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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.
| 9001. |
Which of the following alkali metals has the biggest tendency for the half reaction, \[C{{O}_{2}}\] [DPMT 2001] |
| A. | Lithium |
| B. | Sodium |
| C. | Cesium |
| D. | Potassium |
| Answer» B. Sodium | |
| 9002. |
The value of n in the formula \[{{({{C}_{5}}{{H}_{10}}{{O}_{5}})}_{n}}\] for inulin is about |
| A. | 30 |
| B. | 300 |
| C. | 3000 |
| D. | 300000 |
| Answer» B. 300 | |
| 9003. |
When sodium bicarbonate is heated the product obtained is [Pb. CET 2000; DCE 2004] |
| A. | Na |
| B. | \[N{{a}_{2}}C{{O}_{3}}\] |
| C. | \[NaC{{O}_{3}}\] |
| D. | \[N{{a}_{2}}(HC{{O}_{3}})\] |
| Answer» C. \[NaC{{O}_{3}}\] | |
| 9004. |
Which of the following is formed when n-butyl lithium reacts with tin (II) chloride [AFMC 2001] |
| A. | \[LiBr\] |
| B. | \[E{{t}_{4}}Pb\] |
| C. | \[{{({{C}_{4}}{{H}_{9}})}_{4}}Sn\] |
| D. | \[{{({{C}_{2}}{{H}_{5}})}_{4}}Pb\] |
| Answer» D. \[{{({{C}_{2}}{{H}_{5}})}_{4}}Pb\] | |
| 9005. |
Which of the following metal gives hydrogen gas, when heated with hot concentrated alkali [Pb. CET 2002] |
| A. | Cu |
| B. | Ag |
| C. | Zn |
| D. | Ni |
| Answer» D. Ni | |
| 9006. |
The addition of metals like \[Cr,\,Mn,\,W\] and \[Ni\] to ordinary steel makes it |
| A. | More useful |
| B. | Alters the properties of ordinary steel |
| C. | Both a and b |
| D. | None of these |
| Answer» D. None of these | |
| 9007. |
Liquid sodium finds use in nuclear reactors. Its function is |
| A. | To collect the reaction products |
| B. | To act as a heat exchanger or coolant |
| C. | To absorb the neutrons in order to control the chain reaction |
| D. | To act as a moderator which slows down the neutrons |
| Answer» C. To absorb the neutrons in order to control the chain reaction | |
| 9008. |
Van't Hoff factor \[i\] |
| A. | \[=\frac{\text{Normal molecular mass}}{\text{Observed molecular mass}}\] |
| B. | \[=\frac{\text{Observed molecular mass}}{\text{Normal molecular mass}}\] |
| C. | Less than one in case of dissociation |
| D. | More than one in case of association |
| Answer» B. \[=\frac{\text{Observed molecular mass}}{\text{Normal molecular mass}}\] | |
| 9009. |
Which one is a disaccharide [CPMT 1981, 83] |
| A. | Glucose |
| B. | Fructose |
| C. | Xylose |
| D. | Sucrose |
| Answer» E. | |
| 9010. |
\[C{{H}_{3}}MgI\] is an organometallic compound due to [DCE 2002] |
| A. | \[Mg-I\text{ bond}\] |
| B. | \[C-I\text{ bond}\] |
| C. | \[C-Mg\text{ bond}\] |
| D. | \[C-H\text{ bond}\] |
| Answer» D. \[C-H\text{ bond}\] | |
| 9011. |
In the reaction \[{{I}_{2}}+{{I}^{-}}\to \,{{I}_{3}}^{-},\] the Lewis base is [CPMT 1997; RPMT 2002; BCECE 2005] |
| A. | \[{{I}_{2}}\] |
| B. | \[{{I}^{-}}\] |
| C. | \[{{I}_{3}}^{-}\] |
| D. | None of these |
| Answer» C. \[{{I}_{3}}^{-}\] | |
| 9012. |
What is not true about polymers [MP PET 1999] |
| A. | Polymers do not carry any charge |
| B. | Polymers have high viscosity |
| C. | Polymers scatter light |
| D. | Polymers have low molecular weight |
| Answer» E. | |
| 9013. |
The electrolytic conductance is a direct measure of [KCET 1990; CPMT 2003] |
| A. | Resistance |
| B. | Potential |
| C. | Concentration |
| D. | Dissociation |
| Answer» E. | |
| 9014. |
