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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.
| 8901. |
Green vitriol is [DPMT 1985; BHU 1997; RPET 1999; JIPMER 2002] |
| A. | \[CuS{{O}_{4}}.5{{H}_{2}}O\] |
| B. | \[FeS{{O}_{4}}.7{{H}_{2}}O\] |
| C. | \[CaS{{O}_{4}}.2{{H}_{2}}O\] |
| D. | \[ZnS{{O}_{4}}.7{{H}_{2}}O\] |
| Answer» C. \[CaS{{O}_{4}}.2{{H}_{2}}O\] | |
| 8902. |
Which of the following statement is true for an electrochemical cell [Pb.CET 2002] |
| A. | \[{{H}_{2}}\]is cathode and \[Cu\]is anode |
| B. | \[{{H}_{2}}\] is anode and Cu is cathode |
| C. | Reduction occurs at \[{{H}_{2}}\]electrode |
| D. | Oxidation occurs at Cu electrode |
| Answer» C. Reduction occurs at \[{{H}_{2}}\]electrode | |
| 8903. |
The solubility of \[AgCl\] in \[0.2\,\,M\,\,NaCl\] solution \[({{K}_{sp}}\]for \[AgCl=1.20\times {{10}^{-10}})\] is [MP PET 1996] |
| A. | \[0.2\,\,M\] |
| B. | \[1.2\times {{10}^{-10}}\,M\] |
| C. | \[0.2\times {{10}^{-10}}\,M\] |
| D. | \[0.2\times {{10}^{-10}}\,M\] |
| Answer» E. | |
| 8904. |
A sugar, that is not a disaccharide, among the following is [KCET (Med./Engg.) 2002] |
| A. | Lactose |
| B. | Galactose |
| C. | Sucrose |
| D. | Maltose |
| Answer» C. Sucrose | |
| 8905. |
Chemisorption |
| A. | Involves the weak attractive interactions between adsorbent and adsorbate |
| B. | Is irreversible in nature |
| C. | Decreases with increase of temperature |
| D. | Involves multilayer formation of adsorbent on adsorbate |
| Answer» C. Decreases with increase of temperature | |
| 8906. |
Which one is used as a bye-product in Serpeck's process |
| A. | \[N{{H}_{3}}\] |
| B. | \[C{{O}_{2}}\] |
| C. | \[{{N}_{2}}\] |
| D. | \[P{{H}_{3}}\] |
| Answer» B. \[C{{O}_{2}}\] | |
| 8907. |
Which of the following is true for the reaction \[{{H}_{2}}O(l)\]⇌\[{{H}_{2}}O(g)\] at \[{{100}^{o}}C\] and 1 atmosphere [KCET 1991; AIIMS 1996] |
| A. | \[\Delta E=0\] |
| B. | \[\Delta H=0\] |
| C. | \[\Delta H=\Delta E\] |
| D. | \[\Delta H=T\Delta S\] |
| Answer» E. | |
| 8908. |
Colour of colloidal solution is due to [CPMT 1996] |
| A. | Different size of colloidal particles |
| B. | Due to formation of complex |
| C. | Due to formation of hydrated crystal |
| D. | None of these |
| Answer» B. Due to formation of complex | |
| 8909. |
Soft heavy metal melts at \[{{30}^{o}}C\] and is used in making heat sensitive thermometers the metal is [RPET 2000] |
| A. | Galium |
| B. | Sodium |
| C. | Potassium |
| D. | Caesium |
| Answer» B. Sodium | |
| 8910. |
Bohr model of atom is contradicted by [MP PMT 2002] |
| A. | Pauli?s exclusion principle |
| B. | Planck quantum theory |
| C. | Heisenberg uncertainty principle |
| D. | All of these |
| Answer» D. All of these | |
| 8911. |
When acetylene reacts with HCl in the presence of \[HgC{{l}_{2}}\], the product is [MNR 1985; MP PET 1996; UPSEAT 2000] |
