MCQOPTIONS
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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.
| 8801. |
The observed osmotic pressure of a solution of benzoic acid in benzene is less than its expected value because [CET Pune 1998] |
| A. | Benzene is a non-polar solvent |
| B. | Benzoic acid molecules are associated in benzene |
| C. | Benzoic acid molecules are dissociated in benzene |
| D. | Benzoic acid is an organic compound |
| Answer» C. Benzoic acid molecules are dissociated in benzene | |
| 8802. |
The chemical reaction, \[2AgCl(s)+{{H}_{2}}(g)\ \to \] \[2HCl(aq)+2Ag(s)\] taking place in a galvanic cell is represented by the notation [AIIMS 2005] |
| A. | \[Pt|{{H}_{2}}(g),1\text{bar }\!\!|\!\!\text{ 1}M\ KCl(aq)|AgCl(s)|Ag(s)\] |
| B. | \[Pt(s)|{{H}_{2}}(g),\ 1\text{bar }\!\!|\!\!\text{ }\ 1M\ HCl(aq)||1M\ A{{g}^{+}}(aq)|Ag(s)\] |
| C. | \[Pt(s)|{{H}_{2}}(g),\ 1\text{bar }\!\!|\!\!\text{ }\ 1M\ HCl(aq)|AgCl(s)|Ag(s)\] |
| D. | \[Pt(s)|{{H}_{2}}(g),\ 1\text{bar }\!\!|\!\!\text{ }\ 1M\ HCl(aq)|Ag(s)|AgCl(s)\] |
| Answer» C. \[Pt(s)|{{H}_{2}}(g),\ 1\text{bar }\!\!|\!\!\text{ }\ 1M\ HCl(aq)|AgCl(s)|Ag(s)\] | |
| 8803. |
Ores like magnetite or tungstates in tin ores are concentrated by |
| A. | Froth floatation |
| B. | Magnetic separation |
| C. | Gravity separation |
| D. | Electrostatic separation |
| Answer» C. Gravity separation | |
| 8804. |
Which one of the following nitrates will leave behind a metal on strong heating [AIEEE 2003] |
| A. | Ferric nitrate |
| B. | Copper nitrate |
| C. | Manganese nitrate |
| D. | Silver nitrate |
| Answer» E. | |
| 8805. |
Hydrolysis of sodium acetate will give [MNR 1978] |
| A. | Acidic solution |
| B. | Basic solution |
| C. | Neutral solution |
| D. | Normal solution |
| Answer» C. Neutral solution | |
| 8806. |
Empirical formula of a compound is \[{{C}_{2}}{{H}_{5}}O\] and its molecular weight is 90. Molecular formula of the compound is [NCERT 1971] |
| A. | \[{{C}_{2}}{{H}_{5}}O\] |
| B. | \[{{C}_{3}}{{H}_{6}}{{O}_{3}}\] |
| C. | \[{{C}_{4}}{{H}_{10}}{{O}_{2}}\] |
| D. | \[{{C}_{5}}{{H}_{14}}O\] |
| Answer» D. \[{{C}_{5}}{{H}_{14}}O\] | |
| 8807. |
Bauxite containing impurities of iron oxide is purified by [CPMT 1987; AIIMS 1998] |
| A. | Hoop's process |
| B. | Serpeck's process |
| C. | Baeyer's process |
| D. | Electrolytic process |
| Answer» D. Electrolytic process | |
| 8808. |
Conjugate base of \[N{{H}_{3}}\] is [RPMT 2002] |
| A. | \[NH_{4}^{\oplus }\] |
| B. | \[NH_{2}^{\oplus }\] |
| C. | \[NH_{2}^{\Theta }\] |
| D. | \[{{N}_{2}}\] |
| Answer» D. \[{{N}_{2}}\] | |
| 8809. |
How much sulphur is present in organic compound if on analysis 0.53 gm of this compound gives 1.158 gm of \[BaS{{O}_{4}}\] [Kerala CET 2005] |
| A. | 0.1 |
| B. | 0.15 |
| C. | 0.2 |
| D. | 0.25 |
| E. | 0.3 |
| Answer» F. | |
| 8810. |
When 32.25gm ethyl chloride dehydro halogenated, if gives 50%. Alkene, what is the mass of product. (atomic mass of chlorine = 35.5) [Kerala CET 2005] |
| A. | 14 gm |
| B. | 28 gm |
| C. | 64.5 gm |
| D. | 56 gm |
| E. | 7 gm |
| Answer» F. | |