Addition of HI on the double bond of propene yields isopropyl iodide and not n-propyl iodide as the major product. This is because the addition proceeds through [CPMT 1988] |
| A. | A more stable carbonium ion |
| B. | A more stable carbanion |
| C. | A more stable free radical |
| D. | None of the above being a concerted reaction |
| Answer» B. A more stable carbanion | |
| 9015. |
Number of s bonds in [CPMT 1994] |
| A. | 6 |
| B. | 15 |
| C. | 10 |
| D. | 12 |
| Answer» C. 10 | |
| 9016. |
Park's process is used in the extraction of [BHU 1977; CBSE PMT 1992; MP PMT 1996; Kurukshetra CEE 1998] |
| A. | Iron |
| B. | Zinc |
| C. | Silver |
| D. | Lead |
| Answer» D. Lead | |
| 9017. |
The name of the product obtained by the addition of HI to propene in presence of peroxide catalyst is [KCET 2000] |
| A. | Isopropyl iodide |
| B. | 2-Iodopropene |
| C. | 2-Iodopropane |
| D. | 1-Iodopropane |
| Answer» E. | |
| 9018. |
Which of the following represents the most oxidized form of hydrocarbon [MP PMT/PET 1988] |
| A. | \[C{{O}_{2}}\] |
| B. | \[RCHO\] |
| C. | \[RCOOH\] |
| D. | RCOOOH |
| Answer» B. \[RCHO\] | |
| 9019. |
A cleared solution which is again converted into colloidal solution, the process is called [DPMT 1996] |
| A. | Peptisation |
| B. | Electrolytic addition |
| C. | Electrophoresis |
| D. | None of these |
| Answer» E. | |
| 9020. |
Amongst \[TiF_{6}^{2-},CoF_{6}^{3-},C{{u}_{2}}C{{l}_{2}}\] and \[NiCl_{4}^{2-}\] (Atomic number \[Ti=22,\] \[Co=27,\] \[Cu=29,\] \[Ni=28\]). The colourless species are [CBSE PMT 1995] |
| A. | \[CoF_{6}^{3-}\] and \[NiCl_{4}^{2-}\] |
| B. | \[TiF_{6}^{2-}\] and \[CoF_{6}^{3-}\] |
| C. | \[C{{u}_{2}}C{{l}_{2}}\] and \[NiCl_{4}^{2-}\] |
| D. | \[TiF_{6}^{2-}\] and \[C{{u}_{2}}C{{l}_{2}}\] |
| Answer» E. | |
| 9021. |
The factor which is not affecting the conductivity of any solution is |
| A. | Dilution |
| B. | Nature of electrolyte |
| C. | Temperature |
| D. | None of these |
| Answer» E. | |
| 9022. |
Which one of the following is most basic [CPMT 1977, 83] |
| A. | \[A{{l}_{2}}{{O}_{3}}\] |
| B. | \[MgO\] |
| C. | \[Si{{O}_{2}}\] |
| D. | \[{{P}_{2}}{{O}_{5}}\] |
| Answer» C. \[Si{{O}_{2}}\] | |
| 9023. |
Crystals of which pair are isomorphous [CPMT 1990] |
| A. | \[ZnS{{O}_{4}},\] \[SnS{{O}_{4}}\] |
| B. | \[MgS{{O}_{4}},\] \[CaS{{O}_{4}}\] |
| C. | \[ZnS{{O}_{4}},\] \[MgS{{O}_{4}}\] |
| D. | \[PbS{{O}_{4}},\] \[NiS{{O}_{4}}\] |
| Answer» D. \[PbS{{O}_{4}},\] \[NiS{{O}_{4}}\] | |
| 9024. |
Benzene is prepared in laboratory from which one of the following compounds [MP PMT 1996] |
| A. | \[{{C}_{6}}{{N}_{5}}{{N}_{2}}Cl\] |
| B. | \[{{C}_{6}}{{H}_{5}}OH\] |
| C. | \[{{C}_{6}}{{H}_{5}}COONa\] |
| D. | \[{{C}_{6}}{{H}_{5}}S{{O}_{3}}H\] |
| Answer» D. \[{{C}_{6}}{{H}_{5}}S{{O}_{3}}H\] | |
| 9025. |
Acetylene gives [CPMT 1985] |
| A. | White precipitate with \[AgN{{O}_{3}}\] and red precipitate with \[C{{u}_{2}}C{{l}_{2}}\] |
| B. | White precipitate with \[C{{u}_{2}}C{{l}_{2}}\] and red precipitate with \[AgN{{O}_{3}}\] |
| C. | White precipitate with both the reagents |
| D. | Red precipitate with both the reagents |
| Answer» B. White precipitate with \[C{{u}_{2}}C{{l}_{2}}\] and red precipitate with \[AgN{{O}_{3}}\] | |
| 9026. |
To become a carbohydrate a compound must contain at least [AFMC 1991] |
