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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.
| 9551. |
The ammonia evolved from the treatment of 0.30 g of an organic compound for the estimation of nitrogen was passed in 100 mL of 0.1 M sulphuric acid. The excess of acid required 20 mL of 0.5 M sodium hydroxide solution for complete neutralization. The organic compound is [AIEEE 2004] |
| A. | Urea |
| B. | Benzamide |
| C. | Acetamide |
| D. | Thiourea |
| Answer» B. Benzamide | |
| 9552. |
Azeotropic mixture are [CPMT 1982] |
| A. | Constant temperature boiling mixtures |
| B. | Those which boils at different temperatures |
| C. | Mixture of two solids |
| D. | None of the above |
| Answer» B. Those which boils at different temperatures | |
| 9553. |
In nitriding process of steel [MP PET/PMT 1988; CBSE 1989] |
| A. | Steel is heated in an atmosphere of ammonia |
| B. | Steel is made red hot and then cooled |
| C. | Steel is made red hot and then plunged into oil for cooling |
| D. | None of these |
| Answer» B. Steel is made red hot and then cooled | |
| 9554. |
Isobutene \[+HBr\,\,\xrightarrow[\text{Peroxide}]{}\] product is [BHU 2003] |
| A. | Tertiary butyl bromide |
| B. | Isobutyl bromide |
| C. | Tertiary butyl alcohol |
| D. | Isobutyl alcohol |
| Answer» C. Tertiary butyl alcohol | |
| 9555. |
Which does not react with chlorine in dark [Pb. PMT 2000] |
| A. | \[{{C}_{2}}{{H}_{4}}\] |
| B. | \[{{C}_{2}}{{H}_{2}}\] |
| C. | \[C{{H}_{4}}\] |
| D. | \[C{{H}_{3}}CHO\] |
| Answer» D. \[C{{H}_{3}}CHO\] | |
| 9556. |
IUPAC name of \[C{{H}_{3}}-CH=CH-COOH\] [RPET 2000] |
| A. | 2-butenoic acid |
| B. | 1-butenoic acid |
| C. | b-butenoic acid |
| D. | 1-carboxy -1-propene |
| Answer» B. 1-butenoic acid | |
| 9557. |
IUPAC name of \[{{(C{{H}_{3}})}_{2}}\,CH-CHO\] is: [RPET 2000] |
| A. | 2-methyl propanal |
| B. | 1-methyl-2 propanal |
| C. | 2, 2-dimethyl propanal |
| D. | None of these |
| Answer» B. 1-methyl-2 propanal | |
| 9558. |
Water gas is [CPMT 1993, 2004; Pb. PMT 2004] |
| A. | \[CO+C{{O}_{2}}\] |
| B. | \[CO+{{N}_{2}}\] |
| C. | \[CO+{{H}_{2}}\] |
| D. | \[CO+{{N}_{2}}+{{H}_{2}}\] |
| Answer» D. \[CO+{{N}_{2}}+{{H}_{2}}\] | |
| 9559. |
The acid that results when a base accepts a proton is called [Kerala (Med.) 2002] |
| A. | Conjugate base of the acid |
| B. | Conjugate protonated base |
| C. | Lewis base |
| D. | Conjugate acid of the base |
| E. | None of these |
| Answer» E. None of these | |
| 9560. |
Copper sulphate solution reacts with \[KCN\] to give [MP PMT 1992; MNR 1994; IIT 1996; AIIMS 1999; CBSE PMT 2002] |
| A. | \[Cu{{(CN)}_{2}}\] |
| B. | \[CuCN\] |
| C. | \[{{K}_{2}}[Cu{{(CN)}_{4}}]\] |
| D. | \[{{K}_{3}}[Cu{{(CN)}_{4}}]\] |
| Answer» E. | |
| 9561. |
Benzene reacts with \[C{{H}_{3}}COCl\] in the presence of \[AlC{{l}_{3}}\] to give [DPMT 1983; CBSE PMT 1991] |
| A. | \[{{C}_{6}}{{H}_{5}}Cl\] |
| B. | \[{{C}_{6}}{{H}_{5}}COCl\] |
| C. | \[{{C}_{6}}{{H}_{5}}C{{H}_{3}}\] |
| D. | \[{{C}_{6}}{{H}_{5}}COC{{H}_{3}}\] |
| Answer» E. | |
| 9562. |
Which one of the following forms with an excess of \[C{{N}^{-}}\] (Cyanide) a complex having coordination number two [AIIMS 2004] |
| A. | \[C{{u}^{+}}\] |
| B. | \[A{{g}^{+}}\] |
| C. | \[N{{i}^{2+}}\] |
| D. | \[F{{e}^{2+}}\] |
| Answer» C. \[N{{i}^{2+}}\] | |
| 9563. |
A carbohydrate that cannot be hydrolysed to simpler forms is called |
| A. | Disaccharide |
| B. | Monosaccharide |
| C. | Polysaccharide |
| D. | Trisaccharide |
| Answer» C. Polysaccharide | |
