MCQOPTIONS
Saved Bookmarks
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.
| 9651. |
Conductivity (unit Siemen?s) is directly proportional to area of the vessel and the concentration of the solution in it and is inversely proportional to the length of the vessel then the unit of the constant of proportionality is [AIEEE 2002] |
| A. | \[Sm\,\,mo{{l}^{-1}}\] |
| B. | \[S{{m}^{2}}\,\,mo{{l}^{-1}}\] |
| C. | \[{{S}^{-2}}{{m}^{2}}\,\,mo{{l}^{{}}}\] |
| D. | \[{{S}^{2}}{{m}^{2}}\,\,mo{{l}^{-2}}\] |
| Answer» C. \[{{S}^{-2}}{{m}^{2}}\,\,mo{{l}^{{}}}\] | |
| 9652. |
50 ml of 1 M oxalic acid is shaken with 0.5 gm of wood charcoal. The final concentration of the solution after adsorption is 0.5 M. Amount of oxalic acid absorbed per gm of charcoal is [MP PET 2004] |
| A. | 3.45 gm |
| B. | 3.15 gm |
| C. | 6.30 gm |
| D. | None |
| Answer» D. None | |
| 9653. |
Iron is extracted from magnetite by reduction with [UPSEAT 2001] |
| A. | \[{{H}_{2}}\] |
| B. | C |
| C. | Mg |
| D. | Al |
| Answer» C. Mg | |
| 9654. |
The reagent commonly used to determine hardness of water titrimetrically is [AIIMS 2003] |
| A. | Oxalic acid |
| B. | Disodium salt of EDTA |
| C. | Sodium citrate |
| D. | Sodium thiosulphate |
| Answer» C. Sodium citrate | |
| 9655. |
Entropy is maximum in case of [BVP 2004] |
| A. | Steam |
| B. | Water at \[{{0}^{o}}C\] |
| C. | Water at \[{{4}^{o}}C\] |
| D. | Ice |
| Answer» B. Water at \[{{0}^{o}}C\] | |
| 9656. |
The efficiency of an enzyme in catalysing a reaction is due to its capacity [NCERT 1982] |
| A. | To form a strong enzyme-substrate complex |
| B. | To decrease the bond energies of substrate molecule |
| C. | To change the shape of the substrate molecule |
| D. | To lower the activation energy of the reaction |
| Answer» E. | |
| 9657. |
Which of the following is not an emulsion [MP PET 2003] |
| A. | Butter |
| B. | Ice cream |
| C. | Milk |
| D. | Cloud |
| Answer» E. | |
| 9658. |
Heavy water is used as [Bihar MEE 1996; UPSEAT 1999, 2000, 02] |
| A. | Control rods |
| B. | Moderator |
| C. | Fuel |
| D. | Coolant |
| E. | None of these |
| Answer» C. Fuel | |
| 9659. |
Maximum coagulation power is in [MP PET 1989, 90] |
| A. | \[N{{a}^{+}}\] |
| B. | \[B{{a}^{++}}\] |
| C. | \[A{{l}^{+++}}\] |
| D. | \[S{{n}^{++++}}\] |
| Answer» E. | |
| 9660. |
Carbide, which react with water to give propyne is [Kerala CET 2005] |
| A. | \[Ca{{C}_{2}}\] |
| B. | \[SiC\] |
| C. | \[M{{g}_{2}}{{C}_{3}}\] |
| D. | \[A{{l}_{4}}{{C}_{3}}\] |
| E. | \[B{{e}_{2}}C\] |
| Answer» D. \[A{{l}_{4}}{{C}_{3}}\] | |
| 9661. |
\[{{K}_{sp}}\]for sodium chloride is \[36\,\,mo{{l}^{2}}/litr{{e}^{2}}.\] The solubility of sodium chloride is [BHU 1981] |
| A. | \[\frac{1}{36}\] |
| B. | \[\frac{1}{6}\] |
| C. | 6 |
| D. | 3600 |
| Answer» D. 3600 | |
| 9662. |