| A. | Methyl chloride |
| B. | Dichloroethane |
| C. | Vinyl chloride |
| D. | Ethylidine chloride |
| Answer» D. Ethylidine chloride | |
| 8912. |
How much water should be added to 200 c.c of semi normal solution of \[NaOH\]to make it exactly deci normal [AFMC 1983] |
| A. | 200 cc |
| B. | 400 cc |
| C. | 800 cc |
| D. | 600 cc |
| Answer» D. 600 cc | |
| 8913. |
In the nuclear reactors the speed of the neutrons is slowed down by [CPMT 1983, 84] |
| A. | Heavy water |
| B. | Ordinary water |
| C. | Zinc rods |
| D. | Molten caustic soda |
| Answer» B. Ordinary water | |
| 8914. |
Given that \[C(g)+4H(g)\,\to \,C{{H}_{4}}(g);\,\Delta H=-166\,kJ\] The bond energy \[C-H\] will be [AMU 2002] |
| A. | 208 kJ/mole |
| B. | ? 41.6 kJ/mole |
| C. | 832 kJ/mole |
| D. | None of these |
| Answer» C. 832 kJ/mole | |
| 8915. |
Which of the following does not reduce Benedict's solution [KCET 2000] |
| A. | Sucrose |
| B. | Aldehyde |
| C. | Glucose |
| D. | Fructose |
| Answer» B. Aldehyde | |
| 8916. |
In infinite dilutions, the equivalent conductances of \[B{{a}^{2+}}\] and \[C{{l}^{-}}\] are 127 and 76 \[oh{{m}^{-1}}c{{m}^{-1}}\] \[eqv{{t}^{-1}}\]. The equivalent conductivity of \[BaC{{l}_{2}}\]at indefinite dilution is [CBSE 2000] |
| A. | 101.5 |
| B. | 139.5 |
| C. | 203.5 |
| D. | 279.5 |
| Answer» C. 203.5 | |
| 8917. |
Boron has two stable isotopes, \[^{10}B\](19%) and \[^{11}B\](81%). The atomic mass that should appear for boron in the periodic table is [CBSE PMT 1990] |
| A. | 10.8 |
| B. | 10.2 |
| C. | 11.2 |
| D. | 10.0 |
| Answer» B. 10.2 | |
| 8918. |
Which of the following carbohydrates is a disaccharide |
| A. | Glucose |
| B. | Fructose |
| C. | Raffinose |
| D. | Maltose |
| Answer» E. | |
| 8919. |
The coordination number of \[Pt\] in \[{{\left[ Pt{{\left( N{{H}_{3}} \right)}_{4}}C{{l}_{2}} \right]}^{++}}\] ion is [MP PET 1995] |
| A. | 2 |
| B. | 4 |
| C. | 6 |
| D. | 8 |
| Answer» D. 8 | |
| 8920. |
Bleaching powder is obtained by the interaction of chlorine and [CPMT 1972, 78, 89; 2002; DPMT 1983] |
| A. | Conc. solution of \[Ca{{(OH)}_{2}}\] |
| B. | Dilute solution of \[Ca{{(OH)}_{2}}\] |
| C. | Dry calcium oxide |
| D. | Dry slaked lime |
| Answer» E. | |
| 8921. |
Which of the following processes is reversible |
| A. | Halogenation |
| B. | Sulphonation |
| C. | Nitration |
| D. | None |
| Answer» C. Nitration | |
| 8922. |
The predominant product formed, when 3-methyl-2-pentene reacts with HOCl, is [IIT-JEE 1995] |
| A. | \[\underset{\,\,\,\,\,\,\,C{{H}_{3}}}{\mathop{\underset{\,\,|}{\mathop{\overset{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,Cl\,\,\,OH}{\mathop{\overset{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,|}{\mathop{C{{H}_{3}}-C{{H}_{2}}-C-CH-C{{H}_{3}}}}\,}}\,}}\,}}\,\] |
