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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.
| 8701. |
In chemical adsorption, how many layers are adsorbed [MP PMT 1996] |
| A. | One |
| B. | Two |
| C. | Multi |
| D. | Zero |
| Answer» B. Two | |
| 8702. |
When ethylene bromide is treated with \[Zn,\] we get [RPMT 1997] |
| A. | Alkane |
| B. | Alkene |
| C. | Alkyne |
| D. | All |
| Answer» C. Alkyne | |
| 8703. |
Natural gas contains mainly [MNR 1990; UPSEAT 1999, 2000, 01, 02; BCECE 2005] |
| A. | Methane |
| B. | n-butane |
| C. | n-octane |
| D. | Mixture of octane |
| Answer» B. n-butane | |
| 8704. |
Percentage of silver in German silver is [AFMC 2004; CPMT 1985; CBSE PMT 2000; MP PMT 2001] |
| A. | 0 |
| B. | 0.01 |
| C. | 0.05 |
| D. | None of these |
| Answer» E. | |
| 8705. |
In the equilibrium \[C{{H}_{3}}COOH+HF\]⇄ \[C{{H}_{3}}COO{{H}_{2}}^{+}+{{F}^{-}}\] [BHU 1987] |
| A. | \[{{F}^{-}}\]is the conjugate acid of \[C{{H}_{3}}COOH\] |
| B. | \[{{F}^{-}}\]is the conjugate base of \[HF\] |
| C. | \[C{{H}_{3}}COOH\] is the conjugate acid of \[C{{H}_{3}}COO{{H}_{2}}^{+}\] |
| D. | \[C{{H}_{3}}COO{{H}_{2}}^{+}\] is the conjugate base of \[C{{H}_{3}}COOH\] |
| Answer» C. \[C{{H}_{3}}COOH\] is the conjugate acid of \[C{{H}_{3}}COO{{H}_{2}}^{+}\] | |
| 8706. |
In which of the following processes, platinum is used as a catalyst [NCERT 1978, 79] |
| A. | Oxidation of ammonia to form nitric acid |
| B. | Hardening of oils |
| C. | Production of synthetic rubber |
| D. | Synthesis of methanol |
| Answer» B. Hardening of oils | |
| 8707. |
Blood haemoglobin contains the metal |
| A. | Al |
| B. | Mg |
| C. | Cu |
| D. | Fe |
| Answer» E. | |
| 8708. |
Cellulose is a polymer of [KCET 1984] |
| A. | L-fructose |
| B. | D-mannose |
| C. | D-glucose |
| D. | Amylose |
| Answer» D. Amylose | |
| 8709. |
\[C{{u}_{2}}C{{l}_{2}}\] with \[HCl\] in presence of oxidising agents gives [CPMT 1984] |
| A. | \[CuC{{l}_{2}}\] |
| B. | \[{{H}_{2}}CuC{{l}_{2}}\] |
| C. | Hydrogen gas |
| D. | Chlorine gas |
| Answer» B. \[{{H}_{2}}CuC{{l}_{2}}\] | |
| 8710. |
The IUPAC name of \[C{{H}_{3}}COO{{C}_{2}}{{H}_{5}}\] will be [MP PMT/PET 1988; Kurukshetra CEE 1998] |
| A. | Ethyl acetate |
| B. | Ethyl ethanoate |
| C. | Methyl propanoate |
| D. | None of these |
| Answer» C. Methyl propanoate | |
| 8711. |
Which among the following is strongest acid [BHU 2005] |
| A. | H(ClO)O2 |
| B. | H(ClO)O3 |
| C. | H(ClO)O |
| D. | H(ClO) |
| Answer» C. H(ClO)O | |
| 8712. |
Silver sulphide dissolved in a solution of sodium cynamide to form the complex [AMU 1999] |
| A. | \[Na[Ag{{(CN)}_{2}}]\] |
| B. | \[N{{a}_{3}}[Ag{{(CN)}_{4}}]\] |
