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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.
| 8751. |
Glucose gives silver mirror with Tollen's reagent. It shows the presence of [MNR 1981; CPMT 1974, 81; MP PMT 1994] |
| A. | An acidic group |
| B. | An alcoholic group |
| C. | A ketonic group |
| D. | An aldehydic group |
| Answer» E. | |
| 8752. |
Which of the following are isoelectronic species \[I=CH_{3}^{+},\,II-N{{H}_{2}},\,III-NH_{4}^{+},\,IV-N{{H}_{3}}\] [CPMT 1999] |
| A. | I, II, III |
| B. | II, III, IV |
| C. | I, II, IV |
| D. | I and II |
| Answer» C. I, II, IV | |
| 8753. |
In solid \[CuS{{O}_{4}}.5{{H}_{2}}O\] copper is co-ordinated to [MP PET 1985, 86] |
| A. | Five water molecules |
| B. | Four water molecules |
| C. | One sulphate anion |
| D. | One water molecule |
| Answer» C. One sulphate anion | |
| 8754. |
A solid compound 'X' on heating gives \[C{{O}_{2}}\] gas and a residue. The residue mixed with water forms 'Y'. On passing an excess of \[C{{O}_{2}}\]through 'Y' in water, a clear solution, 'Z' is obtained. On boiling 'Z', compound 'X' is reformed. The compound 'X' is [CBSE PMT 2004] |
| A. | \[N{{a}_{2}}C{{O}_{3}}\] |
| B. | \[{{K}_{2}}C{{O}_{3}}\] |
| C. | \[Ca{{(HC{{O}_{3}})}_{2}}\] |
| D. | \[CaC{{O}_{3}}\] |
| Answer» E. | |
| 8755. |
A metal M reacts with \[{{N}_{2}}\] to give a compound 'A' \[({{M}_{3}}N)\]. 'A' on heating at high temperature gives back 'M' and 'A' on reacting with \[{{H}_{2}}O\]gives a gas 'B'. 'B' turns \[CuS{{O}_{4}}\]solution blue on passing through it. A and B can be [DCE 2003] |
| A. | Al and \[N{{H}_{3}}\] |
| B. | Li and \[N{{H}_{3}}\] |
| C. | Na and \[N{{H}_{3}}\] |
| D. | Mg and \[N{{H}_{3}}\] |
| Answer» C. Na and \[N{{H}_{3}}\] | |
| 8756. |
Photoelectric effect is maximum in [AFMC 2004] |
| A. | \[Cs\] |
| B. | Na |
| C. | K |
| D. | Li |
| Answer» B. Na | |
| 8757. |
At the critical micelle concentration, the surfactant molecules [CBSE PMT 1998] |
| A. | Decompose |
| B. | Dissociate |
| C. | Associate |
| D. | Become completely soluble |
| Answer» D. Become completely soluble | |
| 8758. |
The wavelength of a spectral line for an electronic transition is inversely related to [IIT 1988] |
| A. | The number of electrons undergoing the transition |
| B. | The nuclear charge of the atom |
| C. | The difference in the energy of the energy levels involved in the transition |
| D. | The velocity of the electron undergoing the transition |
| Answer» D. The velocity of the electron undergoing the transition | |
| 8759. |
In any ferric salt, on adding potassium ferrocyanide, a prussian blue colour is obtained, which is [BIT 1992; BHU 2002] |
| A. | \[{{K}_{3}}Fe{{(CN)}_{6}}\] |
| B. | \[KFe\left[ Fe{{\left( CN \right)}_{6}} \right]\] |
| C. | \[FeS{{O}_{4}}.Fe{{(CN)}_{6}}\] |
| D. | \[F{{e}_{4}}{{\left[ Fe{{(CN)}_{6}} \right]}_{3}}\] |
| Answer» E. | |
| 8760. |
Natural rubber is basically a polymer of or The monomer of natural polymer rubber is [MP PMT 1993, 95, 98, 99, 2000, 01; RPET 2000; MP PMT/PET 1998; MP PET 1994, 95, 98, 2001; BHU 1999; 2001; CBSE PMT 1999] |
| A. | Neoprene |
| B. | Isoprene |
| C. | Chloroprene |
| D. | Butadiene |
| Answer» C. Chloroprene | |
| 8761. |
