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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.
| 10001. |
Which is mild oxidising agent [AFMC 1971] |
| A. | \[A{{g}_{2}}O\] |
| B. | \[KMn{{O}_{4}}\] |
| C. | \[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\] |
| D. | \[C{{l}_{2}}\] |
| Answer» B. \[KMn{{O}_{4}}\] | |
| 10002. |
The IUPAC name of the compound \[C{{H}_{2}}=CH-C{{H}_{2}}-C{{H}_{2}}-C\equiv CH\]is [CBSE PMT 2002; MP PMT 2003] |
| A. | 1, 5-hexenyne |
| B. | 1-hexyne-5-ene |
| C. | 1, 5-hexynene |
| D. | 1-hexene-5-yne |
| Answer» E. | |
| 10003. |
The presence of halogen, in an organic compounds, is detected by [Pb. CET 2002] |
| A. | Iodoform test |
| B. | Silver nitrate test |
| C. | Beilstein?s test |
| D. | Millon?s test |
| Answer» D. Millon?s test | |
| 10004. |
Gasoline is the name of [Roorkee 1989] |
| A. | Crude oil |
| B. | The gaseous constituents of petroleum |
| C. | The mixture of uncondensed gases produced in the distillation of crude oil |
| D. | The mixture of the residue and gas oil obtained in the distillation of crude oil |
| Answer» C. The mixture of uncondensed gases produced in the distillation of crude oil | |
| 10005. |
In the reaction \[2S{{O}_{2}}+{{O}_{2}}\underset{A{{s}_{2}}{{O}_{3}}}{\mathop{\xrightarrow{Pt}}}\,2S{{O}_{3}}\], \[A{{s}_{2}}{{O}_{3}}\] acts as a [MP PET 1995] |
| A. | Autocatalyst |
| B. | Poison |
| C. | Promotor |
| D. | Positive catalyst |
| Answer» C. Promotor | |
| 10006. |
In catalytic reduction of hydrocarbons which catalyst is mostly used [DCE 2001] |
| A. | Pt /Ni |
| B. | Pd |
| C. | \[Si{{O}_{2}}\] |
| D. | Misch Metal |
| Answer» B. Pd | |
| 10007. |
Which of the following alkanes contains primary, secondary, tertiary and quaternary carbon atoms together [MP PET 2001] |
| A. | \[{{(C{{H}_{3}})}_{4}}C\] |
| B. | \[HCHO\] |
| C. | \[C{{H}_{3}}CHO\] |
| D. | \[{{(C{{H}_{3}})}_{4}}C\] |
| Answer» D. \[{{(C{{H}_{3}})}_{4}}C\] | |
| 10008. |
The number of tertiary carbon atoms in the compound \[{{(C{{H}_{3}})}_{2}}CHC{{H}_{2}}C\ {{(C{{H}_{3}})}_{3}}\]is [MP PMT 2001] |
| A. | 2 |
| B. | 3 |
| C. | 1 |
| D. | 4 |
| Answer» D. 4 | |
| 10009. |
Which is most basic in character [BHU 1982] |
| A. | \[RbOH\] |
| B. | \[KOH\] |
| C. | \[NaOH\] |
| D. | \[LiOH\] |
| Answer» B. \[KOH\] | |
| 10010. |
When washing soda is heated [AFMC 2005] |
| A. | CO is released |
| B. | \[CO+C{{O}_{2}}\] is released |
| C. | \[C{{O}_{2}}\] is released |
| D. | Water vapour is released |
| Answer» E. | |
| 10011. |
A moving particle may have wave motion, if |
| A. | Its mass is very high |
| B. | Its velocity is negligible |
| C. | Its mass is negligible |
| D. | Its mass is very high and velocity is negligible |
| Answer» D. Its mass is very high and velocity is negligible | |
| 10012. |
Protons accelerate the hydrolysis of esters. This is an example of [MP PMT 1987] |
| A. | A heterogeneous catalysis |
| B. | An acid-base catalysis |
| C. | A promoter |
| D. | A negative catalyst |
| Answer» C. A promoter | |
| 10013. |
Which one of the following changes when catalyst is used in a reaction |