If \[\alpha \] is the degree of dissociation of \[N{{a}_{2}}S{{O}_{4}}\], the Vant Hoff's factor (i) used for calculating the molecular mass is [AIEEE 2005] |
| A. | \[1+\alpha \] |
| B. | \[1-\alpha \] |
| C. | \[1+2\alpha \] |
| D. | \[1-2\alpha \] |
| Answer» D. \[1-2\alpha \] | |
| 9663. |
Necessary conditions for halogenation are [CPMT 1976] |
| A. | Cold and dark |
| B. | Presence of halogen carrier |
| C. | Both A and B |
| D. | None |
| Answer» D. None | |
| 9664. |
Lucas reagent is [CPMT 1980; AIIMS 1980, 82; DPMT 1983; MP PET 1995; MP PMT 1997, 98] |
| A. | Anhydrous \[ZnC{{l}_{2}}+conc.\,HCl\] |
| B. | Hydrous \[ZnC{{l}_{2}}+dil.\,HCl\] |
| C. | Conc. \[HN{{O}_{3}}+\] anhydrous \[ZnC{{l}_{2}}\] |
| D. | Conc. \[HN{{O}_{3}}+\] anhydrous \[MgC{{l}_{2}}\] |
| Answer» B. Hydrous \[ZnC{{l}_{2}}+dil.\,HCl\] | |
| 9665. |
In which of these processes platinum is used as a catalyst [DCE 2004] |
| A. | Oxidation of ammonia to form \[HN{{O}_{3}}\] |
| B. | Hardening of oils |
| C. | Production of synthetic rubber |
| D. | Synthesis of methanol |
| Answer» B. Hardening of oils | |
| 9666. |
At \[{{90}^{o}}C\] pure water has \[[{{H}_{3}}{{O}^{+}}]={{10}^{-6}}\,M,\] the value of \[{{K}_{w}}\] at this temperature will be [IIT 1981; MNR 1990; CBSE PMT 1993; UPSEAT 1999] |
| A. | \[{{10}^{-6}}\] |
| B. | \[{{10}^{-12}}\] |
| C. | \[{{10}^{-14}}\] |
| D. | \[{{10}^{-8}}\] |
| Answer» C. \[{{10}^{-14}}\] | |
| 9667. |
Which of the following alkaline earth metals shows some properties similar to aluminium [BHU 1983] |
| A. | \[Be\] |
| B. | \[Ca\] |
| C. | \[Sr\] |
| D. | \[Ba\] |
| Answer» B. \[Ca\] | |
| 9668. |
Which of the following substances is not used for preparing lyophilic sols [MP PET 2002] |
| A. | Starch |
| B. | Gum |
| C. | Gelatin |
| D. | Metal sulphide |
| Answer» E. | |
| 9669. |
Sodium sulphate is soluble in water whereas barium sulphate is sparingly soluble because [IITJEE 1989] |
| A. | The hydration energy of \[N{{a}_{2}}S{{O}_{4}}\] is less than its lattice energy |
| B. | The hydration energy of \[N{{a}_{2}}S{{O}_{4}}\] is more than its lattice energy |
| C. | The lattice energy of \[BaS{{O}_{4}}\] is more than its hydration energy |
| D. | The lattice energy has no role to play in solubility |
| Answer» D. The lattice energy has no role to play in solubility | |
| 9670. |
Which of the following ions forms highly soluble hydroxide in water [CPMT 1974, 76, 79, 82] |
| A. | \[{{K}^{+}}\] |
| B. | \[Z{{n}^{++}}\] |
| C. | \[A{{l}^{+++}}\] |
| D. | \[C{{a}^{++}}\] |
| Answer» B. \[Z{{n}^{++}}\] | |
| 9671. |
Aromatic compounds burn with sooty flame because [BIT 1991] |
| A. | They have a ring structure of carbon atoms |
| B. | They have a relatively high percentage of hydrogen |
| C. | They have a relatively high percentage of carbon |
| D. | They resist reaction with oxygen of air |