| A. | 2 carbons |
| B. | 3 carbons |
| C. | 4 carbons |
| D. | 6 carbons |
| Answer» C. 4 carbons | |
| 9027. |
In the reaction \[{{B}_{2}}{{O}_{3}}+C+C{{l}_{2}}\to A+CO.\] The A is [Pb. PMT 2000] |
| A. | \[BC{{l}_{3}}\] |
| B. | \[BC{{l}_{2}}\] |
| C. | \[{{B}_{2}}C{{l}_{2}}\] |
| D. | \[CC{{l}_{2}}\] |
| Answer» B. \[BC{{l}_{2}}\] | |
| 9028. |
Noble gases are adsorbed by [DCE 2004] |
| A. | Anhydrous calcium chloride |
| B. | Ferric hydroxide |
| C. | Conc. \[{{H}_{2}}S{{O}_{4}}\] |
| D. | Activated coconut charcoal |
| Answer» E. | |
| 9029. |
When amylases catalyse the hydrolysis of starch, the final product obtained is chiefly [Pb. PMT 1998] |
| A. | Cellobiose |
| B. | Glucose |
| C. | Maltose |
| D. | Sucrose |
| Answer» D. Sucrose | |
| 9030. |
Which one of the following aqueous solutions will exhibit highest boiling point [AIEEE 2004] |
| A. | 0.015 M urea |
| B. | \[0.01\,M\,KN{{O}_{3}}\] |
| C. | \[0.01\,M\,N{{a}_{2}}S{{O}_{4}}\] |
| D. | \[0.015\,M\,\]Glucose |
| Answer» D. \[0.015\,M\,\]Glucose | |
| 9031. |
Which is not soluble in water [CPMT 1994] |
| A. | \[CaC{{O}_{3}}\] |
| B. | \[BaC{{O}_{3}}\] |
| C. | \[SrC{{O}_{3}}\] |
| D. | All of these |
| Answer» E. | |
| 9032. |
Plaster of paris hardens by [CPMT 1994] |
| A. | Giving off \[C{{O}_{2}}\] |
| B. | Changing into \[CaC{{O}_{3}}\] |
| C. | Uniting with water |
| D. | Giving out water |
| Answer» D. Giving out water | |
| 9033. |
Equivalent weight of \[KMn{{O}_{4}}\] acting as an oxidant in acidic medium is equal to [CPMT 1990; MP PMT 1999] |
| A. | Molecular weight of \[KMn{{O}_{4}}\] |
| B. | \[\frac{1}{2}\]´ Molecular weight of \[KMn{{O}_{4}}\] |
| C. | \[\frac{1}{3}\]´ Molecular weight of \[KMn{{O}_{4}}\] |
| D. | \[\frac{1}{5}\]´ Molecular weight of \[KMn{{O}_{4}}\] |
| Answer» E. | |
| 9034. |
Nylon ? 66 is [RPMT 2003] |
| A. | \[{{\left( -\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-{{(C{{H}_{2}})}_{4}}-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-NH-{{(C{{H}_{2}})}_{6}}-NH- \right)}_{n}}\] |
| B. | \[\left( -NH-{{(C{{H}_{2}})}_{5}}-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,- \right)\] |
| C. | \[{{\left( \underset{\,\,\,\,\,\,\,\,\,\,COOMe}{\overset{\,\,\,\,C{{H}_{3}}}{\mathop{C{{H}_{2}}-\underset{|}{\overset{|}{\mathop{C}}}\,-\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}}}\, \right)}_{n}}\] |
| D. | \[{{\left[ -\begin{array}{*{35}{l}} F \\ \underset{|}{\overset{|}{\mathop{C}}}\,\,- \\ F \\ \end{array}\begin{array}{*{35}{l}} F \\ \underset{|}{\overset{|}{\mathop{C}}}\,\,- \\ F \\ \end{array} \right]}_{n}}\] |
| Answer» B. \[\left( -NH-{{(C{{H}_{2}})}_{5}}-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,- \right)\] | |
| 9035. |
Which of the following property is not expected to be shown by copper [MP PET/PMT 1988; NCERT 1975; MP PET 1989] |
| A. | High thermal conductivity |
| B. | Low electrical conductivity |
| C. | Ductility |
| D. | Malleability |
| Answer» C. Ductility | |
| 9036. |
The compound containing co-ordinate bond is [AFMC 1999; Pb. CET 2002] |
| A. | \[{{O}_{3}}\] |
| B. | \[S{{O}_{3}}\] |
| C. | \[{{H}_{2}}S{{O}_{4}}\] |
| D. | All of these |
| Answer» E. | |
| 9037. |
Which of the following is an example of condensation polymers [MP PMT 1995; BHU 2000; UPSEAT 2004] |
| A. | Polythene |