| B. | \[\underset{\,\,\,\,\,\,\,C{{H}_{3}}}{\mathop{\underset{\,\,|}{\mathop{\overset{\,\,\,\,\,\,\,\,\,\,\,\,\,\,Cl\,\,\,Cl}{\mathop{\overset{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,|}{\mathop{C{{H}_{3}}-C{{H}_{2}}-C-CH-C{{H}_{3}}}}\,}}\,}}\,}}\,\] |
| C. | \[\underset{\,\,\,\,\,\,\,\,\,\,C{{H}_{3}}\,Cl}{\mathop{\underset{\,\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,|}{\mathop{\overset{\,\,\,\,\,\,\,\,OH}{\mathop{\overset{\,\,\,\,|}{\mathop{C{{H}_{3}}-C{{H}_{2}}-C-CH-C{{H}_{3}}}}\,}}\,}}\,}}\,\] |
| D. | \[\underset{C{{H}_{3}}\,\,\,\,\,\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\overset{\,\,C{{H}_{3}}\,OH}{\mathop{\overset{\,|\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,}{\mathop{C{{H}_{3}}-C-CH-C{{H}_{3}}}}\,}}\,}}\,}}\,\] |
| Answer» D. \[\underset{C{{H}_{3}}\,\,\,\,\,\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\overset{\,\,C{{H}_{3}}\,OH}{\mathop{\overset{\,|\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,}{\mathop{C{{H}_{3}}-C-CH-C{{H}_{3}}}}\,}}\,}}\,}}\,\] | |
| 8923. |
Which of the following does not react with \[AgCl\] [AIIMS 1997] |
| A. | \[NaN{{O}_{3}}\] |
| B. | \[N{{a}_{2}}C{{O}_{3}}\] |
| C. | \[N{{a}_{2}}{{S}_{2}}{{O}_{3}}\] |
| D. | \[N{{H}_{4}}OH\] |
| Answer» B. \[N{{a}_{2}}C{{O}_{3}}\] | |
| 8924. |
\[C{{H}_{3}}-CH=C{{H}_{2}}+HBr\xrightarrow{{}}...........,\] the product formed is [AIIMS 1983; CPMT 1997; RPMT 1999, 2003] |
| A. | \[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-Br\] |
| B. | \[C{{H}_{3}}-CHBr-C{{H}_{3}}\] |
| C. | \[BrC{{H}_{2}}-CH=C{{H}_{2}}\] |
| D. | \[C{{H}_{2}}=C=C{{H}_{2}}\] |
| Answer» C. \[BrC{{H}_{2}}-CH=C{{H}_{2}}\] | |
| 8925. |
Increasing order of atomic radii is [RPET 2003] |
| A. | \[M{{g}^{2+}}<N{{a}^{+}}<Ne<{{F}^{-}}<{{O}^{2-}}\] |
| B. | \[N{{a}^{+}}<M{{g}^{++}}<Ne<{{F}^{-}}<{{O}^{2-}}\] |
| C. | \[{{O}^{2-}}<{{F}^{-}}<Ne<N{{a}^{+}}<M{{g}^{2+}}\] |
| D. | \[Ne<{{O}^{2-}}<{{F}^{-}}<N{{a}^{+}}<M{{g}^{2+}}\] |
| Answer» B. \[N{{a}^{+}}<M{{g}^{++}}<Ne<{{F}^{-}}<{{O}^{2-}}\] | |
| 8926. |
A trend common to both groups I and VII elements in the periodic table as atomic number increases is [NCERT 1981; EAMCET 1980] |
| A. | Oxidising power increases |
| B. | Atomic radius increases |
| C. | Maximum valency increases |
| D. | Reactivity with water increases |
| Answer» C. Maximum valency increases | |
| 8927. |
1.24 gm P is present in 2.2 gm |
| A. | \[{{P}_{4}}{{S}_{3}}\] |
| B. | \[{{P}_{2}}{{S}_{2}}\] |
| C. | \[P{{S}_{2}}\] |
| D. | \[{{P}_{2}}{{S}_{4}}\] |
| Answer» B. \[{{P}_{2}}{{S}_{2}}\] | |
| 8928. |
The aqueous solution of \[CuS{{O}_{4}}\] is [CPMT 1985] |
| A. | Acidic |
| B. | Basic |
| C. | Neutral |
| D. | Amphoteric |
| Answer» B. Basic | |
| 8929. |
When ferric oxide reacts with NaOH, the product formed is [Pb. CET 2002] |
