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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.
| 7601. |
Gasoline is a mixture of alkanes with the number of carbon atoms [CPMT 1983, 84; BVP 2003] |
| A. | \[{{C}_{3}}-{{C}_{5}}\] |
| B. | \[{{C}_{5}}-{{C}_{6}}\] |
| C. | \[{{C}_{6}}-{{C}_{8}}\] |
| D. | \[{{C}_{7}}-{{C}_{9}}\] |
| Answer» E. | |
| 7602. |
Which of the following is fully fluorinated polymer [AIEEE 2005] |
| A. | Neoprene |
| B. | Teflon |
| C. | Thiokol |
| D. | PVC |
| Answer» C. Thiokol | |
| 7603. |
Iron obtained from blast furnace is known as [DPMT 1981; CPMT 1988; MP PET 2000] |
| A. | Wrought iron |
| B. | Cast iron |
| C. | Pig iron |
| D. | Steel |
| Answer» D. Steel | |
| 7604. |
When ethene is heated at \[{{400}^{o}}C\] under high pressure, the product is/are |
| A. | Carbon and \[{{H}_{2}}\] |
| B. | Polyethylene |
| C. | Acetylene and \[{{H}_{2}}\] |
| D. | None of these |
| Answer» C. Acetylene and \[{{H}_{2}}\] | |
| 7605. |
The first artificial disintegration of an atomic nucleus was achieved by [Kerala (Engg.) 2002] |
| A. | Geiger |
| B. | Wilson |
| C. | Madame curie |
| D. | Rutherford |
| E. | Soddy |
| Answer» E. Soddy | |
| 7606. |
Which compound has coloured aqueous solution [RPMT 2002] |
| A. | \[Zn{{(N{{O}_{3}})}_{2}}\] |
| B. | \[LiN{{O}_{3}}\] |
| C. | \[Co{{(N{{O}_{3}})}_{2}}\] |
| D. | \[Ba{{(N{{O}_{3}})}_{2}}\] |
| Answer» D. \[Ba{{(N{{O}_{3}})}_{2}}\] | |
| 7607. |
1, 3-butadiene reacts with ethylene to form [BHU 2001] |
| A. | Benzene |
| B. | Cyclohexane |
| C. | Cyclohexene |
| D. | 2, 3 dimethyl butane |
| Answer» D. 2, 3 dimethyl butane | |
| 7608. |
When a catalyst is added to a system the [JIPMER 2000] |
| A. | Value of equilibrium constant is decreased |
| B. | The rate of forward reaction is increased and that of backward reaction is decreased |
| C. | Equilibrium concentrations are unchanged |
| D. | Equilibrium concentrations are increased |
| Answer» D. Equilibrium concentrations are increased | |
| 7609. |
What is the end product which is obtained on the nitration of toluene [MP PMT/PET 1988] |
| A. | o-nitrotoluene |
| B. | p-nitrotoluene |
| C. | 2, 4-dinitrotoluene |
| D. | 2, 4, 6-trinitrotoluene |
| Answer» E. | |
| 7610. |
The solubility of \[Ca{{F}_{2}}\] is a moles/litre. Then its solubility product is ?.. [Orissa JEE 2002] |
| A. | \[{{s}^{2}}\] |
| B. | \[4{{s}^{3}}\] |
| C. | \[3{{s}^{2}}\] |
| D. | \[{{s}^{3}}\] |
| Answer» C. \[3{{s}^{2}}\] | |
| 7611. |
The compound ?A? when treated with \[HN{{O}_{3}}\](in presence of \[{{H}_{2}}S{{O}_{4}}\]) gives compound ?B? which is then reduced with Sn and HCl to aniline. The compound ?A? is [MP PET 2002] |
| A. | Toulene |
| B. | Benzene |
| C. | Ethane |
| D. | Acetamide |
| Answer» C. Ethane | |
| 7612. |
Which of the following compounds does not dissolve in ammonium hydroxide solution |
| A. | \[AgF\] |
| B. | \[AgBr\] |
| C. | \[AgCl\] |
| D. | \[AgI\] |
| Answer» E. | |
| 7613. |
Which of the following is a aldohexose [KCET 2001] |
| A. | Cellulose |
| B. | Sucrose |
| C. | Galactose |
| D. | Raffinose |
| Answer» D. Raffinose | |
| 7614. |
An organic compound answers Molisch's test as well as Benedict's test. But it does not answer Scliwanoff's test. Most probably, it is [KCET 2003] |
| A. | Sucrose |