| C. | \[N{{a}_{5}}[Ag{{(CN)}_{6}}]\] |
| D. | \[N{{a}_{2}}[Ag{{(CN)}_{2}}]\] |
| Answer» B. \[N{{a}_{3}}[Ag{{(CN)}_{4}}]\] | |
| 8713. |
Among the following compounds which have more than one type of hybridisation for carbon atom (i) \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}C{{H}_{3}}\] (ii) \[C{{H}_{3}}-CH=CH-C{{H}_{3}}\] (iii) \[C{{H}_{2}}=CH-C\equiv CH\] (iv) \[H-C\equiv C-H\] [EAMCET 1998] |
| A. | (ii) and (iii) |
| B. | (ii) |
| C. | (iii) and (iv) |
| D. | (iv) |
| Answer» D. (iv) | |
| 8714. |
Which of the following chemicals, in addition to water, are used for the manufacture of \[N{{a}_{2}}C{{O}_{3}}\] by Solvay process [Roorkee 1999] |
| A. | \[NaCl,CO\] and \[N{{H}_{3}}\] |
| B. | \[NaCl,\,C{{O}_{2}}\] and \[N{{H}_{3}}\] |
| C. | \[NaCl,\,N{{H}_{4}}Cl\] and \[C{{O}_{2}}\] |
| D. | \[NaHC{{O}_{3}},\,CO\] and \[N{{H}_{3}}\] |
| Answer» C. \[NaCl,\,N{{H}_{4}}Cl\] and \[C{{O}_{2}}\] | |
| 8715. |
\[B{{F}_{3}}\] is used as a catalyst in several industrial processes due to its [Kerala (Med.) 2002] |
| A. | Strong reducing agent |
| B. | Weak reducing agent |
| C. | Strong Lewis acid nature |
| D. | Weak Lewis acid character |
| Answer» D. Weak Lewis acid character | |
| 8716. |
An organic compound containing carbon hydrogen and oxygen contains 52.20% carbon and 13.04% hydrogen. Vapour density of the compound is 23. Its molecular formula will be [MP PMT 2002] |
| A. | \[{{C}_{2}}{{H}_{6}}O\] |
| B. | \[{{C}_{3}}{{H}_{8}}O\] |
| C. | \[{{C}_{4}}{{H}_{8}}O\] |
| D. | \[{{C}_{5}}{{H}_{10}}O\] |
| Answer» B. \[{{C}_{3}}{{H}_{8}}O\] | |
| 8717. |
The alloy of steel that is used in making automobile parts and utensils [EAMCET 1979; MP PMT 1992] |
| A. | Stainless steel |
| B. | Nickel steel |
| C. | Tungstun steel |
| D. | Chromium steel |
| Answer» B. Nickel steel | |
| 8718. |
An organic compound has been found to possess the Empirical formula \[C{{H}_{2}}O\] and molecular weight 90. The molecular formula of it is \[(C=12,\,\,H=1,\,\text{and}\,\,O=16)\] [CPMT 2000; MP PET 2002] |
| A. | \[{{C}_{3}}{{H}_{6}}{{O}_{3}}\] |
| B. | \[C{{H}_{2}}O\] |
| C. | \[{{C}_{2}}{{H}_{6}}{{O}_{2}}\] |
| D. | \[{{C}_{2}}{{H}_{2}}O\] |
| Answer» B. \[C{{H}_{2}}O\] | |
| 8719. |
Glass reacts with HF to produce [KCET 2000; CBSE PMT PMT 2000] |
| A. | \[Si{{F}_{4}}\] |
| B. | \[{{H}_{2}}Si{{F}_{6}}\] |
| C. | \[{{H}_{2}}Si{{O}_{3}}\] |
| D. | \[N{{a}_{3}}Al{{F}_{6}}\] |
| Answer» B. \[{{H}_{2}}Si{{F}_{6}}\] | |
| 8720. |
Lead pipes are corroded quickly by [AFMC 1981] |
| A. | Dil. \[{{H}_{2}}S{{O}_{4}}\] |
| B. | Conc. \[{{H}_{2}}S{{O}_{4}}\] |
| C. | Acetic acid |
| D. | Water |
| Answer» D. Water | |
| 8721. |