| Answer» D. They resist reaction with oxygen of air | |
| 9672. |
In balancing the half reaction \[{{S}_{2}}O_{3}^{2-}\to {{S}_{(s)}}\] the number of electrons that must be added is [DPMT 2000] |
| A. | 4 on the left |
| B. | 3 on the right |
| C. | 2 on the left |
| D. | 2 on the right |
| Answer» B. 3 on the right | |
| 9673. |
Which of the following statement is correct regarding alkali metals [NCERT 1981] |
| A. | Cation is less stable than the atom |
| B. | Cation is smaller than the atom |
| C. | Size of cation and atom is the same |
| D. | Cation is greater in size than the atom |
| Answer» C. Size of cation and atom is the same | |
| 9674. |
IUPAC name of \[C{{H}_{3}}-\underset{C{{H}_{3}}}{\mathop{\underset{|\,\,\,\,\,\,\,}{\mathop{CH}}\,}}\,-C{{H}_{2}}-\underset{CN\,}{\mathop{\underset{|\,\,\,\,\,\,}{\mathop{CH}}\,}}\,-C{{H}_{3}}\] [AIIMS 2002] |
| A. | 2-cyno, 3-methyl, hexane |
| B. | 3-methyl, 5-cyanohexane |
| C. | 2-4 dimethyl, cyanopentane |
| D. | 2-cyno, 3-methylhexane |
| Answer» D. 2-cyno, 3-methylhexane | |
| 9675. |
The IUPAC name of compound ( ) is [Kerala CET 2005] |
| A. | (2Z, 4Z) -2, 4-hexa di-ene |
| B. | (2Z, 4E)-2, 4 hexa di ene |
| C. | (4Z, 4Z)-2, 4 hexa di ene |
| D. | (2E, 4Z)-2, 4 hexa di ene |
| E. | (2E, 4E)-2, 4 hexa di ene |
| Answer» F. | |
| 9676. |
Indicate the organic structure for the product expected when 2-methyl propene is heated with acetyl chloride in presence of anhydrous zinc chloride [CBSE PMT 1989] |
| A. | \[\underset{Cl\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\overset{C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\overset{\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{C{{H}_{3}}-C-C{{H}_{2}}-CO-C{{H}_{3}}}}\,}}\,}}\,}}\,\] |
| B. | \[\underset{C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\overset{H\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\overset{\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{C{{H}_{3}}-C-C{{H}_{2}}-CO-C{{H}_{3}}}}\,}}\,}}\,}}\,\] |
| C. | \[\overset{\,\,O}{\mathop{\overset{\,||}{\mathop{C{{H}_{3}}-C-O-C}}\,}}\,<-\begin{matrix} Me \\ Me \\ Me \\ \end{matrix}\] |
| D. | \[C{{H}_{3}}-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-\overset{C{{H}_{3}}}{\mathop{\overset{|\,\,\,\,\,\,\,}{\mathop{C=}}\,}}\,C{{H}_{2}}\] |
| Answer» B. \[\underset{C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\overset{H\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\overset{\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{C{{H}_{3}}-C-C{{H}_{2}}-CO-C{{H}_{3}}}}\,}}\,}}\,}}\,\] | |
| 9677. |
Which of the following statement about LiCl and \[NaCl\] is correct [Kurukshetra CEE 2002] |
| A. | LiCl has higher melting point than NaCl |
| B. | LiCl dissolves in water whereas NaCl does not |
| C. | LiCl would ionize in water more than NaCl |
| D. | Fused LiCl would be less conducting than fused NaCl |
