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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.
| 7951. |
Which metal oxide is used to make blue glass |
| A. | \[F{{e}_{2}}{{O}_{3}}\] |
| B. | \[CoO\] |
| C. | \[C{{u}_{2}}O\] |
| D. | \[NiO\] |
| Answer» C. \[C{{u}_{2}}O\] | |
| 7952. |
Energy equivalent to one erg, one joule and one calorie is in the order [NCERT 1980; CPMT 1997] |
| A. | \[1\,erg\,>\,1\,joule\,>\,1\,calorie\] |
| B. | \[1\,erg\,>\,1\,calorie\,>\,1\,joule\] |
| C. | \[1\,calorie\,>\,1\,joule\,>\,1\,erg\] |
| D. | \[1\,joule\,>\,1\,calorie\,>\,1\,erg\] |
| Answer» D. \[1\,joule\,>\,1\,calorie\,>\,1\,erg\] | |
| 7953. |
Which of the following is not used in Friedel-crafts reaction [KCET 2000] |
| A. | Phenyl acetanilide |
| B. | Bromobenzene |
| C. | Benzene |
| D. | Chlorobenzene |
| Answer» B. Bromobenzene | |
| 7954. |
The mass of a photon with a wavelength equal to \[1.54\times {{10}^{-8}}cm\] is [Pb. PMT 2004] |
| A. | \[0.8268\times {{10}^{-34}}kg\] |
| B. | \[1.2876\times {{10}^{-33}}kg\] |
| C. | \[1.4285\times {{10}^{-32}}kg\] |
| D. | \[1.8884\times {{10}^{-32}}kg\] |
| Answer» D. \[1.8884\times {{10}^{-32}}kg\] | |
| 7955. |
The 'phosphoglycerides' occur in |
| A. | The brain and the spinal chord |
| B. | Nails and hairs |
| C. | Oils and fats |
| D. | Waxes |
| Answer» B. Nails and hairs | |
| 7956. |
\[\Delta {{G}^{0}}(HI,\,g)\cong +1.7\,kJ\] . What is the equilibrium constant at \[{{25}^{o}}C\] for \[2HI(g)\] D \[{{H}_{2}}(g)+{{I}_{2}}(g)\] [KCET 1992] |
| A. | 24.0 |
| B. | 3.9 |
| C. | 2.0 |
| D. | 0.5 |
| Answer» E. | |
| 7957. |
During debromination of meso-dibromobutane, the major compound formed is [IIT-JEE 1997] |
| A. | n-butane |
| B. | 1-butane |
| C. | cis-2-butene |
| D. | trans-2-butene |
| Answer» E. | |
| 7958. |
Liquid?liquid sols are known as [CPMT 1999] |
| A. | Aerosols |
| B. | Emulsions |
| C. | Foam |
| D. | Gel |
| Answer» C. Foam | |
| 7959. |
In the reaction \[C{{H}_{3}}CH=C{{H}_{2}}+{{H}_{2}}O+[O]\underset{Acid}{\mathop{\xrightarrow{KMn{{O}_{4}}}}}\,\]\[C{{H}_{3}}-\underset{OH\,\,}{\mathop{\underset{|}{\mathop{C}}\,H}}\,\,-\underset{\,OH\,\,\,\,\,\,}{\mathop{\underset{|}{\mathop{C}}\,{{H}_{2}}}}\,\,\,\xrightarrow{[O]}X+HCOOH\] X is [MP PMT 2002] |
| A. | \[C{{H}_{3}}C{{H}_{2}}COOH\] |
| B. | \[C{{H}_{3}}COOH\] |
| C. | \[C{{H}_{3}}C{{H}_{2}}CHO\] |
| D. | \[C{{H}_{3}}C{{H}_{2}}OH\] |
| Answer» C. \[C{{H}_{3}}C{{H}_{2}}CHO\] | |
| 7960. |
Acidified potassium permanganate solution is decolourised by [MNR 1984] |
| A. | Bleaching powder |
| B. | White vitriol |
| C. | Mohr's salt |
| D. | Microcosmic salt |
| Answer» D. Microcosmic salt | |
| 7961. |
Which one of the following is more acidic [DPMT 2002] |
| A. | Butane |
| B. | 1-butene |
| C. | 1-butyne |
| D. | 2-butyne |
| Answer» E. | |
| 7962. |
The conjugate acid of \[{{H}_{2}}PO_{4}^{-}\] is [MP PET 1990] |
| A. | \[{{H}_{3}}P{{O}_{4}}\] |
| B. | \[{{H}_{2}}PO_{4}^{-}\] |
| C. | \[PO_{4}^{3-}\] |
| D. | \[{{H}_{3}}{{O}^{+}}\] |
| Answer» B. \[{{H}_{2}}PO_{4}^{-}\] | |
| 7963. |
Which of the following is a carbohydrate |
| A. | Leucine |
| B. | Albumin |
| C. | Inulin |
| D. | Maltase |