At 298 K, the solubility of \[PbC{{l}_{2}}\] is \[2\times {{10}^{-2}}mol/lit\], then \[{{k}_{sp}}=\] [RPMT 2002] |
| A. | \[1\times {{10}^{-7}}\] |
| B. | \[3.2\times {{10}^{-7}}\] |
| C. | \[1\times {{10}^{-5}}\] |
| D. | \[3.2\times {{10}^{-5}}\] |
| Answer» E. | |
| 8722. |
In dialysis, colloidal particles are separated from [DPMT 1996] |
| A. | Solvent |
| B. | Dispersed phase |
| C. | Ions of electrolytes |
| D. | Particles of dispersion medium |
| Answer» D. Particles of dispersion medium | |
| 8723. |
Which one is an example of gel |
| A. | Soap |
| B. | Cheese |
| C. | Milk |
| D. | Fog |
| Answer» C. Milk | |
| 8724. |
Chloroprene is used in making [MP PET 1985] |
| A. | Synthetic rubber |
| B. | Plastic |
| C. | Petrol |
| D. | All of these |
| Answer» B. Plastic | |
| 8725. |
The petrol having octane number 80 has [MP PET 2000] |
| A. | 20% normal heptane + 80% iso-octane |
| B. | 80% normal heptane + 20% iso-octane |
| C. | 20% normal heptane + 80% normal octane |
| D. | 80% normal heptane + 20% normal octane |
| Answer» B. 80% normal heptane + 20% iso-octane | |
| 8726. |
If wavelength of photon is\[{{X}^{3-}}\]\[h=6.6\times {{10}^{-34}}\]J-sec, then momentum of photon is [MP PET 1999] |
| A. | \[3\times {{10}^{-23}}kg\,m{{s}^{-1}}\] |
| B. | \[3.33\times {{10}^{22}}kg\,m{{s}^{-1}}\] |
| C. | \[1.452\times {{10}^{-44}}\,kg\,m{{s}^{-1}}\] |
| D. | \[6.89\times {{10}^{43}}\,kg\,m{{s}^{-1}}\] |
| Answer» B. \[3.33\times {{10}^{22}}kg\,m{{s}^{-1}}\] | |
| 8727. |
The number of \[\sigma \]and \[\pi \]bonds present in pent-4-ene, 1-yne is [AIIMS 2002; CPMT 2002] |
| A. | 10, 3 |
| B. | 3, 10 |
| C. | 4, 9 |
| D. | 9, 4 |
| Answer» B. 3, 10 | |
| 8728. |
Electrolytic conduction differs from metallic conduction in that in the case of electrolytic conduction [KCET 1987; Bihar CEE 1992] |
| A. | The resistance increases with increasing temperature |
| B. | The resistance decreases with increasing temperature |
| C. | The flow of current does not generate heat |
| D. | The resistance is independent of the length of the conductor |
| Answer» C. The flow of current does not generate heat | |
| 8729. |
Reaction between the following pairs will produce \[{{H}_{2}}\] except [CPMT 1973; CBSE PMT 1998] |
| A. | \[Na+\] ethyl alcohol |
| B. | \[Fe+\] steam |
| C. | \[Fe+{{H}_{2}}S{{O}_{4}}\] (aq.) |
| D. | \[Cu+HCl\] (aq.) |
| Answer» E. | |
| 8730. |
In the following reaction \[H{{C}_{2}}{{O}_{4}}^{-}+P{{O}_{4}}^{---}\] ⇄ \[HP{{O}_{4}}^{--}+{{C}_{2}}{{O}_{4}}^{--}\] Which are the two Bronsted bases [MP PMT 1991] |
| A. | \[0.1\,M\,HCN\] and \[P{{O}_{4}}^{---}\] |
| B. | \[HP{{O}_{4}}^{--}\] and \[{{C}_{2}}{{O}_{4}}^{--}\] |
| C. | \[N{{H}_{4}}Cl\] and \[P{{O}_{4}}^{---}\] |