| Answer» E. | |
| 9678. |
Alkali metals are strong reducing because |
| A. | These are monovalent |
| B. | Their ionisation potential are very high |
| C. | Their standard electrode potential are very much negative |
| D. | These are metals |
| Answer» D. These are metals | |
| 9679. |
The commercial production of sodium carbonate is done by [CPMT 1982; MP PMT 1996] |
| A. | Lead-chamber process |
| B. | Haber's process |
| C. | Solvay's process |
| D. | Castner's process |
| Answer» D. Castner's process | |
| 9680. |
In an element going away from nucleus, the energy of particle [RPMT 1997] |
| A. | Decreases |
| B. | Not changing |
| C. | Increases |
| D. | None of these |
| Answer» D. None of these | |
| 9681. |
IUPAC name of \[C{{H}_{3}}CH(OH)C{{H}_{2}}C{{H}_{2}}COOH\] is [MP PET 1990] |
| A. | 4-hydroxy pentanoic acid |
| B. | 1-carboxy-3-butanoic acid |
| C. | 1-carboxy-4-butanol |
| D. | 4-carboxy-2-butanol |
| Answer» B. 1-carboxy-3-butanoic acid | |
| 9682. |
IUPAC name of \[C{{H}_{3}}-O-{{C}_{2}}{{H}_{5}}\] is [MNR 1986; MP PET 2000] |
| A. | Ethoxymethane |
| B. | Methoxyethane |
| C. | Methylethyl ether |
| D. | Ethylmethyl ether |
| Answer» C. Methylethyl ether | |
| 9683. |
Ionic product of water increases, if [AMU 1983; MP PET 1986; MP PET/PMT 1988; JIPMER 2002] |
| A. | Pressure is reduced |
| B. | \[{{H}^{+}}\]is added |
| C. | \[O{{H}^{-}}\]is added |
| D. | Temperature increases |
| Answer» E. | |
| 9684. |
The process which is catalysed by one of the products is called [MP PET 1999; AIIMS 2000; J & K 2005] |
| A. | Acid-base catalysis |
| B. | Autocatalysis |
| C. | Negative catalysis |
| D. | None of these |
| Answer» C. Negative catalysis | |
| 9685. |
0.2595g of an organic substance in a quantitative analysis yielded 0.35 g of the barium sulphate. The percentage of sulphur in the substance is [CPMT 2000; AFMC 2001; Pb. CET 2000] |
| A. | 18.52g |
| B. | 182.2 g |
| C. | 17. 5 g |
| D. | 175.2g |
| Answer» B. 182.2 g | |
| 9686. |
Which of the following reacts with water with high rate [AFMC 1995] |
| A. | \[Li\] |
| B. | \[K\] |
| C. | \[Na\] |
| D. | \[Rb\] |
| Answer» E. | |
| 9687. |
The bond length between the hybridised carbon atom and other carbon atom is minimum in [Pb. PMT 2000] |
| A. | Butane |
| B. | Propyne |
| C. | Propene |
| D. | Propane |
| Answer» C. Propene | |
| 9688. |
Name the hydrocarbon that is a liquid at STP |
| A. | Ethane |
| B. | Propane |
| C. | n-butane |
| D. | n-pentane |
| Answer» E. | |
| 9689. |
The components of Zigler Natta catalyst, used in the polymerisation of propylene, are [MP PMT 2003] |
| A. | \[TiC{{l}_{3}}+Al{{({{C}_{2}}{{H}_{5}})}_{3}}\] |
| B. | \[TiC{{l}_{4}}+Al{{({{C}_{2}}{{H}_{5}})}_{3}}\] |
| C. | \[Ti{{({{C}_{2}}{{H}_{5}})}_{3}}+AlC{{l}_{3}}\] |
| D. | \[Ti{{({{C}_{2}}{{H}_{5}})}_{4}}+AlC{{l}_{3}}\] |
