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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.
| 9701. |
Alkaline earth metals are denser than alkali metals because metallic bonding is [AIIMS 1999] |
| A. | Stronger |
| B. | Weaker |
| C. | Not present |
| D. | Volatile |
| Answer» B. Weaker | |
| 9702. |
Magnesium does not decompose the [AFMC 1999] |
| A. | Steam |
| B. | Hot water |
| C. | Cold Water |
| D. | Semi hot water |
| Answer» D. Semi hot water | |
| 9703. |
The product of acid catalyzed hydration of 2-phenyl propene is [IIT JEE (Screening) 2004] |
| A. | 3-phenyl-2-propanol |
| B. | 1-phenyl-2-propanol |
| C. | 2-phenyl-2-propanol |
| D. | 2-phenyl-1-propanol |
| Answer» D. 2-phenyl-1-propanol | |
| 9704. |
One mole of an ideal gas at \[300K\] is expanded isothermally from an initial volume of 1 litre to 10 litres. The change in energy for this process is \[(R=2\,cal\,mo{{l}^{-1}}{{K}^{-1}})\] [CBSE PMT 1998] |
| A. | 163.7 cal |
| B. | 850.2 cal |
| C. | 1381.1 cal |
| D. | Zero |
| Answer» E. | |
| 9705. |
A coagulating agent frequently added to water to remove the suspended and colloidal impurities is |
| A. | Mohr salt |
| B. | Alum |
| C. | Bleaching powder |
| D. | Copper sulphate |
| Answer» C. Bleaching powder | |
| 9706. |
Benedict solution provides [CPMT 1983] |
| A. | \[A{{g}^{+}}\] |
| B. | \[L{{i}^{+}}\] |
| C. | \[C{{u}^{+2}}\] |
| D. | \[B{{a}^{+2}}\] |
| Answer» D. \[B{{a}^{+2}}\] | |
| 9707. |
Addition of bromine to 1, 3-butadiene gives [AMU 1999] |
| A. | 1, 4-addition product only |
| B. | 1, 2-addition product only |
| C. | Both 1, 2-and 1, 4 addition product |
| D. | None of these |
| Answer» D. None of these | |
| 9708. |
When lead storage battery is charged [MP PET 2003] |
| A. | \[Pb{{O}_{2}}\]is dissolved |
| B. | \[{{H}_{2}}S{{O}_{4}}\]is regenerated |
| C. | \[PbS{{O}_{4}}\]is deposited on lead electrode |
| D. | Lead is deposited on lead electrode |
| Answer» D. Lead is deposited on lead electrode | |
| 9709. |
Which of the following is not o, p?directing group |
| A. | \[-N{{H}_{2}}\] |
| B. | \[-OH\] |
| C. | \[-X\] (halogens) |
| D. | \[-CHO\] |
| Answer» E. | |
| 9710. |
The most probable radius (in pm) for finding the electron in \[H{{e}^{+}}\] is [AIIMS 2005] |
| A. | 0.0 |
| B. | 52.9 |
| C. | 26.5 |
| D. | 105.8 |
| Answer» D. 105.8 | |
| 9711. |
A gas formed by the action of alcoholic KOH on ethyl iodide, decolourises alkaline\[KMn{{O}_{4}}\]. The gas is [KCET 2003] |
| A. | \[{{C}_{2}}{{H}_{6}}\] |
| B. | \[C{{H}_{4}}\] |
| C. | \[{{C}_{2}}{{H}_{2}}\] |
| D. | \[{{C}_{2}}{{H}_{4}}\] |
| Answer» E. | |
| 9712. |
