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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.
| 4601. |
Which of the following is not a nitro-derivative [DCE 2004] |
| A. | \[{{C}_{6}}{{H}_{5}}N{{O}_{2}}\] |
| B. | \[C{{H}_{3}}C{{H}_{2}}ONO\] |
| C. | |
| D. | \[{{C}_{6}}{{H}_{4}}(OH)N{{O}_{2}}\] |
| Answer» C. | |
| 4602. |
Leakage of which gas was responsible for the Bhopal tragedy in 1984 [MP PET 2001] |
| A. | \[C{{H}_{3}}-N=C=O\] |
| B. | \[C{{H}_{3}}-C-N=S\] |
| C. | \[CHC{{l}_{3}}\] |
| D. | \[{{C}_{6}}{{H}_{5}}COCl\] |
| Answer» B. \[C{{H}_{3}}-C-N=S\] | |
| 4603. |
\[C{{H}_{2}}=CH-C{{H}_{2}}-NH-C{{H}_{3}}\] is a [RPET 2000] |
| A. | Secondary amine |
| B. | Primary amine |
| C. | Tertiary amine |
| D. | None of these |
| Answer» B. Primary amine | |
| 4604. |
Cyanide ion is |
| A. | Nucleophilic |
| B. | Electrophilic |
| C. | Strongly acidic |
| D. | Non-reactive and neutral |
| Answer» B. Electrophilic | |
| 4605. |
Benzene hexachloride is |
| A. | 1, 2, 3, 4, 5, 6-hexachlorocyclohexane |
| B. | 1, 1, 1, 6, 6, 6-hexachlorocyclohexane |
| C. | 1, 6-phenyl-1, 6-chlorohexane |
| D. | 1, 1-phenyl-6, 6-chlorohexane |
| Answer» B. 1, 1, 1, 6, 6, 6-hexachlorocyclohexane | |
| 4606. |
Haloforms are trihalogen derivatives of [CPMT 1985] |
| A. | Ethane |
| B. | Methane |
| C. | Propane |
| D. | Benzene |
| Answer» C. Propane | |
| 4607. |
Which of the following halide is \[{{2}^{o}}\] |
| A. | Isopropyl chloride |
| B. | Isobutyl chloride |
| C. | n-propyl chloride |
| D. | n-butyl chloride |
| Answer» B. Isobutyl chloride | |
| 4608. |
Benzylidene chloride is |
| A. | \[{{C}_{6}}{{H}_{5}}C{{H}_{2}}Cl\] |
| B. | \[{{C}_{6}}{{H}_{5}}CHC{{l}_{2}}\] |
| C. | \[{{C}_{6}}{{H}_{4}}ClC{{H}_{2}}Cl\] |
| D. | \[{{C}_{6}}{{H}_{5}}CC{{l}_{3}}\] |
| Answer» C. \[{{C}_{6}}{{H}_{4}}ClC{{H}_{2}}Cl\] | |
| 4609. |
Ethylidene dibromide is |
| A. | \[C{{H}_{3}}-C{{H}_{2}}-Br\] |
| B. | \[Br-C{{H}_{2}}-C{{H}_{2}}-Br\] |
| C. | \[C{{H}_{3}}-CHB{{r}_{2}}\] |
| D. | \[C{{H}_{2}}=CB{{r}_{2}}\] |
| Answer» D. \[C{{H}_{2}}=CB{{r}_{2}}\] | |
| 4610. |
Gem- dibromide is [RPMT 2000] |
| A. | \[C{{H}_{3}}CH(Br)OH(Br)C{{H}_{3}}\] |
| B. | \[C{{H}_{3}}CB{{r}_{2}}C{{H}_{3}}\] |
| C. | \[C{{H}_{2}}(Br)C{{H}_{2}}C{{H}_{2}}\] |
| D. | \[C{{H}_{2}}BrC{{H}_{2}}Br\] |
| Answer» C. \[C{{H}_{2}}(Br)C{{H}_{2}}C{{H}_{2}}\] | |
| 4611. |
In \[C{{H}_{3}}C{{H}_{2}}Br,\,\,%\] of Br is [DPMT 1996] |
| A. | 80 |
| B. | 75 |
| C. | 70 |
| D. | 7 |
| Answer» C. 70 | |
| 4612. |