| B. | PVC |
| C. | Orlon |
| D. | Terylene |
| Answer» E. | |
| 9038. |
IUPAC name of \[C{{H}_{3}}-C{{H}_{2}}-\underset{C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{CH-N{{H}_{2}}}}\,}}\,\] is [CPMT 1983, 84] |
| A. | 1-methyl-1-aminopropane |
| B. | 2-aminobutane |
| C. | 2-methyl-3-aminopropane |
| D. | None of the above |
| Answer» C. 2-methyl-3-aminopropane | |
| 9039. |
The solubility of silver bromide in hypo solution due to the formation of [Pb. CET 2003; CPMT 1987] |
| A. | \[{{[Ag({{S}_{2}}{{O}_{3}})]}^{-3}}\] |
| B. | \[A{{g}_{2}}S{{O}_{3}}\] |
| C. | \[{{[Ag({{S}_{2}}{{O}_{3}})]}^{-}}\] |
| D. | \[A{{g}_{2}}{{S}_{2}}{{O}_{3}}\] |
| Answer» B. \[A{{g}_{2}}S{{O}_{3}}\] | |
| 9040. |
Which of the following is not formed by the reaction of \[C{{l}_{2}}\] on \[C{{H}_{4}}\] in sunlight [AIIMS 1987] |
| A. | \[CHC{{l}_{3}}\] |
| B. | \[C{{H}_{3}}Cl\] |
| C. | \[C{{H}_{3}}C{{H}_{3}}\] |
| D. | \[C{{H}_{3}}C{{H}_{2}}C{{H}_{3}}\] |
| Answer» E. | |
| 9041. |
Sucrose on hydrolysis gives [MP PMT 1993; Bihar MEE 1997] |
| A. | Two molecules of glucose |
| B. | Two molecules of fructose |
| C. | One molecule each of glucose and fructose |
| D. | One molecule each of glucose and mannose |
| Answer» D. One molecule each of glucose and mannose | |
| 9042. |
On complete hydrolysis of starch, we finally get [MNR 1982; DPMT 1979; CBSE PMT 1991; MP PMT 1987; MP PET 1993] |
| A. | Glucose |
| B. | Fructose |
| C. | Glucose and fructose |
| D. | Sucrose |
| Answer» B. Fructose | |
| 9043. |
A compound \[{{C}_{5}}{{H}_{8}}\] which give white ppt. with ammonical \[AgN{{O}_{3}}\]. A give \[{{(C{{H}_{3}})}_{2}}CHCOOH\] with hot alcoholic KOH then compound is [RPMT 2002] |
| A. | \[C{{H}_{3}}C{{H}_{2}}-C{{H}_{2}}-CH=C{{H}_{2}}\] |
| B. | \[C{{H}_{3}}-C{{H}_{2}}-C\equiv CH\] |
| C. | \[{{(C{{H}_{3}})}_{2}}CH-C\equiv CH\] |
| D. | \[C{{H}_{2}}=CH-C{{H}_{2}}-CH=C{{H}_{2}}\] |
| Answer» D. \[C{{H}_{2}}=CH-C{{H}_{2}}-CH=C{{H}_{2}}\] | |
| 9044. |
The unit of ionic product of water \[{{K}_{w}}\] are [UPSEAT 2001, 02] |
| A. | \[Mo{{l}^{-1}}{{L}^{-1}}\] |
| B. | \[Mo{{l}^{-2}}{{L}^{-2}}\] |
| C. | \[Mo{{l}^{-2}}{{L}^{-1}}\] |
| D. | \[Mo{{l}^{2}}{{L}^{-2}}\] |
| Answer» E. | |
| 9045. |
In the reaction \[{{I}_{2}}+2{{S}_{2}}O_{3}^{--}\to 2{{I}^{-}}+{{S}_{4}}O_{6}^{--}\] equivalent weight of iodine will be equal to [MP PET 2004] |
| A. | 1/2 of molecular weight |
| B. | Molecular weight |
| C. | 1/4 of molecular weight |
| D. | None |
| Answer» B. Molecular weight | |
| 9046. |
Optical activity is shown by |
| A. | Glucose |
| B. | Fructose |
| C. | Sucrose |
| D. | All of these |
| Answer» E. | |
| 9047. |
Lapis lazuli is [AFMC 2004] |
| A. | Ferrous sulphate |
| B. | Copper sulphate |
| C. | Sodium alumino silicate |
| D. | Zinc sulphate |
| Answer» D. Zinc sulphate | |
| 9048. |
An example of non-reducing sugar is [KCET 1988] |
| A. | Cane sugar |
| B. | Fructose |
| C. | Lactose |
| D. | Cellobiose |
| Answer» B. Fructose | |
| 9049. |
Silicon is an important constituent of [MH CET 2001] |
| A. | Rocks |
| B. | Amalgams |
| C. | Chlorophyll |
| D. | Haemoglobin |
| Answer» B. Amalgams | |
| 9050. |
Lime stone is [RPMT 1997] |
| A. | \[CaO\] |
| B. | \[Ca{{(OH)}_{2}}\] |
| C. | Both a and b |
| D. | None of these |
| Answer» E. | |