If the solubility product of \[BaS{{O}_{4}}\]is \[1.5\times {{10}^{-9}}\]in water, its solubility in moles per litre, is [BHU 1995; MP PET 1995; UPSEAT 204] |
| A. | \[1.5\times {{10}^{-9}}\] |
| B. | \[3.9\times {{10}^{-5}}\] |
| C. | \[7.5\times {{10}^{-5}}\] |
| D. | \[1.5\times {{10}^{-5}}\] |
| Answer» C. \[7.5\times {{10}^{-5}}\] | |
| 9713. |
When ammonium dichromate is heated, the gas formed is [MP PMT 1993; IIT-JEE 1999] |
| A. | \[{{N}_{2}}\] |
| B. | \[{{O}_{2}}\] |
| C. | \[{{H}_{2}}\] |
| D. | \[N{{H}_{3}}\] |
| Answer» B. \[{{O}_{2}}\] | |
| 9714. |
Maximum carbon-carbon bond distance is found in [MP PMT 1987; IIT-JEE 1981; Bihar MEE 1995] |
| A. | Ethyne |
| B. | Ethene |
| C. | Ethane |
| D. | Benzene |
| Answer» D. Benzene | |
| 9715. |
In the process of forming ?mercerised cellulose? the swelling of cellulose is caused by |
| A. | Water |
| B. | \[N{{a}_{2}}C{{O}_{3}}\] |
| C. | \[Aq.\,\,NaOH\] |
| D. | \[Aq.\,\,HCl\] |
| Answer» D. \[Aq.\,\,HCl\] | |
| 9716. |
Which of the following species is an acid and also a conjugate base of another acid [NCERT 1981] |
| A. | \[HSO_{4}^{-}\] |
| B. | \[{{H}_{2}}S{{O}_{4}}\] |
| C. | \[O{{H}^{-}}\] |
| D. | \[{{H}_{3}}{{O}^{+}}\] |
| Answer» B. \[{{H}_{2}}S{{O}_{4}}\] | |
| 9717. |
Excess of KI reacts with \[CuS{{O}_{4}}\] solution and then \[N{{a}_{2}}{{S}_{2}}{{O}_{3}}\] solution is added to it. Which of the statements is incorrect for this reaction [AIEEE 2004] |
| A. | \[N{{a}_{2}}{{S}_{2}}{{O}_{3}}\] is oxidised |
| B. | \[Cu{{I}_{2}}\] is formed |
| C. | \[C{{u}_{2}}{{I}_{2}}\]is formed |
| D. | Evolved \[{{I}_{2}}\] is reduced |
| Answer» C. \[C{{u}_{2}}{{I}_{2}}\]is formed | |
| 9718. |
Colemnite is [AFMC 2004] |
| A. | \[Ca[{{B}_{3}}{{O}_{4}}{{(OH)}_{2}}].2{{H}_{2}}O\] |
| B. | \[C{{a}_{2}}{{B}_{6}}{{O}_{11}}.5{{H}_{2}}O\] |
| C. | \[Ca{{(OH)}_{2}}\] |
| D. | \[N{{a}_{2}}{{B}_{4}}{{O}_{7}}.2{{H}_{2}}O\] |
| Answer» C. \[Ca{{(OH)}_{2}}\] | |
| 9719. |
Sorel's cement is [Pb.CET 2003] |
| A. | Portland cement \[+MgO\] |
| B. | \[MgC{{l}_{2}}.CaSi{{O}_{3}}.2{{H}_{2}}O\] |
| C. | \[CaSi{{O}_{3}}.MgC{{O}_{3}}\] |
| D. | \[MgC{{l}_{2}}.5MgO.x{{H}_{2}}O\] |
| Answer» E. | |
| 9720. |
A coordinate bond is formed when an atom in a molecule has [CBSE PMT 1992] |
| A. | Electric charge on it |
| B. | All its valency electrons shared |
| C. | A single unshared electron |
| D. | One or more unshared electron pair |
| Answer» E. | |
| 9721. |
EDTA has coordination number [AFMC 2004] |
| A. | 3 |
| B. | 4 |
| C. | 5 |
| D. | 6 |
| Answer» E. | |
| 9722. |
Which is helpful in the formation of ionic bond |
| A. | Only small cation |