| B. | Protein |
| C. | Fructose |
| D. | Maltose |
| Answer» E. | |
| 7615. |
Guignet?s green is known as [Kerala PMT 2004] |
| A. | \[C{{r}_{2}}{{O}_{3}}.\ 2{{H}_{2}}O\] |
| B. | \[Fe{{O}_{3}}.2{{H}_{2}}O\] |
| C. | \[C{{u}_{2}}{{O}_{3}}\] |
| D. | \[FeC{{O}_{3}}.C{{r}_{2}}{{O}_{3}}\] |
| E. | \[FeO\ .\ C{{r}_{2}}{{O}_{3}}\] |
| Answer» B. \[Fe{{O}_{3}}.2{{H}_{2}}O\] | |
| 7616. |
Which is the correct alternate for hydrolysis constant of \[N{{H}_{4}}CN\] [CBSE PMT 1989] |
| A. | \[\sqrt{\frac{{{K}_{w}}}{{{K}_{a}}}}\] |
| B. | \[\frac{{{K}_{w}}}{{{K}_{a}}\times {{K}_{b}}}\] |
| C. | \[\sqrt{\frac{{{K}_{b}}}{c}}\] |
| D. | \[\frac{{{K}_{a}}}{{{K}_{b}}}\] |
| Answer» C. \[\sqrt{\frac{{{K}_{b}}}{c}}\] | |
| 7617. |
Heat require to raise the temperature of 1 mol of a substance by \[{{1}^{o}}C\] is called [DCE 2002] |
| A. | Specific heat |
| B. | Molar heat capacity |
| C. | Water equivalent |
| D. | Specific gravity |
| Answer» C. Water equivalent | |
| 7618. |
Which of the following is an aldohexose [KCET (Engg.) 2001] |
| A. | Cellulose |
| B. | Sucrose |
| C. | Glucose |
| D. | Raffinose |
| Answer» D. Raffinose | |
| 7619. |
The positive charge of an atom is [AFMC 2002] |
| A. | Spread all over the atom |
| B. | Distributed around the nucleus |
| C. | Concentrated at the nucleus |
| D. | All of these |
| Answer» D. All of these | |
| 7620. |
The Van?t Hoff factor calculated from association data is always...than calculated from dissociation data [JIPMER 2000] |
| A. | Less |
| B. | More |
| C. | Same |
| D. | More or less |
| Answer» B. More | |
| 7621. |
Products of the following reaction \[C{{H}_{3}}C\equiv \,C\,C{{H}_{2}}C{{H}_{3}}\overset{(1)\ \ {{O}_{3}}}{\mathop{\xrightarrow[(2)\ Hydrolysis]{}}}\,\]....... are [CBSE PMT 2005] |
| A. | \[C{{H}_{3}}CHO+C{{H}_{3}}C{{H}_{2}}CHO\] |
| B. | \[C{{H}_{3}}COOH+C{{H}_{3}}C{{H}_{2}}CHO\] |
| C. | \[C{{H}_{3}}COOH+HOOCC{{H}_{2}}C{{H}_{3}}\] |
| D. | \[C{{H}_{3}}COOH+C{{O}_{2}}\] |
| Answer» D. \[C{{H}_{3}}COOH+C{{O}_{2}}\] | |
| 7622. |
Which one of the following statements is not correct about the three states of matter i.e. solid, liquid and gaseous |
| A. | Molecules of a solid possess least energy whereas those of a gas possess highest energy |
| B. | The density of solid is highest whereas that of gases is lowest |
| C. | Gases like liquids possess definite volumes |
| D. | Molecules of a solid possess vibratory motion |
| Answer» D. Molecules of a solid possess vibratory motion | |
| 7623. |
Molybdenum compounds are used in |
| A. | Dye industry |
| B. | For colouring leather |
| C. | For colouring rubber |
| D. | All of these |
| Answer» E. | |
| 7624. |
The huge amount of energy which is released during atomic fission is due to [CPMT 1990] |
| A. | Loss of mass |
| B. | Loss of electrons |
| C. | Loss of protons |
| D. | Loss of \[\alpha \]-particles |
| Answer» B. Loss of electrons | |
| 7625. |
The substance added in water in the froth floatation process is [EAMCET 1980] |
| A. | Soap powder |
| B. | Pine oil |
| C. | Coconut oil |
| D. | None of the above |
| Answer» C. Coconut oil | |
| 7626. |
The equivalent weight of potassium permanganate for acid solution is [MP PET 1999] |
| A. | 158 |
| B. | 31.6 |
| C. | 52.16 |
| D. | 79 |
| Answer» C. 52.16 | |
| 7627. |
Which one is a mixed salt [DPMT 1985] |