| A. | Heat of reaction |
| B. | Product of reaction |
| C. | Equilibrium constant |
| D. | Activation energy |
| Answer» E. | |
| 10014. |
Formation of in-numberable compounds of carbon is due to its [RPMT 1999] |
| A. | High reactivity |
| B. | Catenation tendency |
| C. | Covalent and ionic tendency |
| D. | Different valency |
| Answer» C. Covalent and ionic tendency | |
| 10015. |
Natural rubber contains several thousand units of X linked together in the polymer chain. X is [NCERT 1980, 84; BHU 1983; CBSE PMT 1991; MP PMT 2001] |
| A. | Neoprene |
| B. | Isoprene |
| C. | Chloroprene |
| D. | Styrene |
| Answer» C. Chloroprene | |
| 10016. |
The solubility of \[PbC{{l}_{2}}\]is [MP PMT 1995; DCE 1999] |
| A. | \[\sqrt{{{K}_{sp}}}\] |
| B. | \[^{3}\sqrt{{{K}_{sp}}}\] |
| C. | \[^{3}\sqrt{\frac{{{K}_{sp}}}{4}}\] |
| D. | \[\sqrt{8{{K}_{sp}}}\] |
| Answer» D. \[\sqrt{8{{K}_{sp}}}\] | |
| 10017. |
In respect of the equation \[k=A{{e}^{-{{E}_{a}}/RT}}\] in chemical kinetics, which one of the following statement is correct [AIEEE 2003] |
| A. | k is equilibrium constant |
| B. | A is adsorption factor |
| C. | \[{{E}_{a}}\]is energy of activation |
| D. | R is Rydberg?s constant |
| Answer» D. R is Rydberg?s constant | |
| 10018. |
The form of iron having the highest carbon content is [DPMT 2005] |
| A. | Cast iron |
| B. | Wrought iron |
| C. | Strain steel |
| D. | Mild steel |
| Answer» B. Wrought iron | |
| 10019. |
On bombarding \[_{8}{{O}^{16}}\] with deutrons, the nuclei of the product formed will be [NCERT 1978] |
| A. | \[_{9}{{F}^{18}}\] |
| B. | \[_{9}{{F}^{17}}\] |
| C. | \[_{8}{{O}^{17}}\] |
| D. | \[_{7}{{N}^{14}}\] |
| Answer» B. \[_{9}{{F}^{17}}\] | |
| 10020. |
The nucleus of the element having atomic number 25 and atomic weight 55 will contain [CPMT 1986; MP PMT 1987] |
| A. | 25 protons and 30 neutrons |
| B. | 25 neutrons and 30 protons |
| C. | 55 protons |
| D. | 55 neutrons |
| Answer» B. 25 neutrons and 30 protons | |
| 10021. |
PVC is obtained from vinyl chloride by a reaction called |
| A. | Addition |
| B. | Isomerization |
| C. | Polymerization |
| D. | Substitution |
| Answer» D. Substitution | |
| 10022. |
The propene reacts with HBr to form [AIIMS 1999; RPET 1999] |
| A. | Ethane |
| B. | Hexane |
| C. | 1-bromo-propane |
| D. | 2-bromo propane |
| Answer» E. | |
| 10023. |
The nuclear reaction \[_{29}^{63}Cu+_{2}^{4}He\to _{17}^{37}Cl+14_{1}^{1}H+16_{0}^{1}n\] is referred to as [MP PET 2002] |
| A. | Spallation reaction |
| B. | Fusion reaction |
| C. | Fission reaction |
| D. | Chain reaction |
| Answer» B. Fusion reaction | |
| 10024. |
For the reaction \[{{H}_{2}}O(s)\] ⇌ \[{{H}_{2}}O(l)\] at \[{{0}^{o}}C\] and normal pressure [KCET 2001] |
| A. | \[\Delta H>T\Delta S\] |
| B. | \[\Delta H=T\Delta S\] |
| C. | \[\Delta H=\Delta G\] |
| D. | \[\Delta H<T\Delta S\] |
| Answer» C. \[\Delta H=\Delta G\] | |
| 10025. |
The nucleus of tritium contains [MP PMT 2002] |
| A. | 1 proton + 1 neutron |
| B. | 1 proton + 3 neutron |
| C. | 1 proton + 0 neutron |
| D. | 1 proton + 2 neutron |
| Answer» E. | |
| 10026. |