| B. | Only small anion |
| C. | Small cation and small anion both |
| D. | Low positive charge, large cation and small anion |
| Answer» E. | |
| 9723. |
Which of the following ionic radius would be maximum [MP PET 1997] |
| A. | \[{{C}^{4-}}\] |
| B. | \[{{N}^{3-}}\] |
| C. | \[{{O}^{2-}}\] |
| D. | \[M{{g}^{2+}}\] |
| Answer» B. \[{{N}^{3-}}\] | |
| 9724. |
Which one of the following reactions would be the best for the formation of 2-bromobutane [MP PET 1994] (1) \[C{{H}_{3}}CH=CHC{{H}_{2}}C{{H}_{3}}\xrightarrow{HBr}\] (2) \[C{{H}_{3}}C{{H}_{2}}CH=C{{H}_{2}}\xrightarrow{HBr}\] (3) \[C{{H}_{3}}CH=CHC{{H}_{3}}\xrightarrow{B{{r}_{2}}}\] (4) \[C{{H}_{3}}C{{H}_{2}}CH=C{{H}_{2}}\underset{\text{Peroxide}}{\mathop{\xrightarrow{HBr}}}\,\] |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 9725. |
According to the collision theory of chemical reactions |
| A. | A chemical reaction occurs with every molecular collision |
| B. | Rate is directly proportional to the number of collisions per second |
| C. | Reactions in the gas phase are always of zero order |
| D. | Reaction rates are of the order of molecular speeds |
| Answer» C. Reactions in the gas phase are always of zero order | |
| 9726. |
The conjugate acid of \[HPO_{3}^{2-}\]is [EAMCET 1989] |
| A. | \[{{H}_{3}}P{{O}_{4}}\] |
| B. | \[{{H}_{3}}P{{O}_{3}}\] |
| C. | \[{{H}_{2}}PO_{3}^{-}\] |
| D. | \[PO_{4}^{3-}\] |
| Answer» D. \[PO_{4}^{3-}\] | |
| 9727. |
Which one of the following dissolve in hot concentrated \[NaOH\] solution [IIT 1980] |
| A. | \[Fe\] |
| B. | \[Zn\] |
| C. | \[Cu\] |
| D. | \[Ag\] |
| Answer» C. \[Cu\] | |
| 9728. |
Which one is not called a anode reaction from the following |
| A. | \[C{{l}^{-}}\,\to \,\frac{1}{2}C{{l}_{2}}+{{e}^{-}}\] |
| B. | \[Cu\,\to \,C{{u}^{++}}+2{{e}^{-}}\] |
| C. | \[H{{g}^{+}}\,\to \,H{{g}^{++}}+{{e}^{-}}\] |
| D. | \[Z{{n}^{2+}}+2{{e}^{-}}\,\to \,Zn\] |
| Answer» E. | |
| 9729. |
Energy required to separate neutron and proton from the nucleus is called [RPMT 1999] |
| A. | Bond energy |
| B. | Nuclear energy |
| C. | Chemical energy |
| D. | Radiation energy |
| Answer» C. Chemical energy | |
| 9730. |
\[Be{{(OH)}_{2}}\] is insoluble in water while \[Ba{{(OH)}_{2}}\] is highly soluble due to [AMU 2002] |
| A. | Bond order |
| B. | Lattice energy difference |
| C. | Common ion effect |
| D. | Hard acid |
| Answer» C. Common ion effect | |
| 9731. |
What quantity of ammonium sulphate is necessary for the production of \[N{{H}_{3}}\]gas sufficient to neutralize a solution containing 292 g of \[HCl\]? [HCl=36.5; \[{{(N{{H}_{4}})}_{2}}S{{O}_{4}}\]=132; \[N{{H}_{3}}\]=17] [CPMT 1992] |