\[_{13}A{{l}^{28}}\] when radiated by suitable projectile gives \[_{15}{{P}^{31}}\] and neutron. The projectile used is [MP PMT/PET 1988; CPMT 1985, 82] |
| A. | Proton |
| B. | Neutron |
| C. | Alpha particle |
| D. | Deuteron |
| Answer» D. Deuteron | |
| 8762. |
Which of the following reactions is shown by alkynes [AMU 1984; RPMT 2000] |
| A. | Addition |
| B. | Substitution |
| C. | Polymerization |
| D. | All of these |
| Answer» E. | |
| 8763. |
What should be the weight and moles of \[AgCl\]precipitate obtained on adding 500ml of 0.20 M \[HCl\]in 30 g of \[AgN{{O}_{3}}\]solution? (\[AgN{{O}_{3}}\]= 170) |
| A. | 14.35 g |
| B. | 15 g |
| C. | 18 g |
| D. | 19 g |
| Answer» B. 15 g | |
| 8764. |
Rusting on iron needs [MP PMT 1995] |
| A. | Dry air |
| B. | Air and water |
| C. | Distilled water and carbon dioxide |
| D. | Oxygen and carbon dioxide |
| Answer» C. Distilled water and carbon dioxide | |
| 8765. |
Propyne on polymerisation gives [CPMT 1999, 2002] |
| A. | Mesitylene |
| B. | Benzene |
| C. | Ethyl benzene |
| D. | Propyl benzene |
| Answer» B. Benzene | |
| 8766. |
Best quality of steel is manufactured by [BHU 1996] |
| A. | Siemen -Martin's open hearth process |
| B. | Electrical process |
| C. | Bessemer process |
| D. | Blast furnace |
| Answer» B. Electrical process | |
| 8767. |
The number of dative bonds in sulphuric acid molecules is [MP PET 2002] |
| A. | 0 |
| B. | 1 |
| C. | 2 |
| D. | 4 |
| Answer» D. 4 | |
| 8768. |
The IUPAC name of \[C{{H}_{3}}-\underset{C{{H}_{3}}}{\overset{OH}{\mathop{\underset{|\,\,\,\,\,\,\,}{\overset{|\,\,\,\,\,\,\,}{\mathop{C\,-\,\,}}}\,}}}\,C{{H}_{2}}-\overset{OH}{\mathop{\overset{|\,\,\,\,\,}{\mathop{CH}}\,}}\,-C{{H}_{3}}\] is [KCET (Med.) 2001; UPSEAT 1999, 2002] |
| A. | 4-methyl-2, 4, pentanediol |
| B. | 1, 1-dimethyl 1, 1, 3 butanediol |
| C. | 2-methyl-2, 4 pentanediol |
| D. | 1, 2, 3-trimethyl-1, 3 propanediol |
| Answer» D. 1, 2, 3-trimethyl-1, 3 propanediol | |
| 8769. |
The nitride ion in lithium nitride is composed of [KCET 2000] |
| A. | 7 protons + 10 electrons |
| B. | 10 protons + 10 electrons |
| C. | 7 protons + 7 protons |
| D. | 10 protons + 7 electrons |
| Answer» B. 10 protons + 10 electrons | |
| 8770. |
Which of the following is not a Lewis acid [MP PET 2002] |
| A. | CO |
| B. | \[SiC{{l}_{4}}\] |
| C. | \[S{{O}_{3}}\] |
| D. | \[Z{{n}^{2+}}\] |
| Answer» B. \[SiC{{l}_{4}}\] | |
| 8771. |
Which of the following has largest size [MP PMT 1995, 2003; JIPMER (Med.) 2002] |
| A. | Al |
| B. | \[A{{l}^{+}}\] |
| C. | \[A{{l}^{+2}}\] |
| D. | \[A{{l}^{+3}}\] |
| Answer» B. \[A{{l}^{+}}\] | |
| 8772. |
Which is smallest in size [RPMT 1997] |
| A. | \[{{O}^{2-}}\] |
| B. | \[{{C}^{4-}}\] |
| C. | \[{{F}^{-}}\] |
| D. | \[{{N}^{3-}}\] |
| Answer» D. \[{{N}^{3-}}\] | |
| 8773. |
A metal used in storage batteries is |
| A. | Copper |
| B. | Lead |
| C. | Tin |
| D. | Nickel |
| Answer» C. Tin | |
| 8774. |
Which of the following aqueous solutions containing 10 gm of solute in each case has highest B.P. |
| A. | \[NaCl\]solution |
| B. | \[KCl\] solution |
| C. | Sugar solution |
| D. | Glucose solution |
| Answer» B. \[KCl\] solution | |
| 8775. |
Which of the following does not represent the correct order of the property indicated [CBSE PMT 1997] |
