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.
| 7501. |
Which of the following fractions of petroleum refining contains kerosene ? (Boiling ranges in \[^{o}C\] are given below) |
| A. | 40 - 80 |
| B. | 80 - 200 |
| C. | 200 - 300 |
| D. | Above 300 |
| Answer» D. Above 300 | |
| 7502. |
Gun-cotton is obtained when conc. nitric acid reacts with |
| A. | Glycerine |
| B. | Glycol |
| C. | Cellulose |
| D. | Starch |
| Answer» D. Starch | |
| 7503. |
Dry distillation of sodium propanoate with sodalime gives [CPMT 1996] |
| A. | Propane |
| B. | Propene |
| C. | Ethane |
| D. | Ethene |
| Answer» D. Ethene | |
| 7504. |
16.8 litre gas containing \[{{H}_{2}}\] and \[{{O}_{2}}\]is formed at NTP on electrolysis of water. What should be the weight of electrolysed water |
| A. | 5 g |
| B. | 9 g |
| C. | 10 g |
| D. | 12 g |
| Answer» C. 10 g | |
| 7505. |
When propyne reacts with aqueous \[{{H}_{2}}S{{O}_{4}}\] in the presence of \[{{C}_{2}}{{H}_{4}}\], the major product is [IIT-JEE 1983; AFMC 1991; KCET 1993] |
| A. | Propanal |
| B. | Propyl hydrogen sulphate |
| C. | Acetone |
| D. | Propanol |
| Answer» D. Propanol | |
| 7506. |
Experimental evidence for the existence of the atomic nucleus comes from [CBSE PMT 1989] |
| A. | Millikan's oil drop experiment |
| B. | Atomic emission spectroscopy |
| C. | The magnetic bending of cathode rays |
| D. | Alpha scattering by a thin metal foil |
| Answer» E. | |
| 7507. |
Which of the following is not isoelectronic [MP PET 2002] |
| A. | \[N{{a}^{+}}\] |
| B. | \[M{{g}^{2+}}\] |
| C. | \[{{O}^{2-}}\] |
| D. | \[C{{l}^{-}}\] |
| Answer» E. | |
| 7508. |
Which of the following used for the conversion of 2-hexyne into trans-2-hexane [IIT JEE (Screening) 2004] |
| A. | \[{{H}_{2}}/Pd/BaS{{O}_{4}}\] |
| B. | \[{{H}_{2}},Pt{{O}_{2}}\] |
| C. | \[NaB{{H}_{4}}\] |
| D. | \[Li-N{{H}_{3}}/{{C}_{2}}{{H}_{5}}OH\] |
| Answer» E. | |
| 7509. |
In equimolar solution of glucose, \[NaCl\] and \[BaC{{l}_{2}}\], the order of osmotic pressure is as follow [CPMT 1988, 93; MP PMT/PET 1988; MP PET 1997, 2003] |
| A. | Glucose \[>\,NaCl\,\,>\,\,BaC{{l}_{2}}\] |
| B. | \[NaCl\,\,>\,\,BaC{{l}_{2}}\,\,>\] Glucose |
| C. | \[BaC{{l}_{2}}\,\,>\,\,NaCl\,\,>\] Glucose |
| D. | Glucose \[>\,\,BaC{{l}_{2}}\,\,>\,\,NaCl\] |
| Answer» D. Glucose \[>\,\,BaC{{l}_{2}}\,\,>\,\,NaCl\] | |
| 7510. |
One calorie is equal to [CPMT 1988] |
| A. | 0.4184 Joule |
| B. | 4.184 Joule |
| C. | 41.84 Joule |
| D. | 418.4 Joule |
| Answer» C. 41.84 Joule | |
| 7511. |
Name of the structure of silicates in which three oxygen atoms of [SiO4]4- are shared is [IIT 2005] |
| A. | Pyrosilicate |
| B. | Sheet silicate |
| C. | Linear chain silicate |
| D. | Three dimensional silicate |
| Answer» E. | |
| 7512. |
The number of \[\alpha \] and \[\beta -\]particles emitted in the nuclear reaction \[_{92}{{U}^{238}}{{\to }_{90}}T{{h}^{234}}{{\to }_{91}}P{{a}^{234}}\]are respectively [Pb.CET 2001] |
| A. | 1 and 1 |
| B. | 1 and 2 |
| C. | 2 and 1 |
| D. | 2 and 2 |
| Answer» B. 1 and 2 | |
| 7513. |
The anode half-reaction occurring during the discharge of a lead storage battery is |
| A. | \[Pb(s)+S{{O}_{2}}+{{O}_{2}}\to PbS{{O}_{4}}(s)\] |