| Answer» D. Maltase | |
| 7964. |
Which of the following is not correct regarding terylene [Kerala PMT 2004] |
| A. | Step-growth polymer |
| B. | Synthetic fibre |
| C. | Condensation polymer |
| D. | It is also called decron |
| E. | Thermosetting plastic |
| Answer» F. | |
| 7965. |
What is the major product of the following reaction \[C{{H}_{3}}C\equiv C-C{{H}_{2}}-C{{H}_{3}}\xrightarrow{1\,\,\text{mole}\,\,\text{of}\,C{{l}_{2}}}\] [Kerala (Med.) 2003] |
| A. | \[\begin{matrix} CI\,\,\, \\ C{{H}_{3}} \\ \end{matrix}>C=C<\begin{matrix} Cl\,\,\,\,\,\,\,\,\,\,\, \\ C{{H}_{2}}C{{H}_{3}} \\ \end{matrix}\] |
| B. | \[C{{H}_{3}}-C{{H}_{2}}-\underset{\,\,Cl}{\overset{\,Cl}{\mathop{\underset{|}{\overset{|}{\mathop{C}}}\,}}}\,-C{{H}_{2}}C{{H}_{3}}\] |
| C. | \[\begin{matrix} Cl\,\,\, \\ C{{H}_{3}} \\ \end{matrix}>C=C<\begin{matrix} C{{H}_{2}}C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,\,\, \\ Cl\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\ \end{matrix}\] |
| D. | \[C{{H}_{3}}-\underset{\,Cl}{\overset{\,Cl}{\mathop{\underset{|}{\overset{|\,}{\mathop{C}}}\,}}}\,-\underset{\,Cl}{\overset{\,Cl}{\mathop{\underset{|\,}{\overset{\,|\,\,}{\mathop{C\,}}}\,}}}\,-C{{H}_{2}}C{{H}_{3}}\] |
| Answer» E. | |
| 7966. |
Which of the following is a synthetic polymer |
| A. | Rubber |
| B. | Perspex |
| C. | Protein |
| D. | Cellulose |
| Answer» C. Protein | |
| 7967. |
\[R-C{{H}_{2}}-CC{{l}_{2}}-R\xrightarrow{\text{Reagent}}R-C\equiv C-R\] The reagent is [CBSE PMT 1989; MP PET 1995] |
| A. | Na |
| B. | \[HCl\text{ and }{{H}_{2}}O\] |
| C. | \[KOH\text{ in }{{C}_{2}}{{H}_{5}}OH\] |
| D. | Zn |
| Answer» D. Zn | |
| 7968. |
When a solid is converted into liquid, entropy [MP PET 1993, 95; MP PMT 1996] |
| A. | Becomes zero |
| B. | Remains the same |
| C. | Decreases |
| D. | Increases |
| Answer» E. | |
| 7969. |
Carbon black, which is used in making printer's ink, is obtained by decomposition of [MP PET 1993] |
| A. | Acetylene |
| B. | Benzene |
| C. | Carbon tetrachloride |
| D. | Methane |
| Answer» E. | |
| 7970. |
Shortest C-C bond length is present in [BVP 2004] |
| A. | \[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{3}}\] |
| B. | \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}C{{H}_{3}}\] |
| C. | \[C{{H}_{2}}=CH-CH=C{{H}_{2}}\] |
| D. | \[CH\equiv C-C\equiv CH\] |
| Answer» E. | |
| 7971. |
An element has electronic configuration 2, 8, 18, 1. If its atomic weight is 63, then how many neutrons will be present in its nucleus |
| A. | 30 |
| B. | 32 |
| C. | 34 |
| D. | 33 |
| Answer» D. 33 | |
| 7972. |
Colligative properties of a solution depends upon [MP PMT 1994, 2002] |
| A. | Nature of both solvent and solute |
| B. | The relative number of solute and solvent particles |
| C. | Nature of solute only |
| D. | Nature of solvent only |
| Answer» C. Nature of solute only | |
| 7973. |
In the case of auto catalysis [KCET (Med.) 2002] |
| A. | Solvent catalyses |
| B. | Product catalyses |
| C. | Reactant catalyses |
| D. | Heat produced in the reaction catalyses |
| Answer» C. Reactant catalyses | |
| 7974. |
Which of the following dissolves in hot conc. NaOH solution [CPMT 2004] |
| A. | Fe |
| B. | Zn |