Which of the following has minimum value of flocculating power [MP PET 1989, 90] |
| A. | \[P{{b}^{+2}}\] |
| B. | \[P{{b}^{+4}}\] |
| C. | \[S{{r}^{+2}}\] |
| D. | \[N{{a}^{+}}\] |
| Answer» E. | |
| 10027. |
In Mc Arthur Forest method, silver is extracted from the solution of \[Na[Ag{{(CN)}_{2}}]\] by the use of: [CPMT 2004] |
| A. | Fe |
| B. | Mg |
| C. | Cu |
| D. | Zn |
| Answer» E. | |
| 10028. |
The size of particles in suspension, true solution and colloidal solution varies in the order [BHU 1997] |
| A. | Suspension > Colloidal > True solution |
| B. | Suspension > (Colloidal + True solution) |
| C. | True solution > Suspension > Colloidal |
| D. | None of these |
| Answer» B. Suspension > (Colloidal + True solution) | |
| 10029. |
Which one of the following statements is correct in reversible reaction. A catalyst [MP PET 1994; EAMCET 1987] |
| A. | Increases the rate of forward reaction |
| B. | Decreases the rate of forward reaction |
| C. | Increases the rate of backward and forward reactions |
| D. | Alters the equilibrium constant of the reaction |
| Answer» D. Alters the equilibrium constant of the reaction | |
| 10030. |
Ionic radii are[CBSE PMT 2003, 04] |
| A. | Directly proportional to effective nuclear charge |
| B. | Directly proportional to square of effective nuclear charge |
| C. | Inversely proportional to effective nuclear charge |
| D. | Inversely proportional to square of effective nuclear charge. |
| Answer» D. Inversely proportional to square of effective nuclear charge. | |
| 10031. |
Lewis acid [MP PMT 1987] |
| A. | Presence of H atom is necessary |
| B. | Is a electron pair donor |
| C. | Always a proton donor |
| D. | Is a electron pair acceptor |
| Answer» E. | |
| 10032. |
The ratio between kinetic energy and the total energy of the electrons of hydrogen atom according to Bohr?s model is [Pb. PMT 2002] |
| A. | 2 : 1 |
| B. | 1 : 1 |
| C. | 1 : ? 1 |
| D. | 1 : 2 |
| Answer» D. 1 : 2 | |
| 10033. |
Acidified \[KMn{{O}_{4}}\] is decolourzed by [AMU 1999] |
| A. | \[B{{r}_{2}}\] |
| B. | \[{{O}_{3}}\] |
| C. | HCl |
| D. | HBr |
| Answer» B. \[{{O}_{3}}\] | |
| 10034. |
What is the \[pH\] value of \[\frac{N}{1000}\,KOH\] solution [CPMT 1975; MNR 1986, 91; Pb. CET 2004] |
| A. | \[{{10}^{-11}}\] |
| B. | 3 |
| C. | 2 |
| D. | 11 |
| Answer» E. | |
| 10035. |
What is the product when 2-butyne is treated with liquid \[N{{H}_{3}}\]in presence of lithium [Orissa JEE 2003] |
| A. | n-butane |
| B. | cis-2-butene |
| C. | trans-2-butene |
| D. | 1-butene |
| Answer» D. 1-butene | |
| 10036. |
A metal is burnt in air and the ash on moistening smells of \[N{{H}_{3}}\]. The metal is [KCET 1996] |
| A. | \[Na\] |
| B. | \[Fe\] |
| C. | \[Mg\] |
| D. | \[Al\] |
| Answer» D. \[Al\] | |
| 10037. |
Property of the alkaline earth metals that increases with their atomic number is [IIT 1997] |
| A. | Ionisation energy |
| B. | Solubility of their hydroxides |
| C. | Solubility of their sulphates |
| D. | Electronegativity |
| Answer» C. Solubility of their sulphates | |
| 10038. |
The unit of molar conductivity is [DCE 2002] |