| B. | \[Pb(s)+SO_{4}^{2-}(aq)\]⇌\[PbS{{O}_{4}}(s)+2{{e}^{-}}\] |
| C. | \[Pb{{O}_{2}}(s)+4{{H}^{+}}(aq)+2{{e}^{-}}+SO_{4}^{2-}(aq)\]⇌ \[PbS{{O}_{4}}(s)+2{{H}_{2}}O\] |
| D. | \[P{{b}^{2+}}(aq)+SO_{4}^{2-}(aq)\to PbS{{O}_{4}}(s)\] |
| Answer» C. \[Pb{{O}_{2}}(s)+4{{H}^{+}}(aq)+2{{e}^{-}}+SO_{4}^{2-}(aq)\]⇌ \[PbS{{O}_{4}}(s)+2{{H}_{2}}O\] | |
| 7514. |
The value of the energy for the first excited state of hydrogen atom will be [MP PET 2002] |
| A. | \[-\,13.6\,eV\] |
| B. | \[-\,3.40\,eV\] |
| C. | \[-\,1.51\,eV\] |
| D. | \[-\,0.85\,eV\] |
| Answer» C. \[-\,1.51\,eV\] | |
| 7515. |
Bakelites are |
| A. | Rubber |
| B. | Rayon |
| C. | Resins |
| D. | Plasticisers |
| Answer» D. Plasticisers | |
| 7516. |
When toluene is treated with \[KMn{{O}_{4}}\], what is produced [AFMC 2005] |
| A. | Benzene |
| B. | Chlorobenzene |
| C. | Benzaldehyde |
| D. | Benzoic acid |
| Answer» E. | |
| 7517. |
s The compound of copper which turns green on keeping in air is [CPMT 1984] |
| A. | Copper sulphate |
| B. | Copper nitrate |
| C. | Cupric chloride |
| D. | Cuprous chloride |
| Answer» E. | |
| 7518. |
An irreversible process occuring isothermally in an isolated system leads to |
| A. | Zero entropy |
| B. | An increase in the total entropy of the system |
| C. | A decrease in the total entropy of the system |
| D. | None of these |
| Answer» C. A decrease in the total entropy of the system | |
| 7519. |
On reduction with hydrogen, 3.6 g of an oxide of metal left 3.2 g of metal. If the vapour density of metal is 32, the simplest formula of the oxide would be [DPMT 2004] |
| A. | \[MO\] |
| B. | \[{{M}_{2}}{{O}_{3}}\] |
| C. | \[{{M}_{2}}O\] |
| D. | \[{{M}_{2}}{{O}_{5}}\] |
| Answer» D. \[{{M}_{2}}{{O}_{5}}\] | |
| 7520. |
How many ml of 1 (M) \[{{H}_{2}}S{{O}_{4}}\] is required to neutralise 10 ml of 1 (M) NaOH solution [MP PET 1998; MNR 1982; MP PMT 1987] |
| A. | 2.5 |
| B. | 5.0 |
| C. | 10.0 |
| D. | 20.0 |
| Answer» C. 10.0 | |
| 7521. |
Sticking of one substance at the surface of another is called |
| A. | Absorption |
| B. | Chemisorption |
| C. | Adsorption |
| D. | Desorption |
| Answer» D. Desorption | |
| 7522. |
Conjugate double bond is present in [MP PMT 1987] |
| A. | Propylene |
| B. | Butadiene |
| C. | Isobutylene |
| D. | Butylene |
| Answer» C. Isobutylene | |
| 7523. |
The ?epimerisation? involves |
| A. | Change of configuration |
| B. | Addition of one more 'C' |
| C. | Substration of a 'C' |
| D. | Conversion of \[-CHO\] to \[-C=O\] |
| Answer» B. Addition of one more 'C' | |
| 7524. |
The activation energy of a reaction is zero. The rate constant of this reaction |
| A. | Increases with increase of temperature |
| B. | Decreases with an increase of temperature |
| C. | Decreases with decrease of temperature |
| D. | Is independent of temperature |
| Answer» E. | |
| 7525. |
How many alpha particles are emitted in the nuclear transformation \[_{84}P{{o}^{215}}{{\xrightarrow{{}}}_{82}}P{{b}^{211}}\] [CPMT 1993] |
| A. | 0 |
| B. | 1 |
| C. | 2 |
| D. | 3 |
| Answer» C. 2 | |
| 7526. |
The relationship between standard reduction potential of cell and equilibrium constant is shown by [MP PET 2002] |