| A. | 272 g |
| B. | 403 g |
| C. | 528 g |
| D. | 1056 g |
| Answer» D. 1056 g | |
| 9732. |
PVC is polymer of [CPMT 2003] |
| A. | \[C{{H}_{2}}=C{{H}_{2}}\] |
| B. | \[C{{H}_{2}}=CH-Cl\] |
| C. | \[C{{H}_{2}}=CH-C{{H}_{2}}Cl\] |
| D. | \[C{{H}_{3}}-CH=CH-Cl\] |
| Answer» C. \[C{{H}_{2}}=CH-C{{H}_{2}}Cl\] | |
| 9733. |
\[_{92}^{238}U\] emits 8 a-particles and 6 b-particles. The neutron/proton ratio in the product nucleus is [AIIMS 2005] |
| A. | 60/41 |
| B. | 61/40 |
| C. | 62/41 |
| D. | 61/42 |
| Answer» D. 61/42 | |
| 9734. |
The number of neutral molecules or negative groups attached to the central metal atom in a complex ion is called |
| A. | Atomic number |
| B. | Effective atomic number |
| C. | Coordination number |
| D. | Primary valency |
| Answer» D. Primary valency | |
| 9735. |
2gm of \[{{O}_{2}}\] at \[{{27}^{o}}C\] and 760mm of Hg pressure has volume [BCECE 2005] |
| A. | 1.5 lit. |
| B. | 2.8 lit. |
| C. | 11.2 lit. |
| D. | 22.4 lit. |
| Answer» B. 2.8 lit. | |
| 9736. |
Which of the following statements is not true for a lyophobic sol |
| A. | It can be easily solvated |
| B. | It carries charge |
| C. | The coagulation of this sol is irreversible in nature |
| D. | It is less stable in a solvent |
| Answer» B. It carries charge | |
| 9737. |
Plaster of Paris is [CPMT 1972, 76, 78, 83, 87, 88, 90, 91, 93, 94; JIPMER 2002; MP PET 1986, 2001; BHU 1992, 95, 2000; MNR 1982; DCE 2000; Manipal MEE 1995; NCERT 1976; Bihar MEE 1997; EAMCET 1978; AMU 1982, 84; DPMT 1982, 83] |
| A. | \[CaS{{O}_{4}}.2{{H}_{2}}O\] |
| B. | \[CaS{{O}_{4}}.3{{H}_{2}}O\] |
| C. | \[CaS{{O}_{4}}.{{H}_{2}}O\] |
| D. | \[CaS{{O}_{4}}.\frac{1}{2}{{H}_{2}}O\] |
| Answer» E. | |
| 9738. |
To remove last traces of water from alcohol, the metal used is |
| A. | Sodium |
| B. | Potassium |
| C. | Calcium |
| D. | Aluminium |
| Answer» D. Aluminium | |
| 9739. |
If O.P. of 1 M of the following in water can be measured, which one will show the maximum O.P. [NCERT 1975; CPMT 1977; JIPMER 2001] |
| A. | \[AgN{{O}_{3}}\] |
| B. | \[MgC{{l}_{2}}\] |
| C. | \[{{(N{{H}_{4}})}_{3}}P{{O}_{4}}\] |
| D. | \[N{{a}_{2}}S{{O}_{4}}\] |
| Answer» D. \[N{{a}_{2}}S{{O}_{4}}\] | |
| 9740. |
When propyne is treated with dilute \[{{H}_{2}}S{{O}_{4}}\] and \[HgS{{O}_{4}}\], the major product is [Kurukshetra CEE 2002] |
| A. | Propanal |
| B. | Propanol |
| C. | Propyl hydrogen sulphate |
| D. | Propanone |
| Answer» E. | |
| 9741. |
In Kjeldahl?s method of estimation of N,\[CuS{{O}_{4}}\]acts as [DCE 2002] |
| A. | Oxidising agent |
| B. | Reducing agent |
| C. | Catalytic agent |
| D. | Hydrolysis agent |
| Answer» D. Hydrolysis agent | |