| 9564. |
Which of the following ions has the smallest radius [KCET 1992] |
| A. | \[B{{e}^{2+}}\] |
| B. | \[L{{i}^{+}}\] |
| C. | \[{{O}^{2-}}\] |
| D. | \[{{F}^{-}}\] |
| Answer» B. \[L{{i}^{+}}\] | |
| 9565. |
An atom of an element has electronic configuration 2, 8, 1. Which of the following statement is correct [MP PMT 1994] |
| A. | The element's valency is 7 |
| B. | The element exists as a diatomic molecule |
| C. | The element is of non-metallic nature |
| D. | The element forms a basic oxide |
| Answer» E. | |
| 9566. |
Nuclei tend to have more neutrons than protons at high mass numbers because [Roorkee Qualifying 1998] |
| A. | Neutrons are neutral particles |
| B. | Neutrons have more mass than protons |
| C. | More neutrons minimize the coulomb repulsion |
| D. | Neutrons decrease the binding energy |
| Answer» C. More neutrons minimize the coulomb repulsion | |
| 9567. |
The element with atomic number 84 and mass number 218 change to other element with atomic number 84 and mass number 214. The number of \[\alpha \] and \[\beta \]-particles emitted are respectively [CPMT 1989] |
| A. | 1, 3 |
| B. | 1, 4 |
| C. | 1, 2 |
| D. | 1, 5 |
| Answer» D. 1, 5 | |
| 9568. |
Neutrons are found in atoms of all elements except in [MP PMT 1997] |
| A. | Chlorine |
| B. | Oxygen |
| C. | Argon |
| D. | Hydrogen |
| Answer» E. | |
| 9569. |
Which of the following is Lewis acid [NCERT 1978; EAMCET 1987; MP PET 1994; CPMT 1990; AFMC 1997; RPMT 1999] |
| A. | \[B{{F}_{3}}\] |
| B. | \[C{{l}^{-}}\] |
| C. | \[{{H}_{2}}O\] |
| D. | \[N{{H}_{3}}\] |
| Answer» B. \[C{{l}^{-}}\] | |
| 9570. |
If the absorbate is held on a surface by weak Vander Waal's forces, the absorption process is called [Kerala (Med.) 2002] |
| A. | Physical adsorption |
| B. | Chemical adsorption |
| C. | Heat of adsorption |
| D. | Enthalpy of adsorption |
| Answer» B. Chemical adsorption | |
| 9571. |
The atomic number of an element having the valency shell electronic configuration \[4{{s}^{2}}4{{p}^{6}}\] is [MP PMT 1991] |
| A. | 35 |
| B. | 36 |
| C. | 37 |
| D. | 38 |
| Answer» C. 37 | |
| 9572. |
IUPAC name of the compound is \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}C{{H}_{2}}C{{H}_{2}}-\underset{C{{H}_{3}}\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,}{\mathop{CH-}}\,}}\,\underset{C{{H}_{2}}\,\,C{{H}_{2}}C{{H}_{3}}\,\,\,\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\overset{C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\overset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{C-C{{H}_{2}}C{{H}_{3}}\,\,\,\,\,\,\,}}\,}}\,}}\,}}\,\] [NCERT 1982; MP PET 1994] |
| A. | 3, 4-dimethyl-3-n-propyl nonane |
| B. | 5, 7-dimethyl-7-n-propyl nonane |
| C. | 4, 5-dimethyl-4-ethyl decane |
| D. | 6, 7-dimethyl-7-ethyl decane |
| Answer» D. 6, 7-dimethyl-7-ethyl decane | |
| 9573. |
IUPAC name of \[C{{H}_{3}}-\underset{C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{CH-C{{H}_{2}}}}\,}}\,-CH=C{{H}_{2}}\] is [DPMT 1982, 83; Manipal MEE 1995] |
| A. | 2-methyl pentene |
| B. | 4-methyl pentene-1 |
| C. | 1-hexene |
| D. | 2-methyl pentene-1 |
| Answer» C. 1-hexene | |
| 9574. |
In the manufacture of metallic sodium by the fused salt electrolysis (Down's process) a small amount of calcium chloride is added to [MP PET 1993; MP PMT 1994] |
| A. | Improve the electrical conduction |
| B. | Increase the temperature of electrolysis |
| C. | Bring down the melt temperature |
| D. | Stabilize the metallic sodium |
| Answer» D. Stabilize the metallic sodium | |