| C. | Sn |
| D. | Ag |
| Answer» C. Sn | |
| 7975. |
Cellulose is a polymer of [CBSE PMT 2002] |
| A. | Fructose |
| B. | Ribose |
| C. | Glucose |
| D. | Sucrose |
| Answer» D. Sucrose | |
| 7976. |
Which of the following is true about gaseous state |
| A. | Thermal energy = Molecular attraction |
| B. | Thermal energy >> Molecular attraction |
| C. | Thermal energy << Molecular attraction |
| D. | Molecular forces >> Those in liquids |
| Answer» C. Thermal energy << Molecular attraction | |
| 7977. |
Which is least soluble in water [UPSEAT 1999] |
| A. | \[AgCl\] |
| B. | \[AgF\] |
| C. | \[AgI\] |
| D. | \[A{{g}_{2}}S\] |
| Answer» E. | |
| 7978. |
The product obtained, heating ethanol with conc. \[{{H}_{2}}S{{O}_{4}}\]at \[{{165}^{o}}-{{170}^{o}}\], is [MP PMT 2003] |
| A. | \[{{({{C}_{2}}{{H}_{5}})}_{2}}S{{O}_{4}}\] |
| B. | \[C{{H}_{2}}=C{{H}_{2}}\] |
| C. | \[C{{H}_{3}}COOH\] |
| D. | \[{{C}_{2}}{{H}_{5}}HS{{O}_{4}}\] |
| Answer» C. \[C{{H}_{3}}COOH\] | |
| 7979. |
Iodoethane reacts with sodium in the presence of dry ether. The product is [AFMC 1997; KCET 1998] |
| A. | Pentane |
| B. | Propane |
| C. | Butene |
| D. | Butane |
| Answer» E. | |
| 7980. |
Blue vitriol is [AFMC 1992] |
| A. | \[CuS{{O}_{4}}\] |
| B. | \[CuS{{O}_{4}}.5{{H}_{2}}O\] |
| C. | \[C{{u}_{2}}S{{O}_{4}}\] |
| D. | \[CuS{{O}_{4}}.{{H}_{2}}O\] |
| Answer» C. \[C{{u}_{2}}S{{O}_{4}}\] | |
| 7981. |
Zeigler?Natta catalyst is used for which type of reaction |
| A. | Hydrogenation |
| B. | Polymerization |
| C. | Oxidation |
| D. | Reduction |
| Answer» C. Oxidation | |
| 7982. |
The magnitude of colligative properties in all colloidal dispersions is ?.than solution [AMU 1999] |
| A. | Lower |
| B. | Higher |
| C. | Both |
| D. | None |
| Answer» B. Higher | |
| 7983. |
Nitration of toluene takes place at [NCERT 1990] |
| A. | o-position |
| B. | m-position |
| C. | p-position |
| D. | Both o- and p-positions |
| Answer» E. | |
| 7984. |
Which of the following reaction is expected to readily give a hydrocarbon product in good yields [CBSE PMT 1997] |
| A. | \[RCOOK\xrightarrow{\text{Oxidation Electrolysis}}\] |
| B. | \[RCOOAg\xrightarrow{{{I}_{2}}}\] |
| C. | \[C{{H}_{3}}-C{{H}_{3}}\underset{hv}{\mathop{\xrightarrow{C{{l}_{2}}}}}\,\] |
| D. | \[{{(C{{H}_{3}})}_{2}}CCl\xrightarrow{{{C}_{2}}{{H}_{5}}OH}\] |
| Answer» B. \[RCOOAg\xrightarrow{{{I}_{2}}}\] | |
| 7985. |
Iron is dropped in dil. \[HN{{O}_{3}}\], it gives [DCE 2004] |
| A. | Ferric nitrate |
| B. | Ferric nitrate and \[N{{O}_{2}}\] |
| C. | Ferrous nitrate and ammonium nitrate |
| D. | Ferrous nitrate and nitric oxide |
| Answer» D. Ferrous nitrate and nitric oxide | |
| 7986. |
The marsh gas detector used by miners works on the principle of [AMU 1984] |
| A. | Difference in the rates of diffusion of gases |
| B. | Avogadro's hypothesis |
| C. | Gay-Lussac's law of gaseous volumes |
| D. | Berzelius hypothesis |
| Answer» B. Avogadro's hypothesis | |
| 7987. |
Glucose forms many derivatives. The derivative which will help to prove the furanose structure is [AIIMS 1980; DPMT 1985] |
| A. | Acetyl |
| B. | Benzoyl |
| C. | Osazone |
| D. | Isopropylidene |
| Answer» D. Isopropylidene | |