| D. | \[P{{O}_{4}}^{---}\] and \[pH\] |
| Answer» E. | |
| 8731. |
The energy of an electron in \[{{n}^{th}}\] orbit of hydrogen atom is [MP PET 1999] |
| A. | \[\frac{13.6}{{{n}^{4}}}eV\] |
| B. | \[\frac{13.6}{{{n}^{3}}}eV\] |
| C. | \[\frac{13.6}{{{n}^{2}}}eV\] |
| D. | \[\frac{13.6}{n}eV\] |
| Answer» D. \[\frac{13.6}{n}eV\] | |
| 8732. |
The shape of ethane is [Bihar CEE 1995] |
| A. | Triangular |
| B. | Tetrahedral |
| C. | Linear |
| D. | None of these |
| Answer» C. Linear | |
| 8733. |
\[KMn{{O}_{4}}\] reacts with oxalic acid according to the equation : \[2MnO_{4}^{-}+5{{C}_{2}}O_{4}^{2-}+16{{H}^{+}}\to 2M{{n}^{2+}}+10C{{O}_{2}}+8{{H}_{2}}O\] Here 20 ml of 0.1 M \[KMn{{O}_{4}}\] is equivalent to [CBSE PMT 1996] |
| A. | \[20ml\] of 0.5 M \[{{C}_{2}}{{H}_{2}}{{O}_{4}}\] |
| B. | \[50ml\] of 0.1 M \[{{C}_{2}}{{H}_{2}}{{O}_{4}}\] |
| C. | \[50ml\] of 0.5 M \[{{C}_{2}}{{H}_{2}}{{O}_{4}}\] |
| D. | \[20ml\] of 0.1 M \[{{C}_{2}}{{H}_{2}}{{O}_{4}}\] |
| Answer» C. \[50ml\] of 0.5 M \[{{C}_{2}}{{H}_{2}}{{O}_{4}}\] | |
| 8734. |
The IUPAC name of \[C{{H}_{3}}COCH{{(C{{H}_{3}})}_{2}}\]is [AIEEE 2003] |
| A. | Isopropylmethyl ketone |
| B. | 2-methyl-3-butanone |
| C. | 4-methylisopropyl ketone |
| D. | 3-methyl-2-butanone |
| Answer» E. | |
| 8735. |
What is the product of the reaction of 1, 3-butadiene with Br2 [Orissa JEE 2003] |
| A. | 1,4 -dibromobutene |
| B. | 1,2 -dibromobutene |
| C. | 3,4-dibromobutene |
| D. | 2,3-dibromo-2-butene |
| Answer» B. 1,2 -dibromobutene | |
| 8736. |
The equation for Freundlich adsorption isotherm is [MHCET 2004] |
| A. | \[\frac{x}{m}=k{{p}^{1/n}}\] |
| B. | \[x=mk{{p}^{1/n}}\] |
| C. | \[x/m=k{{p}^{-n}}\] |
| D. | All of these |
| Answer» E. | |
| 8737. |
Toluene on oxidation with dilute \[HN{{O}_{3}}\] and alkaline \[KMn{{O}_{4}}\] gives [DPMT 1981] |
| A. | Benzaldehyde |
| B. | Phenol |
| C. | Nitrotoluene |
| D. | Benzoic acid |
| Answer» E. | |
| 8738. |
Starch is a polymer of [DPMT 1982; CPMT 1975, 80; MP PMT 1994] |
| A. | Glucose |
| B. | Fructose |
| C. | Both A and B |
| D. | None of these |
| Answer» B. Fructose | |
| 8739. |
The extraction of nickel involves |
| A. | The formation of \[Ni{{(CO)}_{4}}\] |
| B. | The decomposition of \[Ni{{(CO)}_{4}}\] |
| C. | The formation and thermal decomposition of \[Ni{{(CO)}_{4}}\] |
| D. | The formation and catalytic decomposition of \[Ni{{(CO)}_{4}}\] |
| Answer» D. The formation and catalytic decomposition of \[Ni{{(CO)}_{4}}\] | |
| 8740. |
Which of the following cycloalkane gives open chain compound, when reacts with bromine [Orissa JEE 2003] |
| A. | Cyclopropane |
| B. | Cyclopentane |
| C. | Cyclohexane |