| A. | NaF |
| B. | \[FeC{{l}_{3}}\] |
| C. | \[Fe{{(OH)}_{3}}\] |
| D. | \[NaFe{{O}_{2}}\] |
| Answer» D. \[NaFe{{O}_{2}}\] | |
| 8930. |
When dispersion medium is water, the colloidal system is called [MP PMT 1986] |
| A. | Sol |
| B. | Aerosol |
| C. | Organosol |
| D. | Aquasol |
| Answer» E. | |
| 8931. |
In which of the following conditions a chemical reaction can not occur [AMU 1999] |
| A. | \[\Delta H\] and\[\Delta S\] increase and \[T\Delta S>\Delta H\] |
| B. | \[\Delta H\] and \[\Delta S\] decrease and \[\Delta H>T\Delta S\] |
| C. | \[\Delta H\] increases and \[\Delta S\] decreases |
| D. | \[\Delta H\] decreases and \[\Delta S\] increases |
| Answer» D. \[\Delta H\] decreases and \[\Delta S\] increases | |
| 8932. |
Which of the following is most acidic [BHU 1998] |
| A. | \[N{{a}_{2}}O\] |
| B. | \[MgO\] |
| C. | \[A{{l}_{2}}{{O}_{3}}\] |
| D. | \[CaO\] |
| Answer» D. \[CaO\] | |
| 8933. |
When 2-bromobutane reacts with alcoholic KOH, the reaction is called [KCET (Med.) 2001] |
| A. | Halogenation |
| B. | Hydrogenation |
| C. | Chlorination |
| D. | Dehydro-halogenation |
| Answer» E. | |
| 8934. |
Steel becomes soft and pliable by [MP PET 1989] |
| A. | Annealing |
| B. | Nitriding |
| C. | Tempering |
| D. | Case hardening |
| Answer» B. Nitriding | |
| 8935. |
What is the packing fraction of \[_{26}^{56}Fe\] (Isotopic mass = 55.92066) [JIPMER 2002] |
| A. | \[-14.167\] |
| B. | \[173.90\] |
| C. | \[-14.187\] |
| D. | \[-73.90\] |
| Answer» B. \[173.90\] | |
| 8936. |
What is the role of a catalyst in a catalysed reaction [MP PMT 1996; Pb. PMT 2000;UPSEAT 2001,02] |
| A. | Lowers the activation energy |
| B. | Increases the activation energy |
| C. | Affects the free energy change |
| D. | Affects the enthalpy change |
| Answer» B. Increases the activation energy | |
| 8937. |
A graph plotted between log K vs 1/T for calculating activation energy is shown by [MP PET 2002] |
| A. | |
| B. | |
| C. | |
| D. | |
| Answer» C. | |
| 8938. |
sThe major product formed when propene reacts with HBr in presence of peroxides is [NCERT 1980; CBSE PMT 1989] |
| A. | n-propyl bromide |
| B. | Isopropyl bromide |
| C. | n-propyl alcohol |
| D. | 1, 3-dibromopropane |
| Answer» B. Isopropyl bromide | |
| 8939. |
Octane number has 0 value for [Roorkee 1989; MP PET 1999, 2002; MP PMT 2001; KCET 2002] |
| A. | iso-octane |
| B. | n-hexane |
| C. | n-heptane |
| D. | iso-heptane |
| Answer» D. iso-heptane | |
| 8940. |
The solution of sulphuric acid contains 80% by weight \[{{H}_{2}}S{{O}_{4}}\]. Specific gravity of this solution is 1.71. Its normality is about [CBSE 1991] |
| A. | 18.0 |
| B. | 27.9 |
| C. | 1.0 |
| D. | 10.0 |
| Answer» C. 1.0 | |
| 8941. |