| 7988. |
Nylon yarns are usually |
| A. | Highly inflammable |
| B. | Non-inflammable |
| C. | Both A and B types are known |
| D. | Uncertain inflammability |
| Answer» D. Uncertain inflammability | |
| 7989. |
Which of the following will have the highest F.P. at one atmosphere [BHU 1982; MP PMT 1987, MP PET/PMT 1988] |
| A. | \[0.1M\,NaCl\] solution |
| B. | \[0.1M\]sugar solution |
| C. | \[0.1M\,BaC{{l}_{2}}\] solution |
| D. | \[0.1M\,FeC{{l}_{3}}\] solution |
| Answer» C. \[0.1M\,BaC{{l}_{2}}\] solution | |
| 7990. |
2.76 g of silver carbonate on being strongly heated yield a residue weighing [Pb. CET 2003] |
| A. | 2.16 g |
| B. | 2.48 g |
| C. | 2.64 g |
| D. | 2.32 g |
| Answer» B. 2.48 g | |
| 7991. |
When 3, 3-dimethyl-2-butanol is heated with \[{{H}_{2}}S{{O}_{4}}\] the major product obtained is [CBSE PMT 1995] |
| A. | cis and trans isomers of 2, 3-dimethyl-2-butene |
| B. | 3, 3-dimethyl-1-butene |
| C. | 2, 3-dimethyl-2-butene |
| D. | 2, 3-dimethyl-1-butene |
| Answer» D. 2, 3-dimethyl-1-butene | |
| 7992. |
The gold number of A, B C and D are 0.04, 0.002, 10 and 25 respectively. Protective power of A, B, C and D are in order [DCE 2003] |
| A. | \[A>B>C>D\] |
| B. | \[B>A>C>D\] |
| C. | \[D>C>B>A\] |
| D. | \[C>A>B>D\] |
| Answer» C. \[D>C>B>A\] | |
| 7993. |
The most important method of preparation of hydrocarbons of lower carbon number is [CBSE PMT 1989] |
| A. | Pyrolysis of higher carbon number hydrocarbons |
| B. | Electrolysis of salts of fatty acids |
| C. | Sabatier and Senderen's reaction |
| D. | Direct synthesis |
| Answer» B. Electrolysis of salts of fatty acids | |
| 7994. |
Nitration of benzene by nitric acid and sulphuric acid is [MNR 1989; CPMT 1990; BCECE 2005] |
| A. | Electrophilic substitution |
| B. | Electrophilic addition |
| C. | Nucleophilic substitution |
| D. | Free radical substitution |
| Answer» B. Electrophilic addition | |
| 7995. |
A device used for the measurement of radioactivity is [BHU 1979] |
| A. | Mass spectrometer |
| B. | Cyclotron |
| C. | Nuclear reactor |
| D. | G.M. counter |
| Answer» E. | |
| 7996. |
Pick out the one which does not belong to the family [KCET 2004] |
| A. | Pepsin |
| B. | Cellulose |
| C. | Ptyalin |
| D. | Lipase |
| Answer» C. Ptyalin | |
| 7997. |
The number of \[\alpha -\]and \[\beta -\]particles emitted when a radioactive element \[_{90}{{E}^{232}}\] changes into \[_{86}{{G}^{220}}\] will be [MP PET 2004] |
| A. | 5 and 4 |
| B. | 2 and 3 |
| C. | 3 and 2 |
| D. | 4 and 1 |
| Answer» D. 4 and 1 | |
| 7998. |
In the extraction of which of the following, complex ion forms [MP PET 1989] |
| A. | \[Cu\] |
| B. | \[Ag\] |
| C. | \[Fe\] |
| D. | \[Na\] |
| Answer» C. \[Fe\] | |
| 7999. |
Red hot iron absorbs \[S{{O}_{2}}\] giving the product [Orrisa JEE 2002] |
| A. | \[FeS+{{O}_{2}}\] |
| B. | \[F{{e}_{2}}{{O}_{3}}+FeS\] |
| C. | \[FeO+FeS\] |
| D. | \[FeO+S\] |
| Answer» D. \[FeO+S\] | |
| 8000. |
The species among the following, which can act as an acid and a base is [AIEEE 2002; KCET 2005] |
| A. | \[HSO_{4}^{-}\] |
| B. | \[SO_{4}^{2-}\] |
| C. | \[{{H}_{3}}{{O}^{+}}\] |
| D. | \[C{{l}^{-}}\] |
| Answer» B. \[SO_{4}^{2-}\] | |