| 8811. |
The addition of \[HCl\] will not suppress the ionization of [MP PET 1993] |
| A. | Acetic acid |
| B. | Benzoic acid |
| C. | \[{{H}_{2}}S\] |
| D. | Sulphuric acid |
| Answer» E. | |
| 8812. |
The number of moles of proton which can be easily given by butyne-1(1 mole) is [MP PMT 2000] |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 6 |
| Answer» B. 2 | |
| 8813. |
The shape of methane molecule is [MP PET 1997, 2001] |
| A. | Linear |
| B. | Trigonal planar |
| C. | Square planar |
| D. | Tetrahedral |
| Answer» E. | |
| 8814. |
Which of the following sulphides when heated strongly in air gives the corresponding metal [Kerala PMT 2004] |
| A. | \[C{{u}_{2}}S\] |
| B. | \[CuS\] |
| C. | \[F{{e}_{2}}{{S}_{3}}\] |
| D. | FeS |
| E. | HgS |
| Answer» F. | |
| 8815. |
The cation that does not form an amine complex with excess of ammonia is |
| A. | \[C{{d}^{2+}}\] |
| B. | \[A{{l}^{3+}}\] |
| C. | \[C{{u}^{2+}}\] |
| D. | \[A{{g}^{+}}\] |
| Answer» C. \[C{{u}^{2+}}\] | |
| 8816. |
The ratio between radii of \[H{{e}^{+}}\] ion and H atom is [MP PET 1996] |
| A. | \[\frac{1}{2}\] |
| B. | 1 |
| C. | \[\frac{3}{2}\] |
| D. | 2 |
| Answer» C. \[\frac{3}{2}\] | |
| 8817. |
The smallest among the following ions is [JIPMER 1999] |
| A. | \[N{{a}^{+}}\] |
| B. | \[M{{g}^{+2}}\] |
| C. | \[B{{a}^{2+}}\] |
| D. | \[A{{l}^{3+}}\] |
| Answer» E. | |
| 8818. |
Plumbosolvancy implies dissolution of lead in [DCE 1999] |
| A. | Bases |
| B. | Acids |
| C. | Ordinary water |
| D. | \[CuS{{O}_{4}}\]sol |
| Answer» D. \[CuS{{O}_{4}}\]sol | |
| 8819. |
Which of the following does not have a coordinate bond [MADT Bihar 1984] |
| A. | \[S{{O}_{2}}\] |
| B. | \[HN{{O}_{3}}\] |
| C. | \[{{H}_{2}}S{{O}_{3}}\] |
| D. | \[HN{{O}_{2}}\] |
| Answer» E. | |
| 8820. |
Alumina is [DCE 2002] |
| A. | Acidic |
| B. | Basic |
| C. | Amphoteric |
| D. | None of these |
| Answer» D. None of these | |
| 8821. |
Deuterium resembles hydrogen in chemical properties but reacts [JIPMER 2001] |
| A. | More vigorously than hydrogen |
| B. | Faster than hydrogen |
| C. | Slower than hydrogen |
| D. | Just as hydrogen |
| Answer» D. Just as hydrogen | |
| 8822. |
Purple of cassium is [BHU 2002] |
| A. | Gold solution |
| B. | Silver solution |
| C. | Copper solution |
| D. | Platinum solution |
| Answer» B. Silver solution | |
| 8823. |
Which of the following substances gives a positively charged sol [CPMT 1983, 84; MP PMT 1990; MP PET 1992] |
| A. | Gold |
| B. | A metal sulphite |
| C. | Ferric hydroxide |
| D. | An acidic dye |
| Answer» D. An acidic dye | |
| 8824. |
Ligands, in complex compounds [MP PMT 2003] |
| A. | Accept \[{{e}^{-}}\]-pair |
| B. | Donate \[{{e}^{-}}\]-pair |
| C. | Neither accept \[{{e}^{-}}\]-pair nor donate |
| D. | All of these happen |
| Answer» C. Neither accept \[{{e}^{-}}\]-pair nor donate | |
| 8825. |
If \[{{E}_{f}}\] and \[{{E}_{r}}\] are the activation energies of forward and reverse reactions and the reaction is known to be exothermic, then |
| A. | \[{{E}_{f}}>{{E}_{r}}\] |
| B. | \[{{E}_{f}}<{{E}_{r}}\] |