If the solubility product \[{{K}_{sp}}\] of a sparingly soluble salt \[M{{X}_{2}}\] at \[25{}^\circ C\] is \[1.0\times {{10}^{-11}}\], the solubility of the salt in mole litre?1 at this temperature will be [RPMT 2000] |
| A. | \[2.46\times {{10}^{14}}\] |
| B. | \[1.36\times {{10}^{-4}}\] |
| C. | \[2.60\times {{10}^{-7}}\] |
| D. | \[1.20\times {{10}^{-10}}\] |
| Answer» C. \[2.60\times {{10}^{-7}}\] | |
| 8942. |
In the following reaction the catalyst used is [AMU (Engg.) 1999] |
| A. | \[A{{l}_{2}}{{O}_{3}}\] |
| B. | \[C{{r}_{2}}{{O}_{3}}\] |
| C. | \[C{{r}_{2}}{{O}_{3}}\] and \[A{{l}_{2}}{{O}_{3}}\] |
| D. | Zn dust |
| Answer» D. Zn dust | |
| 8943. |
Generally, a group of atoms can function as a ligand if [MP PET 1996] |
| A. | They are positively charged ions |
| B. | They are free radicals |
| C. | They are either neutral molecules or negatively charged ions |
| D. | None of these |
| Answer» D. None of these | |
| 8944. |
A white substance was alkaline in solution. Which of the following substances could it be [CPMT 1989] |
| A. | \[F{{e}_{2}}{{O}_{3}}\] |
| B. | \[N{{a}_{2}}C{{O}_{3}}\] |
| C. | \[N{{H}_{4}}Cl\] |
| D. | \[NaN{{O}_{3}}\] |
| Answer» C. \[N{{H}_{4}}Cl\] | |
| 8945. |
Which of the following is the best protective colloid [UPSEAT 2004] |
| A. | Gelatin (Gold No. = 0.005) |
| B. | Gum arabic (Gold No. = 0.15) |
| C. | Egg albumin (Gold No. = 0.08) |
| D. | None of these |
| Answer» B. Gum arabic (Gold No. = 0.15) | |
| 8946. |
Which of the following properties is not true for an alkali metal [Pune CET 1998] |
| A. | Low atomic volume |
| B. | Low ionization energy |
| C. | Low density |
| D. | Low electronegativity |
| Answer» B. Low ionization energy | |
| 8947. |
Energy required to dissociate 4 gm of gaseous hydrogen into free gaseous atoms is 208 kcal at \[{{25}^{o}}C\]. The bond energy of \[H-H\] bond will be [CPMT 1989; MP PET 2000; J & K 2005] |
| A. | 104 kcal |
| B. | 10.4 kcal |
| C. | 1040 kcal |
| D. | 104 cal |
| Answer» B. 10.4 kcal | |
| 8948. |
Which of the following polymer has ester linkage [BVP 2004] |
| A. | Nylon-66 |
| B. | PVC |
| C. | Terylene |
| D. | SBR |
| Answer» D. SBR | |
| 8949. |
Which one of the following is the reagent used to identify glucose [MP PMT 1993] |
| A. | Neutral ferric chloride |
| B. | Chloroform and alcoholic KOH |
| C. | Ammoniacal silver nitrate |
| D. | Sodium ethoxide |
| Answer» D. Sodium ethoxide | |
| 8950. |
Which of the following does not give white precipitate with ammoniacal \[AgN{{O}_{3}}\] |
| A. | \[CH\equiv CH\] |
| B. | \[C{{H}_{3}}-C\equiv CH\] |
| C. | \[C{{H}_{3}}-C\equiv C-C{{H}_{3}}\] |
| D. | \[\underset{Cl\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{C{{H}_{2}}-C\equiv CH}}\,}}\,\] |
| Answer» D. \[\underset{Cl\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{C{{H}_{2}}-C\equiv CH}}\,}}\,\] | |