| A. | \[S{{c}^{3+}}>C{{r}^{3+}}>F{{e}^{3+}}>M{{n}^{3+}}\] ionic radii |
| B. | \[Sc<Ti<Cr<Mn\] Density |
| C. | \[M{{n}^{2+}}>N{{i}^{2+}}<C{{o}^{2+}}<F{{e}^{2+}}\] ionic radii |
| D. | \[FeO<CaO>MnO>CuO\] Basic nature |
| Answer» B. \[Sc<Ti<Cr<Mn\] Density | |
| 8776. |
Sodium stearate forms in water |
| A. | True solution |
| B. | A suspension |
| C. | An emulsion |
| D. | A colloidal solution |
| Answer» E. | |
| 8777. |
IUPAC name of \[{{(C{{H}_{3}})}_{2}}CH-CH=CH-C{{H}_{3}}\] is [CPMT 1987; AMU 1985] |
| A. | 2-methyl-3-pentene |
| B. | 4-methyl-2-pentene |
| C. | 1, 2-isopropyl-1-propene |
| D. | 3-isopropyl-2-propene |
| Answer» C. 1, 2-isopropyl-1-propene | |
| 8778. |
IUPAC name of \[C{{H}_{2}}=CH-CH{{(C{{H}_{3}})}_{2}}\] is [IIT-JEE 1987; CBSE PMT 1988; CPMT 1989; MNR 1995; UPSEAT 2001; RPMT 2002] |
| A. | 1, 1-dimethyl-2-propene |
| B. | 3-methyl-1-butene |
| C. | 2-vinyl propane |
| D. | 1-isopropyl ethylene |
| Answer» C. 2-vinyl propane | |
| 8779. |
Aluminium chloride exists as dimer, \[A{{l}_{2}}C{{l}_{6}}\] in solid state as well as in solution of non-polar solvents such as benzene. When dissolved in water, it gives [AIEEE 2004] |
| A. | \[{{[Al{{(OH)}_{6}}]}^{3-}}+3HCl\] |
| B. | \[{{[Al{{({{H}_{2}}O)}_{6}}]}^{3+}}+3C{{l}^{-}}\] |
| C. | \[A{{l}^{3+}}+3C{{l}^{-}}\] |
| D. | \[A{{l}_{2}}{{O}_{3}}+6HCl\] |
| Answer» E. | |
| 8780. |
Large energy released in an atomic bomb explosion is mainly due to [CPMT 1972, 73, 81, 90] |
| A. | Products having a lesser mass than initial substance |
| B. | Conversion of heavier to lighter atoms |
| C. | Release of neutrons |
| D. | Release of electrons |
| Answer» B. Conversion of heavier to lighter atoms | |
| 8781. |
In benzene the total number of \[\sigma \] bonds is [MP PMT 1997] |
| A. | 3 |
| B. | 6 |
| C. | 9 |
| D. | 12 |
| Answer» E. | |
| 8782. |
When sodium is heated with moist air, then the product obtained is [AIIMS 1999] |
| A. | \[N{{a}_{2}}O\] |
| B. | \[NaOH\] |
| C. | \[N{{a}_{2}}C{{O}_{3}}\] |
| D. | \[N{{a}_{2}}{{O}_{2}}\] |
| Answer» B. \[NaOH\] | |
| 8783. |
Which metal forms amide with \[N{{H}_{3}}\] at \[{{300}^{o}}C\] [CPMT 1994] |
| A. | \[Mg\] |
| B. | \[Pb\] |
| C. | \[Al\] |
| D. | \[Na\] |
| Answer» E. | |
| 8784. |
Propane is obtained from propene, by which of the following methods [CBSE PMT 2001; AFMC 2001] |
| A. | Wurtz reaction |
| B. | Dehydrogenation |
| C. | Frankland reaction |
| D. | Catalytic hydrogenation |
| Answer» E. | |
| 8785. |
Milk is an example of [BIT 1992; CPMT 1994; MP PET 1996; BHU 1996] |
| A. | Pure solution |
| B. | Emulsion |
| C. | Gel |
| D. | Suspension |
| Answer» C. Gel | |
| 8786. |
0.5 M ammonium benzoate is hydrolysed to 0.25 percent, hence its hydrolysis constant is [MH CET 2004] |
| A. | \[2.5\times {{10}^{-5}}\] |
| B. | \[1.5\times {{10}^{-4}}\] |
| C. | \[3.125\times {{10}^{-6}}\] |
| D. | \[6.25\times {{10}^{-4}}\] |
| Answer» D. \[6.25\times {{10}^{-4}}\] | |
| 8787. |
Graphite is soft while diamond is hard because [BHU 2003] |
| A. | Graphite is in powder form |
| B. | Diamond has \[s{{p}^{2}}\]hybridization but graphite has \[s{{p}^{3}}\]hybridization |
| C. | Graphite is in planar form while diamond is in tetrahedral form |