| 9575. |
Pyrolusite is [DPMT 2002] |
| A. | Carbonate ore |
| B. | Sulphur ore |
| C. | Silicon ore |
| D. | None of these |
| Answer» E. | |
| 9576. |
Squashes are stored by adding [AFMC 1989] |
| A. | Citric acid |
| B. | \[KCl\] |
| C. | \[N{{a}_{2}}S{{O}_{3}}\] |
| D. | Sodium metabisulphite |
| Answer» E. | |
| 9577. |
Sodium thiosulphate \[(N{{a}_{2}}{{S}_{2}}{{O}_{3}}.5{{H}_{2}}O)\] is used in photography to [CPMT 1972, 74, 79; DPMT 1983; Bihar CEE 1995; MNR 1995] |
| A. | Reduce silver bromide to metallic silver |
| B. | Convert metallic silver to silver salt |
| C. | Remove undecomposed \[AgBr\]as a soluble silver thisulphate complex |
| D. | Remove unreduced silver |
| Answer» D. Remove unreduced silver | |
| 9578. |
Ozonolysis of acetylene gives [RPMT 1999] |
| A. | Glycol |
| B. | Glyoxal,formic acid |
| C. | Formaldehyde |
| D. | None |
| Answer» C. Formaldehyde | |
| 9579. |
Lactose on hydrolysis gives [KCET 1983] |
| A. | Two glucose molecules |
| B. | Two galactose molecules |
| C. | A galactose molecule and a fructose molecule |
| D. | A galactose molecule and a glucose molecule |
| Answer» E. | |
| 9580. |
What should be the weight of 50% HCl which reacts with 100 g of limestone |
| A. | 50% pure |
| B. | 25% pure |
| C. | 10% pure |
| D. | 8% pure |
| Answer» B. 25% pure | |
| 9581. |
\[{{N}_{2}}\] is found in a litre flask under \[100kPa\] pressure and \[{{O}_{2}}\] is found in another 3 litre flask under \[320\,kPa\] pressure. If the two flasks are connected, the resultant pressures is [Kerala PMT 2004] |
| A. | 310 kPa |
| B. | 210 kPa |
| C. | 420 kPa |
| D. | 365 kPa |
| E. | 265 kPa |
| Answer» F. | |
| 9582. |
Correct formula of calomel is [CPMT 1994; AFMC 1998] |
| A. | \[H{{g}_{2}}C{{l}_{2}}\] |
| B. | \[HgC{{l}_{2}}\] |
| C. | \[HgC{{l}_{2}}.{{H}_{2}}O\] |
| D. | \[HgS{{O}_{4}}\] |
| Answer» B. \[HgC{{l}_{2}}\] | |
| 9583. |
The minimum energy a molecule should possess in order to enter into a fruitful collision is known as [Kurukshetra CEE 2002] |
| A. | Reaction energy |
| B. | Collision energy |
| C. | Activation energy |
| D. | Threshold energy |
| Answer» E. | |
| 9584. |
Red lead in an example of a/an .... oxide [JIPMER 2001] |
| A. | Basic |
| B. | Super |
| C. | Mixed |
| D. | Amphoteric |
| Answer» D. Amphoteric | |
| 9585. |
p-nitrophenol and o-nitrophenol are separated by [BVP 2004] |
| A. | Crystallisation |
| B. | Fractional crystallisation |
| C. | Distillation |
| D. | Steam distillation |
| Answer» E. | |
| 9586. |
Quantitative measurement of nitrogen in an organic compounds is done by the method [CPMT 2004] |
| A. | Berthelot method |
| B. | Belstein method |
| C. | Lassaigne test |
| D. | Kjheldahl's method |
| Answer» E. | |
| 9587. |
Nitrating mixture is [MH CET 2004] |
| A. | Fuming nitric acid |
| B. | Mixture of conc. \[{{H}_{2}}S{{O}_{4}}\] and conc. \[HN{{O}_{3}}\] |
| C. | Mixture of nitric acid and anhydrous zinc chloride |
| D. | None of these |
| Answer» C. Mixture of nitric acid and anhydrous zinc chloride | |
| 9588. |
Purification of aluminium done by electrolytic refining is known as [CPMT 1989; CBSE PMT 1999; RPET 2003; BCECE 2005] |
| A. | Serpeck's process |
| B. | Hall's process |
| C. | Baeyer's process |
| D. | Hoop's process |
| Answer» E. | |
| 9589. |
The property of the alkaline earth metals that increases with their atomic number is [BHU 2001] |
| A. | Ionisation energy |
| B. | Electronegativity |
| C. | Solubility of their sulphates |
| D. | Solubility of their hydroxides |
