluenes |
| Answer» E. | |
| 8050. |
Nitration of benzene is a [RPMT 1999] |
| A. | Electrophilic displacement |
| B. | Electrophilic addition |
| C. | Nucleophilic addition |
| D. | Nucleophilic displacement |
| Answer» B. Electrophilic addition | |