| C. | \[{{E}_{f}}={{E}_{r}}\] |
| D. | No relation can be given between \[{{E}_{f}}\] and \[{{E}_{r}}\] as data are not sufficient |
| Answer» C. \[{{E}_{f}}={{E}_{r}}\] | |
| 8826. |
The ratio of the value of any colligative property for \[KCl\] solution to that for sugar solution is nearly [MP PMT 1985] |
| A. | 1 |
| B. | 0.5 |
| C. | 2.0 |
| D. | 3 |
| Answer» D. 3 | |
| 8827. |
Whenever the parent nucleus emits a b-particle, the daughter element is shifted in the periodic table [NCERT 1984] |
| A. | One place to the right |
| B. | One place to the left |
| C. | Two places to the right |
| D. | Two places to the left |
| Answer» B. One place to the left | |
| 8828. |
The alum used for purifying water is [KCET (Med.) 2001] |
| A. | Ferric alum |
| B. | Chrome alum |
| C. | Potash alum |
| D. | Ammonium alum |
| Answer» D. Ammonium alum | |
| 8829. |
A mixture of ethyl iodide and n-propyl iodide is subjected to Wurtz reaction. The hydrocarbon that will not be formed is [IIT-JEE (Screening) 1990] |
| A. | n-butane |
| B. | n-propane |
| C. | n-pentane |
| D. | n-hexane |
| Answer» C. n-pentane | |
| 8830. |
Correct formula of potassium ferricyanide is [DPMT 1982, 83; CPMT 1974; AFMC 2005] |
| A. | \[{{K}_{4}}Fe{{(CN)}_{6}}\] |
| B. | \[{{K}_{3}}Fe{{(CN)}_{6}}\] |
| C. | \[{{K}_{3}}[Fe{{(CN)}_{3}}]\] |
| D. | \[{{K}_{3}}[Fe{{(CN)}_{4}}]\] |
| Answer» C. \[{{K}_{3}}[Fe{{(CN)}_{3}}]\] | |
| 8831. |
Glyptals are chiefly employed in |
| A. | Toy making |
| B. | Surface coating |
| C. | Photofilm making |
| D. | Electrical insulators |
| Answer» C. Photofilm making | |
| 8832. |
A sample of petrol is a mixture of 30% n-heptane and 70% iso-octane. The sample has octane number [MP PET 1985] |
| A. | 30 |
| B. | 70 |
| C. | 15 |
| D. | 35 |
| Answer» C. 15 | |
| 8833. |
Benzene can be obtained by heating either benzoic acid with X or phenol with Y. X and Y are respectively [KCET 2004] |
| A. | Zinc dust and soda lime |
| B. | Soda lime and zinc dust |
| C. | Zinc dust and sodium hydroxide |
| D. | Soda lime and copper |
| Answer» C. Zinc dust and sodium hydroxide | |
| 8834. |
Which metal is most difficult to be extracted from its oxide |
| A. | \[Cs\] |
| B. | \[Ag\] |
| C. | \[Zn\] |
| D. | \[Mg\] |
| Answer» D. \[Mg\] | |
| 8835. |
The surface tension of which of the following liquid is maximum ? [CBSE PMT 2005] |
| A. | \[{{H}_{2}}O\] |
| B. | \[{{C}_{6}}{{H}_{6}}\] |
| C. | \[C{{H}_{3}}OH\] |
| D. | \[{{C}_{2}}{{H}_{5}}OH\] |
| Answer» B. \[{{C}_{6}}{{H}_{6}}\] | |
| 8836. |
Which of the following ion is the smallest ion [AIIMS 2001] |
| A. | \[O_{2}^{+}\] |
| B. | \[O_{2}^{-}\] |
| C. | \[{{O}_{2}}\] |
| D. | \[O_{2}^{-2}\] |
| Answer» B. \[O_{2}^{-}\] | |
| 8837. |
A condensation polymer among the following polymers is [KCET 2002] |
| A. | PVC |
| B. | Teflon |
| C. | Decron |
| D. | Polystyrene |
| Answer» D. Polystyrene | |
| 8838. |
A white powder soluble in \[N{{H}_{4}}OH\] but insoluble in water is [AFMC 1987] |
| A. | \[BaS{{O}_{4}}\] |
| B. | \[CuS{{O}_{4}}\] |
| C. | \[PbS{{O}_{4}}\] |
| D. | \[AgCl\] |
| Answer» E. | |
| 8839. |