| Answer» E. | |
| 9590. |
7.5 grams of a gas occupy 5.8 litres of volume at STP the gas is |
| A. | \[NO\] |
| B. | \[{{N}_{2}}O\] |
| C. | \[CO\] |
| D. | \[C{{O}_{2}}\] |
| Answer» B. \[{{N}_{2}}O\] | |
| 9591. |
The \[\alpha \]-particle scattering experiment of Rutherford concluded that [Orissa JEE 1997] |
| A. | The nucleus is made up of protons and neutrons |
| B. | The number of electrons is exactly equal to number of protons in atom |
| C. | The positive charge of the atom is concentrated in a very small space |
| D. | Electrons occupy discrete energy levels |
| Answer» D. Electrons occupy discrete energy levels | |
| 9592. |
Collision theory is applicable to [MP PMT 2002] |
| A. | First order reactions |
| B. | Zero order reactions |
| C. | Bimolecular reactions |
| D. | Intra molecular reactions |
| Answer» D. Intra molecular reactions | |
| 9593. |
Epsom salt is [EAMCET 1978, 80; BHU 1979; MP PET 1999; CPMT 1988, 89, 90; Bihar MEE 1996] |
| A. | \[CaS{{O}_{4}}.2{{H}_{2}}O\] |
| B. | \[BaS{{O}_{4}}.2{{H}_{2}}O\] |
| C. | \[MgS{{O}_{4}}.2{{H}_{2}}O\] |
| D. | \[MgS{{O}_{4}}.7{{H}_{2}}O\] |
| Answer» E. | |
| 9594. |
Which of the following ore contains both magnesium and calcium [MDAT Bihar 1984; MP PET 2003] |
| A. | Magnesite |
| B. | Dolomite |
| C. | Carnellite |
| D. | Phosphorite |
| Answer» C. Carnellite | |
| 9595. |
Which of the following is an organo-metallic compound [MP PMT 2001] |
| A. | Lithium ethoxide |
| B. | Ethyl lithium |
| C. | Lithium acetate |
| D. | Lithium carbide |
| Answer» C. Lithium acetate | |
| 9596. |
Ziegler-Natta catalyst is [Pb. CET 2004] |
| A. | \[{{(P{{h}_{3}}P)}_{3}}RhCl\] |
| B. | \[K[PtC{{l}_{3}}({{C}_{2}}{{H}_{4}})]\] |
| C. | \[[A{{l}_{2}}{{({{C}_{2}}{{H}_{6}})}_{6}}]+TiC{{l}_{4}}\] |
| D. | \[[Fe{{({{C}_{2}}{{H}_{5}})}_{2}}]\] |
| Answer» D. \[[Fe{{({{C}_{2}}{{H}_{5}})}_{2}}]\] | |
| 9597. |
Which of the following is a mixed oxide [Pb. CET 2003] |
| A. | \[F{{e}_{2}}{{O}_{3}}\] |
| B. | \[Pb{{O}_{2}}\] |
| C. | \[P{{b}_{3}}{{O}_{4}}\] |
| D. | \[Ba{{O}_{2}}\] |
| Answer» D. \[Ba{{O}_{2}}\] | |
| 9598. |
Which one of the following is correct statement |
| A. | The hydroxide of aluminium is more acidic than that of boron |
| B. | The hydroxide of boron is basic, while that of aluminium is amphoteric |
| C. | The hydroxide of boron is acidic, while that of aluminium is amphoteric |
| D. | The hydroxide of boron and aluminium are amphoteric |
| Answer» D. The hydroxide of boron and aluminium are amphoteric | |
| 9599. |
Mark the false statement [MP PET 1997] |
| A. | A salt bridge is used to eliminate liquid junction potential |
| B. | The Gibbs free energy change, \[\Delta G\] is related with electromotive force \[(E)\], as \[\Delta G=-nFE\] |
| C. | Nernst equation for single electrode potential is \[E={{E}^{o}}-\frac{RT}{nF}\,\ln \,{{a}_{{{M}^{n+}}}}\] |
| D. | The efficiency of a hydrogen oxygen fuel cell is 23% |
| Answer» E. | |
| 9600. |
In the Hoope's process for refining of aluminium, the fused materials form three different layers and they remain separated during electrolysis also. This is because [MP PET 1996] |
| A. | The upper layer is kept attracted by the cathode and the lower layer is kept attracted by the anode |
| B. | There is special arrangement in the cell to keep the layers separate |
| C. | The 3 layers have different densities |
| D. | The 3 layers are maintained at different temperatures |
| Answer» D. The 3 layers are maintained at different temperatures | |