| 9742. |
An organic compound having molecular mass 60 is found to contain C = 20%, H= 6.67% and N=46.67% while rest is oxygen. On heating it gives \[N{{H}_{3}}\] alongwith a solid residue. The solid residue give violet colour with alkaline copper sulphate solution. the compound is [AIEEE 2005] |
| A. | \[C{{H}_{3}}NCO\] |
| B. | \[C{{H}_{3}}CON{{H}_{2}}\] |
| C. | \[{{(N{{H}_{2}})}_{2}}CO\] |
| D. | \[C{{H}_{3}}C{{H}_{2}}CON{{H}_{2}}\] |
| Answer» D. \[C{{H}_{3}}C{{H}_{2}}CON{{H}_{2}}\] | |
| 9743. |
For the isothermal expansion of an ideal gas |
| A. | E and H increases |
| B. | E increases but H decreases |
| C. | H increases but E decreases |
| D. | E and H are unaltered |
| Answer» E. | |
| 9744. |
In \[{{K}^{+}}{{F}^{-}}\] ionic radius of \[{{F}^{-}}\] is more while atomic radius of \[{{K}^{+}}\] is [CPMT 1997] |
| A. | Less than \[{{F}^{-}}\] |
| B. | More than \[{{F}^{-}}\] |
| C. | Equal of \[{{F}^{-}}\] |
| D. | None of these |
| Answer» C. Equal of \[{{F}^{-}}\] | |
| 9745. |
Which one of the following species possesses maximum size [EAMCET 1993; MP PET 2001] |
| A. | \[N{{a}^{+}}\] |
| B. | \[{{F}^{-}}\] |
| C. | \[Ne\] |
| D. | \[{{O}^{2-}}\] |
| Answer» E. | |
| 9746. |
Knocking sound occurs in engine when fuel [CPMT 1981] |
| A. | Ignites slowly |
| B. | Ignites rapidly |
| C. | Contains water |
| D. | Is mixed with machine oil |
| Answer» C. Contains water | |
| 9747. |
\[CO\] has same electrons as or the ion that is isoelectronic with \[CO\] is [CPMT 1984; IIT 1982; EAMCET 1990; CBSE PMT 1997] |
| A. | \[N_{2}^{+}\] |
| B. | \[C{{N}^{-}}\] |
| C. | \[O_{2}^{+}\] |
| D. | \[O_{2}^{-}\] |
| Answer» C. \[O_{2}^{+}\] | |
| 9748. |
\[N{{a}_{2}}C{{O}_{3}}\] can be manufactured by Solvey's process but \[{{K}_{2}}C{{O}_{3}}\] cannot be prepared because [MP PMT 1993] |
| A. | \[{{K}_{2}}C{{O}_{3}}\] is more soluble |
| B. | \[{{K}_{2}}C{{O}_{3}}\] is less soluble |
| C. | \[KHC{{O}_{3}}\] is more soluble than \[NaHC{{O}_{3}}\] |
| D. | \[KHC{{O}_{3}}\] is less soluble than \[NaHC{{O}_{3}}\] |
| Answer» D. \[KHC{{O}_{3}}\] is less soluble than \[NaHC{{O}_{3}}\] | |
| 9749. |
A well known reagent which contains copper sulphate, sodium potassium tarterate and sodium hydroxide is |
| A. | Fenton's reagent |
| B. | Schiff's reagent |
| C. | Fehling's solution |
| D. | Nessler's reagent |
| Answer» D. Nessler's reagent | |
| 9750. |
Which of the following has highest percentage of hydrogen [CPMT 1975; 79] |
| A. | \[C{{H}_{4}}\] |
| B. | \[{{C}_{2}}{{H}_{4}}\] |
| C. | \[{{C}_{6}}{{H}_{6}}\] |
| D. | \[{{C}_{2}}{{H}_{2}}\] |
| Answer» B. \[{{C}_{2}}{{H}_{4}}\] | |