| A. | \[NaHS{{O}_{4}}\] |
| B. | \[NaKS{{O}_{4}}\] |
| C. | \[{{K}_{4}}Fe{{(CN)}_{6}}\] |
| D. | \[Mg(OH)Cl\] |
| Answer» C. \[{{K}_{4}}Fe{{(CN)}_{6}}\] | |
| 7628. |
The tendency of an electrode to lose electrons is known as [J & K 2005] |
| A. | Electrode potential |
| B. | Reduction potential |
| C. | Oxidation potential |
| D. | e.m.f. |
| Answer» D. e.m.f. | |
| 7629. |
The product(s) obtained via oxymercuration \[(HgS{{O}_{4}}+{{H}_{2}}S{{O}_{4}})\] of 1-butyne would be [IIT-JEE 1999] |
| A. | \[\overset{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,O}{\mathop{\overset{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||}{\mathop{C{{H}_{3}}-C{{H}_{2}}-C-C{{H}_{3}}}}\,}}\,\] |
| B. | \[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-CHO\] |
| C. | \[C{{H}_{3}}-C{{H}_{2}}-CHO+HCHO\] |
| D. | \[C{{H}_{3}}C{{H}_{2}}COOH+HCOOH\] |
| Answer» B. \[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-CHO\] | |
| 7630. |
When conc. sulphuric acid is added slowly to a solution of ferrous sulphate containing nitrate ion, a brown colour ring is formed. The composition of the ring is [CPMT 1989] |
| A. | \[[Fe{{({{H}_{2}}O)}_{5}}NO]S{{O}_{4}}\] |
| B. | \[FeS{{O}_{4}}.N{{O}_{2}}\] |
| C. | \[Fe[{{({{H}_{2}}O)}_{5}}]{{(N{{O}_{3}})}_{2}}\] |
| D. | None of these |
| Answer» B. \[FeS{{O}_{4}}.N{{O}_{2}}\] | |
| 7631. |
\[Fe{{(OH)}_{3}}\] when treated with \[FeC{{l}_{3}}\] solution a reddish-brown solution is formed. The process involved is [AFMC 1982] |
| A. | Dispersion |
| B. | Exchange of solvent |
| C. | Peptization |
| D. | None of these |
| Answer» D. None of these | |
| 7632. |
Which represents an alkane [CPMT 1976] |
| A. | \[{{C}_{5}}{{H}_{8}}\] |
| B. | \[{{C}_{8}}{{H}_{6}}\] |
| C. | \[{{C}_{9}}{{H}_{10}}\] |
| D. | \[{{C}_{7}}{{H}_{16}}\] |
| Answer» E. | |
| 7633. |
If acetic acid mixed with sodium acetate, then \[{{H}^{+}}\]ion concentration will be [Roorkee 1995] |
| A. | Increased |
| B. | Decreased |
| C. | Remains unchanged |
| D. | \[pH\]Decreased |
| Answer» C. Remains unchanged | |
| 7634. |
Hybridisation state of C in diamond is [RPMT 2002] |
| A. | \[sp\] |
| B. | \[s{{p}^{2}}\] |
| C. | \[s{{p}^{3}}\] |
| D. | \[s{{p}^{3}}d\] |
| Answer» D. \[s{{p}^{3}}d\] | |
| 7635. |
Methane and ethane both can be prepared in one step by which of the following compound [BHU 2004] |
| A. | \[{{C}_{2}}{{H}_{4}}\] |
| B. | \[C{{H}_{3}}O\] |
| C. | \[C{{H}_{3}}Br\] |
| D. | \[C{{H}_{3}}C{{H}_{2}}OH\] |
| Answer» D. \[C{{H}_{3}}C{{H}_{2}}OH\] | |
| 7636. |
Benzene vapour mixed with air when passed over \[{{V}_{2}}{{O}_{5}}\] catalyst at \[775K\] gives [AFMC 1991; CPMT 2001; MP PMT 2003] |
| A. | Glyoxal |
| B. | Oxalic acid |
| C. | Maleic anhydride |
| D. | Fumaric acid |
| Answer» D. Fumaric acid | |
| 7637. |
In chemical scale, the relative mass of the isotopic mixture of oxygen atoms \[({{O}^{16}},\,{{O}^{17}},\,{{O}^{18}})\] is assumed to be equal to [Bihar MADT 1981] |
| A. | 16.002 |
| B. | 16.00 |
| C. | 17.00 |
| D. | 11.00 |
| Answer» C. 17.00 | |
| 7638. |
9.0 gm of \[{{H}_{2}}O\] is vaporised at \[{{100}^{o}}C\] and 1 atm pressure. If the latent heat of vaporisation of water is \[x\,J/gm\], then \[\Delta S\] is given by |
| A. | \[\frac{x}{373}\] |
| B. | \[\frac{18x}{100}\] |
| C. | \[\frac{18x}{373}\] |