| A. | \[E_{cell}^{0}=\frac{n}{0.059}\log {{K}_{c}}\] |
| B. | \[E_{cell}^{0}=\frac{0.059}{n}\log {{K}_{c}}\] |
| C. | \[E_{cell}^{0}=0.059\,n\,\log {{K}_{c}}\] |
| D. | \[E_{cell}^{0}=\frac{\log {{K}_{c}}}{n}\] |
| Answer» C. \[E_{cell}^{0}=0.059\,n\,\log {{K}_{c}}\] | |
| 7527. |
Which of the following processes does not involve a catalyst [KCET 1991; AIIMS 1996] |
| A. | Haber's process |
| B. | Thermite process |
| C. | Ostwald process |
| D. | Contact process |
| Answer» C. Ostwald process | |
| 7528. |
Most of the hydrocarbons from petroleum are obtained by [CPMT 1974, 80] |
| A. | Fractional distillation |
| B. | Fractional crystallization |
| C. | Vaporization |
| D. | Polymerization |
| Answer» B. Fractional crystallization | |
| 7529. |
The conjugate base in the following reaction \[{{H}_{2}}S{{O}_{4}}+{{H}_{2}}O\] ⇄ \[{{H}_{3}}{{O}^{+}}+HSO_{4}^{-}\] [DCE 1999] |
| A. | \[{{H}_{2}}O\] |
| B. | \[HSO_{4}^{-}\] |
| C. | \[{{H}_{3}}{{O}^{+}}\] |
| D. | \[S{{O}_{2}}\] |
| Answer» C. \[{{H}_{3}}{{O}^{+}}\] | |
| 7530. |
Which of the following does not exist in free form [Kerala PMT 2004] |
| A. | \[B{{F}_{3}}\] |
| B. | \[BC{{l}_{3}}\] |
| C. | \[BB{{r}_{3}}\] |
| D. | \[B{{H}_{3}}\] |
| E. | None of these |
| Answer» E. None of these | |
| 7531. |
Gun metal is an alloy of [MP PMT 1990; CPMT 1997] |
| A. | \[Cu\] and \[Al\] |
| B. | \[Cu,\,Sn\] and \[Zn\] |
| C. | \[Cu,\,Zn\] and \[Ni\] |
| D. | \[Cu\] and \[Sn\] |
| Answer» C. \[Cu,\,Zn\] and \[Ni\] | |
| 7532. |
Following data is known about melting of a compound AB. \[\Delta H=9.2\,kJ\,mo{{l}^{-1}}\], \[\Delta S=0.008\,kJ\,{{K}^{-1}}mo{{l}^{-1}}\]. Its melting point is [Pb. PMT 2000; AIIMS 2000] |
| A. | 736 K |
| B. | 1050 K |
| C. | \[1150\,K\] |
| D. | \[{{1150}^{o}}C\] |
| Answer» D. \[{{1150}^{o}}C\] | |
| 7533. |
Which of the following is a Lewis base [BHU 1995] |
| A. | \[C{{H}_{4}}\] |
| B. | \[{{C}_{2}}{{H}_{5}}OH\] |
| C. | Acetone |
| D. | Secondary amine |
| Answer» C. Acetone | |
| 7534. |
Which has yellow colour |
| A. | Potassium cobaltinitrite |
| B. | Potassium hexanitro cobaltate (III) |
| C. | Fischer's salt |
| D. | All the above |
| Answer» E. | |
| 7535. |
Iso-octane is mixed to the petrol [NCERT 1972] |
| A. | To precipitate inorganic substances |
| B. | To prevent freezing of petrol |
| C. | To increase boiling point of petrol |
| D. | As an antiknock |
| Answer» E. | |
| 7536. |
Modern method for the manufacture of steel is |
| A. | Bessemer process |
| B. | Seimen-Martin's open hearth process |
| C. | Duplex method |
| D. | L.D. process |
| Answer» E. | |
| 7537. |
Silver chloride dissolves in excess of \[N{{H}_{4}}OH\]. The cation present in this solution is [EAMCET 1998] |
| A. | \[A{{g}^{+}}\] |
| B. | \[{{\left[ Ag{{\left( N{{H}_{3}} \right)}_{2}} \right]}^{+}}\] |
| C. | \[{{\left[ Ag{{\left( N{{H}_{3}} \right)}_{4}} \right]}^{+}}\] |
| D. | \[{{\left[ Ag{{\left( N{{H}_{3}} \right)}_{6}} \right]}^{+}}\] |
| Answer» C. \[{{\left[ Ag{{\left( N{{H}_{3}} \right)}_{4}} \right]}^{+}}\] | |
| 7538. |
Which of the following has lowest percentage of carbon [DPMT 1984; CPMT 1989, 91, 94; KCET 2000] |
| A. | Cast iron |
| B. | Wrought iron |