| D. | Graphite is covalent and diamond is ionic |
| Answer» D. Graphite is covalent and diamond is ionic | |
| 8788. |
Alkaline earth metals belong to the [KCET (Med.) 2001] |
| A. | \[Ba{{(OH)}_{2}}\] block in periodic table |
| B. | \[p-\] block in periodic table |
| C. | \[d-\] block in periodic table |
| D. | \[f-\] block in periodic table |
| Answer» B. \[p-\] block in periodic table | |
| 8789. |
Which of the following alkenes gives only acetic acid and on oxidation with potassium permanganate solution [MP PET 2003] |
| A. | Ethylene |
| B. | 1-Butene |
| C. | Propene |
| D. | 2-Butene |
| Answer» D. 2-Butene | |
| 8790. |
The compound having both sp and \[s{{p}^{2}}\] hybridised carbon atom is [IIT-JEE 1981] |
| A. | Propene |
| B. | Propyne |
| C. | Propadiene |
| D. | None of these |
| Answer» D. None of these | |
| 8791. |
Highest entropy is in [BVP 2003] |
| A. | Hydrogen |
| B. | Water |
| C. | Graphite |
| D. | Mercury |
| Answer» B. Water | |
| 8792. |
Which one of the following statement is wrong in case of enzyme catalysis [MP PMT 1985, 2001] |
| A. | Enzymes work best at an optimum temperature |
| B. | Enzymes work at an optimum \[pH\] |
| C. | Enzymes are highly specific for substances |
| D. | An enzyme raises activation energy |
| Answer» E. | |
| 8793. |
Which of the following is thermoplastic |
| A. | Nylon |
| B. | Polyethylene |
| C. | Terylene |
| D. | All of these |
| Answer» E. | |
| 8794. |
The substance used to decolourise and purify oils is [MP PMT 1987] |
| A. | Sodium carbonate |
| B. | Sodium chloride |
| C. | Sodium hydroxide |
| D. | Sodium sulphate |
| Answer» D. Sodium sulphate | |
| 8795. |
Ammonia gas dissolves in water to give \[N{{H}_{4}}OH.\] In this reaction water acts as [CPMT 1990; MP PMT 1990] |
| A. | An acid |
| B. | A base |
| C. | A salt |
| D. | A conjugate base |
| Answer» B. A base | |
| 8796. |
The weight of a molecule of the compound \[{{C}_{60}}{{H}_{122}}\]is [AIIMS 2000] |
| A. | \[1.4\times {{10}^{-21}}\]g |
| B. | \[1.09\times {{10}^{-21}}\]g |
| C. | \[5.025\times {{10}^{23}}\]g |
| D. | \[16.023\times {{10}^{23}}\]g |
| Answer» B. \[1.09\times {{10}^{-21}}\]g | |
| 8797. |
Which law of thermodyanamics help in calculating entropy at different temperatures [Pb. CET 2003] |
| A. | First law |
| B. | Second law |
| C. | Third law |
| D. | Zeroth law |
| Answer» D. Zeroth law | |
| 8798. |
The correct representation for solubility product of \[Sn{{S}_{2}}\]is [CPMT 1977; MP PET 1999;RPMT 2000] |
| A. | \[3\times {{10}^{-2}}\,M\] |
| B. | \[[S{{n}^{2+}}]\,\,{{[{{S}^{2-}}]}^{2}}\] |
| C. | \[[S{{n}^{2+}}]\,\,[2{{S}^{2-}}]\] |
| D. | \[[S{{n}^{4+}}]\,\,{{[2{{S}^{2-}}]}^{2}}\] |
| Answer» B. \[[S{{n}^{2+}}]\,\,{{[{{S}^{2-}}]}^{2}}\] | |
| 8799. |
A nitrate when mixed with common salt gives a white precipitate which is soluble in dilute \[N{{H}_{4}}OH\]. It is the nitrate of [CPMT 1985] |
| A. | Copper |
| B. | Mercury |
| C. | Silver |
| D. | Gold |
| Answer» D. Gold | |
| 8800. |
The method of concentrating the ore which makes use of the difference in density between ore and impurities is called [Pune CET 1998] |
| A. | Levigation |
| B. | Leaching |
| C. | Magnetic separation |
| D. | Liquifaction |
| Answer» B. Leaching | |