| A. | \[{{\Omega }^{-1}}c{{m}^{-2}}mo{{l}^{-1}}\] |
| B. | \[{{\Omega }^{{}}}c{{m}^{-2}}mo{{l}^{-1}}\] |
| C. | \[{{\Omega }^{-1}}c{{m}^{2}}mo{{l}^{-1}}\] |
| D. | \[\Omega \ c{{m}^{2}}mol\] |
| Answer» D. \[\Omega \ c{{m}^{2}}mol\] | |
| 10039. |
After the emission of one \[\alpha \]-particle followed by one \[\beta -\]particle from the atom of \[_{92}{{X}^{238}}\], the number of neutrons in the atom will be [CBSE PMT 1995] |
| A. | 142 |
| B. | 146 |
| C. | 144 |
| D. | 143 |
| Answer» E. | |
| 10040. |
\[{{H}_{3}}B{{O}_{3}}\] is [IIT Screening 2003] |
| A. | Monobasic and weak Lewis acid |
| B. | Monobasic and weak Bronsted acid |
| C. | Monobasic and strong Lewis acid |
| D. | Tribasic and weak Bronsted acid |
| Answer» B. Monobasic and weak Bronsted acid | |
| 10041. |
Calcium is obtained by [CBSE PMT 1997] |
| A. | Roasting of limestone |
| B. | Electrolysis of solution of calcium chloride in \[{{H}_{2}}O\] |
| C. | Reduction of calcium chloride with carbon |
| D. | Electrolysis of molten anhydrous calcium chloride |
| Answer» E. | |
| 10042. |
Identify the correct statement [CPMT 1997] |
| A. | Elemental sodium can be prepared and isolated by electrolysing an aqueous solution of sodium chloride |
| B. | Elemental sodium is a strong oxidizing agent |
| C. | Elemental sodium is insoluble in ammonia |
| D. | Elemental sodium is easily oxidized |
| Answer» E. | |
| 10043. |
Surface water contains [AFMC 2003] |
| A. | Salt |
| B. | Salt and organic compound |
| C. | Organic compounds |
| D. | Suspended impurities |
| Answer» E. | |
| 10044. |
Sparingly soluble salt is [RPMT 1999] |
| A. | \[KCl\] |
| B. | \[NaCl\] |
| C. | \[N{{H}_{4}}Cl\] |
| D. | \[BaS{{O}_{4}}\] |
| Answer» E. | |
| 10045. |
Which of the following gives a green colour to flame [AFMC 2001] |
| A. | Barium |
| B. | Calcium |
| C. | Strontium |
| D. | None of these |
| Answer» B. Calcium | |
| 10046. |
Among the alkaline earth metals the element forming predominantly covalent compound is [MP PET 1999] |
| A. | Barium |
| B. | Strontium |
| C. | Calcium |
| D. | Berylium |
| Answer» E. | |
| 10047. |
Which of the following is not a Lewis acid [J & K 2005] |
| A. | \[B{{F}_{3}}\] |
| B. | \[AlC{{l}_{3}}\] |
| C. | \[HCl\] |
| D. | \[LiAl{{H}_{4}}\] |
| Answer» E. | |
| 10048. |
If gold number of A,B,C and D are 0.005, 0.05, 0.5 and 5 respectively, then which of the following will have the highest protective power [Pb. CET 2001; CPMT 2000] |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» B. B | |
| 10049. |
How much coulomb charge is present on 1g ion of \[{{N}^{3-}}\] |
| A. | \[5.2\times {{10}^{6}}\]Couloumb |
| B. | \[2.894\times {{10}^{5}}\]Couloumb |
| C. | \[6.6\times {{10}^{6}}\]Couloumb |
| D. | \[8.2\times {{10}^{6}}\]Couloumb |
| Answer» C. \[6.6\times {{10}^{6}}\]Couloumb | |
| 10050. |
The most appropriate statement regarding organic compounds is |
| A. | They possess ionic and covalent bonds |
| B. | Presence of carbon is not essential |
| C. | They are found in a large number |
| D. | Their reactions are fast |
| Answer» D. Their reactions are fast | |