How much of NaOH is required to neutralise 1500 \[c{{m}^{3}}\]of 0.1 \[N\,HCl\] (Na = 23) [KCET 2001] |
| A. | 40 g |
| B. | 4 g |
| C. | 6 g |
| D. | 60 g |
| Answer» D. 60 g | |
| 8840. |
Which of the following property displays progressive increase down a group in the Bohr's periodic table |
| A. | Electronegativity |
| B. | Electron affinity |
| C. | Ionization potential |
| D. | Size of the atom |
| Answer» E. | |
| 8841. |
The correct order of the increasing ionic character is [MNR 1991; AFMC 1998] |
| A. | \[BeC{{l}_{2}}<MgC{{l}_{2}}<CaC{{l}_{2}}<BaC{{l}_{2}}\] |
| B. | \[BeC{{l}_{2}}<MgC{{l}_{2}}<BaC{{l}_{2}}<CaC{{l}_{2}}\] |
| C. | \[BeC{{l}_{2}}<BaC{{l}_{2}}<MgC{{l}_{2}}<CaC{{l}_{2}}\] |
| D. | \[BaC{{l}_{2}}<CaC{{l}_{2}}<MgC{{l}_{2}}<BeC{{l}_{2}}\] |
| Answer» B. \[BeC{{l}_{2}}<MgC{{l}_{2}}<BaC{{l}_{2}}<CaC{{l}_{2}}\] | |
| 8842. |
One of the constituent of german silver is [IIT 1980; Kurukshetra CEE 1998; DCE 1999] |
| A. | Ag |
| B. | \[Cu\] |
| C. | \[Mg\] |
| D. | \[Al\] |
| Answer» C. \[Mg\] | |
| 8843. |
In which of the following Tyndall effect is not observed [MP PET/PMT 1998] |
| A. | Suspensions |
| B. | Emulsions |
| C. | Sugar solution |
| D. | Gold sol |
| Answer» D. Gold sol | |
| 8844. |
In presence of light & heat toluene chlorinated & react with aqueous \[NaOH\] to give [Kerala CET 2005] |
| A. | o-Cresol |
| B. | p-Cresol |
| C. | Mixture of o- Cresol & p-Cresol |
| D. | Benzoic acid |
| E. | 1, 3, 5 trihydroxy toluene |
| Answer» E. 1, 3, 5 trihydroxy toluene | |
| 8845. |
which is used to reduced the acidity of soil [DPMT 2001] |
| A. | Calcium hydroxide |
| B. | Ammonium sulphate |
| C. | Ammonium nitrate |
| D. | Ammonium chloride |
| Answer» B. Ammonium sulphate | |
| 8846. |
The ionic compound \[BaS{{O}_{4}}\] is insoluble in water due to [CPMT 1999] |
| A. | High lattice energy |
| B. | Low lattice energy |
| C. | Low hydration energy |
| D. | Both a and c |
| Answer» E. | |
| 8847. |
What happens when a mixture of acetylene an hydrogen is passed over heated Lindlar?s catalyst [Kerala PMT 2004; AIIMS 1987] |
| A. | Ethane and water are formed |
| B. | Ethylene is formed |
| C. | Acetylene and ethane are formed |
| D. | None of these |
| Answer» C. Acetylene and ethane are formed | |
| 8848. |
The atomic number of an element is 35. What is the total number of electrons present in all the p-orbitals of the ground state atom of that element [EAMCET (Engg.) 2003] |
| A. | 6 |
| B. | 11 |
| C. | 17 |
| D. | 23 |
| Answer» D. 23 | |
| 8849. |
Which of the following statements is not true for ethane [AIIMS 1996] |
| A. | It can be chlorinated with chlorine |
| B. | It can be catalytically hydrogenated |
| C. | When oxidised produces \[C{{O}_{2}}\] and \[{{H}_{2}}O\] |
| D. | It is a homologue of iso-butane |
| Answer» C. When oxidised produces \[C{{O}_{2}}\] and \[{{H}_{2}}O\] | |
| 8850. |
Bell metal is an alloy of [DPMT 1990, 96; CBSE PMT 1999; Kerala PMT 2002] |
| A. | \[Cu,\,Zn\] and \[Sn\] |
| B. | \[Cu,\,Zn\] and \[Ni\] |
| C. | \[Cu\] and \[Zn\] |
| D. | \[Cu\] and \[Sn\] |
| Answer» E. | |