| C. | Steel |
| D. | All have same percentage |
| Answer» C. Steel | |
| 7539. |
At equilibrium, if to a saturated solution of \[NaCl,\,HCl\] is passed, \[NaCl\] gets precipitated because [RPMT 1999] |
| A. | \[HCl\] is a strong acid |
| B. | Solubility of \[NaCl\] decreases |
| C. | Ionic product of \[NaCl\] becomes greater than its \[{{K}_{sp}}\] |
| D. | \[HCl\] is a weak acid |
| Answer» D. \[HCl\] is a weak acid | |
| 7540. |
Among the following, which is not the p-bonded organometallic compound [CBSE PMT 2003] |
| A. | \[{{(C{{H}_{3}})}_{4}}Sn\] |
| B. | \[K[PtC{{l}_{3}}({{\eta }^{2}}-{{C}_{2}}{{H}_{4}})]\] |
| C. | \[Fe{{({{\eta }^{5}}-{{C}_{5}}{{H}_{5}})}_{2}}\] |
| D. | \[Cr{{({{\eta }^{6}}-{{C}_{6}}{{H}_{6}})}_{2}}\] |
| Answer» B. \[K[PtC{{l}_{3}}({{\eta }^{2}}-{{C}_{2}}{{H}_{4}})]\] | |
| 7541. |
In the redox reaction \[2MnO_{4}^{-}+5{{C}_{2}}O_{4}^{2-}+16{{H}^{+}}\]⇌\[2M{{n}^{2+}}+10C{{O}_{2}}+8{{H}_{2}}O\] The ion acting as autocatalyst is [MP PMT 1986,94] |
| A. | \[MnO_{4}^{-}\] |
| B. | \[{{C}_{2}}O_{4}^{2-}\] |
| C. | \[{{H}^{+}}\] |
| D. | \[M{{n}^{2+}}\] |
| Answer» E. | |
| 7542. |
Solubility of a salt \[{{M}_{2}}{{X}_{3}}\] is \[y\,\,mol\,d{{m}^{-3}}.\] The solubility product of the salt will be [IIT 1990, 97; AFMC 1991; RPMT 1999; MP PET 2001; MP PMT 2003; Orissa JEE 2005] |
| A. | \[6{{y}^{4}}\] |
| B. | \[64{{y}^{4}}\] |
| C. | \[36{{y}^{5}}\] |
| D. | \[108{{y}^{5}}\] |
| Answer» E. | |
| 7543. |
The conjugate base of \[HCO_{3}^{-}\] is |
| A. | \[{{H}_{2}}C{{O}_{3}}\] |
| B. | \[CO_{3}^{2-}\] |
| C. | \[C{{O}_{2}}\] |
| D. | \[{{H}_{2}}O\] |
| Answer» C. \[C{{O}_{2}}\] | |
| 7544. |
Which of the following occurs easily in ethylene [MNR 1987; NCERT 1979] |
| A. | Addition |
| B. | Substitution |
| C. | Elimination |
| D. | Rearrangement |
| Answer» B. Substitution | |
| 7545. |
74.5 g of a metallic chloride contain 35.5 g of chlorine. The equivalent weight of the metal is [CPMT 1986] |
| A. | 19.5 |
| B. | 35.5 |
| C. | 39.0 |
| D. | 78.0 |
| Answer» D. 78.0 | |
| 7546. |
Which of the following contains a coordinate covalent bond [MNR 1990; IIT 1986] |
| A. | \[{{N}_{2}}{{O}_{5}}\] |
| B. | \[BaC{{l}_{2}}\] |
| C. | \[HCl\] |
| D. | \[{{H}_{2}}O\] |
| Answer» B. \[BaC{{l}_{2}}\] | |
| 7547. |
In Lewis acid-base theory, neutralization reaction may be considered as [NCERT 1977] |
| A. | Formation of salt and water |
| B. | Competition for protons by acid and base |
| C. | Oxidation reduction |
| D. | Coordinate covalent bond formation |
| Answer» E. | |
| 7548. |
The formula of corrosive sublimate is [CPMT 1997] |
| A. | \[HgC{{l}_{2}}\] |
| B. | \[H{{g}_{2}}C{{l}_{2}}\] |
| C. | \[H{{g}_{2}}O\] |
| D. | \[Hg\] |
| Answer» B. \[H{{g}_{2}}C{{l}_{2}}\] | |
| 7549. |
For cell reaction, \[Zn+C{{u}^{2+}}\to Z{{n}^{2+}}+Cu,\] cell representation is cell cell [BCECE 2005] |
| A. | Zn | Zn2+||Cu2+|Cu |
| B. | Cu | Cu2+ ||Zn2+| Zn |
| C. | Cu | Zn2+ || Zn | Cu2+ |
| D. | Cu2+ | Zn || Zn2+ | Cu |
| Answer» B. Cu | Cu2+ ||Zn2+| Zn | |
| 7550. |
India conducted an underground nuclear test at [KCET 1998] |
| A. | Tarapur |
| B. | Narora |
| C. | Pokhran |
| D. | Pushkar |
| Answer» D. Pushkar | |