| Answer» C. \[Ti{{({{C}_{2}}{{H}_{5}})}_{3}}+AlC{{l}_{3}}\] | |
| 9690. |
\[{{K}_{2}}C{{S}_{3}}\] can be called potassium [CPMT 1972, 74] |
| A. | Thiocyanate |
| B. | Thiocarbonate |
| C. | Thiocarbide |
| D. | Sulphocyanide |
| Answer» C. Thiocarbide | |
| 9691. |
Which of the following does not show any reducing test of aldehyde [CPMT 1996; Orissa JEE 2004] |
| A. | Sucrose |
| B. | Fructose |
| C. | Maltose |
| D. | Lactose |
| Answer» B. Fructose | |
| 9692. |
The compound insoluble in acetic acid is [IIT 1986] |
| A. | Calcium oxide |
| B. | Calcium carbonate |
| C. | Calcium oxalate |
| D. | Calcium hydroxide |
| Answer» D. Calcium hydroxide | |
| 9693. |
Among \[K,\ Ca,\ Fe,\]and \[Zn\], the element which can form more than one binary compound with chlorine is [CBSE PMT 2004] |
| A. | K |
| B. | Ca |
| C. | Fe |
| D. | Zn |
| Answer» D. Zn | |
| 9694. |
According to Werner's theory [MP PMT 2000, 02] |
| A. | Primary valency can be ionized |
| B. | Secondary valency can be ionized |
| C. | Primary and secondary valencies both cannot be ionized |
| D. | Only primary valency cannot be ionized |
| Answer» B. Secondary valency can be ionized | |
| 9695. |
Gold number is related with [MP PET 2000] |
| A. | Colloids |
| B. | Radioactivity |
| C. | Gas equation |
| D. | Kinetic energy |
| Answer» B. Radioactivity | |
| 9696. |
When \[CuS{{O}_{4}}\] solution is added to\[{{K}_{4}}[Fe{{(CN)}_{6}}]\], the formula of the product formed is [Bihar CEE 1995] |
| A. | \[C{{u}_{2}}Fe{{(CN)}_{6}}\] |
| B. | \[KCN\] |
| C. | \[Cu{{(CN)}_{3}}\] |
| D. | \[Cu{{(CN)}_{2}}\] |
| Answer» B. \[KCN\] | |
| 9697. |
Size of colloidal particles varies from [CPMT 1982, 90, 93, 97; CBSE PMT 1996; MP PMT 1995; AIIMS 2002; KCET 2004] |
| A. | \[{{10}^{-7}}\] to \[{{10}^{-9}}\,m\] |
| B. | \[{{10}^{-9}}\] to \[{{10}^{-17}}\,m\] |
| C. | \[{{10}^{-5}}\] to \[{{10}^{-7}}\,m\] |
| D. | \[{{10}^{-4}}\] to \[{{10}^{-10}}\,m\] |
| Answer» B. \[{{10}^{-9}}\] to \[{{10}^{-17}}\,m\] | |
| 9698. |
Energy of electron of hydrogen atom in second Bohr orbit is [MP PMT 2000] |
| A. | \[-5.44\times {{10}^{-19}}J\] |
| B. | \[-5.44\times {{10}^{-19}}\,kJ\] |
| C. | \[-5.44\times {{10}^{-19}}\,cal\] |
| D. | \[-5.44\times {{10}^{-19}}\,eV\] |
| Answer» B. \[-5.44\times {{10}^{-19}}\,kJ\] | |
| 9699. |
When sugar is added to a colloidal solution it brings about |
| A. | Ionization |
| B. | Coagulation |
| C. | Peptization |
| D. | None of these |
| Answer» E. | |
| 9700. |
The solubility of silver chromate in 0.01 M \[{{K}_{2}}Cr{{O}_{4}}\] is \[2\times {{10}^{-8}}mol\,d{{m}^{-3}}\]. The solubility product of silver chromate will be [MH CET 2000] |
| A. | \[8\times {{10}^{-24}}\] |
| B. | \[16\times {{10}^{-24}}\] |
| C. | \[1.6\times {{10}^{-18}}\] |
| D. | \[16\times {{10}^{-18}}\] |
| Answer» E. | |