| D. | Cyclo-octane |
| Answer» B. Cyclopentane | |
| 8741. |
Correct statement is [CPMT 1985] |
| A. | \[N{{H}_{4}}Cl\]gives alkaline solution in water |
| B. | \[C{{H}_{3}}COONa\] gives acidic solution in water |
| C. | \[C{{H}_{3}}COOH\] is a weak acid |
| D. | \[N{{H}_{4}}OH\] is a strong base |
| Answer» D. \[N{{H}_{4}}OH\] is a strong base | |
| 8742. |
The specific charge of proton is \[9.6\times {{10}^{6}}C\,k{{g}^{-1}}\] then for an a-particle it will be [MH CET 1999] |
| A. | \[38.4\times {{10}^{7}}C\,k{{g}^{-1}}\] |
| B. | \[19.2\times {{10}^{7}}C\,k{{g}^{-1}}\] |
| C. | \[2.4\times {{10}^{7}}C\,k{{g}^{-1}}\] |
| D. | \[4.8\times {{10}^{7}}C\,k{{g}^{-1}}\] |
| Answer» E. | |
| 8743. |
Which of the following is currently used as a tyre cord [Kerala (Med.) 2003] |
| A. | Terelene |
| B. | Polyethylene |
| C. | Polypropylene |
| D. | Nylon ? 6 |
| Answer» E. | |
| 8744. |
Collin's reagent is [RPMT 2002] |
| A. | \[MN{{O}_{2}}/HCl\] |
| B. | \[MN{{O}_{4}}/{{C}_{5}}{{H}_{5}}N\] |
| C. | \[{{K}_{2}}C{{r}_{2}}{{O}_{7}}/{{H}_{2}}S{{O}_{4}}\] |
| D. | \[C{{r}_{2}}{{O}_{3}}/2{{C}_{5}}{{H}_{5}}N\] |
| Answer» E. | |
| 8745. |
Which of the following reaction is used to make a fuel cell [AIIMS 2003] |
| A. | \[Cd(s)+2Ni{{(OH)}_{3}}(s)\to CdO(s)+2Ni(OH)+{{H}_{2}}O(l)\] |
| B. | \[Pb(s)+Pb{{O}_{2}}(s)+2{{H}_{2}}S{{O}_{4}}(aq)\to 2PbS{{O}_{4}}(s)+2{{H}_{2}}O(l)\] |
| C. | \[2{{H}_{2}}(g)+{{O}_{2}}(g)\to 2{{H}_{2}}O(l)\] |
| D. | \[2Fe(s)+{{O}_{2}}(g)+4{{H}^{+}}(aq)\to 2F{{e}^{2+}}(aq)+2{{H}_{2}}O(l)\] |
| Answer» D. \[2Fe(s)+{{O}_{2}}(g)+4{{H}^{+}}(aq)\to 2F{{e}^{2+}}(aq)+2{{H}_{2}}O(l)\] | |
| 8746. |
In Freundlich adsorption, isotherm adsorption is proportional to pressure P as [AMU 2002] |
| A. | \[{{P}^{0}}\] |
| B. | \[P\] |
| C. | \[{{P}^{n}}\] |
| D. | \[{{P}^{1/n}}\] |
| Answer» E. | |
| 8747. |
For a weak acid, the incorrect statement is [Pb. PMT 2004] |
| A. | Its dissociation constant is low |
| B. | Its \[p{{K}_{a}}\] is very low |
| C. | It is partially dissociated |
| D. | Solution of its sodium salt is alkaline in water |
| Answer» C. It is partially dissociated | |
| 8748. |
Number of neutrons in a parent nucleus \[X\], which gives \[_{7}{{N}^{14}}\] nucleus after two successive \[\beta \] emissions would be [CBSE PMT 1998; MP PMT 2003] |
| A. | 9 |
| B. | 8 |
| C. | 7 |
| D. | 6 |
| Answer» B. 8 | |
| 8749. |
Slaked lime \[[Ca{{(OH)}_{2}}]\] is used in the manufacture [UPSEAT 2000] |
| A. | Cement |
| B. | Fire bricks |
| C. | Pigment |
| D. | Medicine |
| Answer» C. Pigment | |
| 8750. |
The ionic carbide is [JIPMER 2000] |
| A. | \[ZnC\] |
| B. | \[TiC\] |
| C. | \[SiC\] |
| D. | \[Ca{{C}_{2}}\] |
| Answer» E. | |