| D. | \[\frac{1}{2}\times \frac{18x}{373}\] |
| Answer» E. | |
| 7639. |
Turnbull's blue is [Bihar CEE 1995] |
| A. | Ferricyanide |
| B. | Ferrous ferricyanide |
| C. | Ferrous cyanide |
| D. | Ferri-ferrocyanide |
| Answer» C. Ferrous cyanide | |
| 7640. |
The number of \[\sigma \] and \[\pi \] bonds in a molecule of benzene is [MP PMT/PET 1988; BHU 1995; CPMT 1997] |
| A. | \[6\sigma \text{ and }9\pi \] |
| B. | \[9\sigma \text{ and }3\pi \] |
| C. | \[12\sigma \text{ and }3\pi \] |
| D. | \[6\sigma \text{ and }6\pi \] |
| Answer» D. \[6\sigma \text{ and }6\pi \] | |
| 7641. |
Why are strong acids generally used as standard solutions in acid-base titrations [Pb. PMT 1998] |
| A. | The \[pH\] at the equivalence point will always be 7 |
| B. | They can be used to titrate both strong and weak bases |
| C. | Strong acids form more stable solutions than weak acids |
| D. | The salts of strong acids do not hydrolysed |
| Answer» C. Strong acids form more stable solutions than weak acids | |
| 7642. |
Which is a natural colloidal [DPMT 1985] |
| A. | Sodium chloride |
| B. | Urea |
| C. | Canesugar |
| D. | Blood |
| Answer» E. | |
| 7643. |
The atomic weight of an element is double its atomic number. If there are four electrons in \[2p\] orbital, the element is [AMU 1983] |
| A. | \[C\] |
| B. | \[N\] |
| C. | \[O\] |
| D. | \[Ca\] |
| Answer» D. \[Ca\] | |
| 7644. |
Paris green is |
| A. | Double salt of copper carbonate and copper nitrate |
| B. | Double salt of copper acetate and copper arsinite |
| C. | Double salt of copper acetate and copper sulphate |
| D. | Double salt of copper and silver nitrate |
| Answer» C. Double salt of copper acetate and copper sulphate | |
| 7645. |
Petroleum refining is [AIIMS 1996; KCET 2004] |
| A. | Distillation of petroleum to get different fractions |
| B. | Obtaining aromatic compounds from aliphatic compounds present in petroleum |
| C. | Cracking of petroleum to get gaseous hydrocarbons |
| D. | Purification of petroleum |
| Answer» B. Obtaining aromatic compounds from aliphatic compounds present in petroleum | |
| 7646. |
The most stable ion is [AIEEE 2002] |
| A. | \[{{[Fe{{(OH)}_{3}}]}^{3-}}\] |
| B. | \[{{[Fe{{(Cl)}_{6}}]}^{3-}}\] |
| C. | \[{{[Fe{{(CN)}_{6}}]}^{3-}}\] |
| D. | \[{{[Fe{{({{H}_{2}}O)}_{6}}]}^{3+}}\] |
| Answer» E. | |
| 7647. |
\[KMn{{O}_{4}}\] will oxidise acetylene to [CPMT 1999] |
| A. | Ethylene glycol |
| B. | Ethyl alcohol |
| C. | Oxalic acid |
| D. | Acetic acid |
| Answer» D. Acetic acid | |
| 7648. |
Arrhenius equation is |
| A. | \[\frac{d\,\ln \,K}{dT}=\Delta {{E}^{*}}/RT\] |
| B. | \[\frac{d\,\ln \,K}{dT}=\Delta {{E}^{*}}/R{{T}^{2}}\] |
| C. | \[\frac{d\,\ln \,K}{dT}=-\Delta {{E}^{*}}/R{{T}^{2}}\] |
| D. | \[\frac{d\,\ln \,K}{dT}=-\Delta {{E}^{*}}/RT\] |
| Answer» C. \[\frac{d\,\ln \,K}{dT}=-\Delta {{E}^{*}}/R{{T}^{2}}\] | |
| 7649. |
Which of the following is weakly acidic |
| A. | \[C{{H}_{2}}=C{{H}_{2}}\] |
| B. | \[{{C}_{6}}{{H}_{6}}\] |
| C. | \[C{{H}_{3}}-C\equiv CH\] |
| D. | \[C{{H}_{3}}-C\equiv C-C{{H}_{ 3}}\] |
| Answer» E. | |
| 7650. |
Number of moles of \[KMn{{O}_{4}}\]required to oxidize one mole of \[Fe({{C}_{2}}{{O}_{4}})\]in acidic medium is [Haryana CEE 1996] |
| A. | 0.6 |
| B. | 0.167 |
| C. | 0.2 |
| D. | 0.4 |
| Answer» B. 0.167 | |