The compound which contains all the four \[{{1}^{o}},{{2}^{o}},{{3}^{o}}\] and \[{{4}^{o}}\] carbon atoms is [J & K 2005] |
| A. | 2, 3-dimethyl pentane |
| B. | 3-chloro-2, 3-dimethylpentane |
| C. | 2, 3, 4-trimethylpentane |
| D. | 3, 3-dimethylpentane |
| Answer» C. 2, 3, 4-trimethylpentane | |
| 4613. |
Full name of DDT is [KCET 1993] |
| A. | 1, 1, 1-trichloro-2, 2-bis (p-chlorophenyl) ethane |
| B. | 1, 1-dichloro-2, 2-diphenyl trimethylethane |
| C. | 1, 1-dichloro-2, 2-diphenyl trichloroethane |
| D. | None of these |
| Answer» B. 1, 1-dichloro-2, 2-diphenyl trimethylethane | |
| 4614. |
Which of the following is a primary halide [DCE 2004] |
| A. | Isopropyl iodide |
| B. | Secondary butyl iodide |
| C. | Tertiary butyl bromide |
| D. | Neo hexyl chloride |
| Answer» E. | |
| 4615. |
A mixture of \[N{{O}_{2}}\] and \[{{N}_{2}}{{O}_{4}}\] has a vapour density of 38.3 at \[300K\]. What is the number of moles of \[N{{O}_{2}}\] in \[100g\] of the mixture [Kerala PMT 2004] |
| A. | 0.043 |
| B. | 4.4 |
| C. | 3.4 |
| D. | 3.86 |
| E. | 0.437 |
| Answer» F. | |
| 4616. |
Containers \[A\] and \[B\] have same gases. Pressure, volume and temperature of \[A\] are all twice that of \[B,\] then the ratio of number of molecules of \[A\] and \[B\] are [AFMC 2004] |
| A. | 1 : 2 |
| B. | 2 |
| C. | 1 : 4 |
| D. | 4 |
| Answer» C. 1 : 4 | |
| 4617. |
At what pressure will a quantity of gas, which occupies \[100\,ml\] at a pressue of \[720\,mm\], occupy a volume of \[84\,ml\] [DPMT 2004] |
| A. | 736.18 mm |
| B. | 820.20 mm |
| C. | 784.15 mm |
| D. | 857.14 mm |
| Answer» E. | |
| 4618. |
The rate of diffusion of hydrogen gas is [MH CET 2003; Pb. CET 2000] |
| A. | 1.4 times to \[He\] gas |
| B. | Same as \[He\] gas |
| C. | 5 times to \[He\] gas |
| D. | 2 times to \[He\] gas |
| Answer» B. Same as \[He\] gas | |
| 4619. |
How will you separate mixture of two gases [AFMC 2004] |
| A. | Fractional distillation technique |
| B. | Grahams law of diffusion technique |
| C. | Osmosis |
| D. | Chromatography |
| Answer» C. Osmosis | |
| 4620. |
One litre oxygen gas at STP will weigh [Pb. CET 2004] |
| A. | 1.43 g |
| B. | 2.24 g |
| C. | 11.2 g |
| D. | 22.4 g |
| Answer» B. 2.24 g | |
| 4621. |
What is the ratio of diffusion rate of oxygen and hydrogen [Pb. CET 2003] |
| A. | 1 : 4 |
| B. | 4 : 1 |
| C. | 1 : 8 |
| D. | 8 : 1 |
| Answer» B. 4 : 1 | |
| 4622. |
The maximum number of molecules is present in [CBSE PMT 2004] |
| A. | 0.5 g of \[{{H}_{2}}\] gas |
| B. | 10 g of \[{{O}_{2}}\] gas |
| C. | 15 L of \[{{H}_{2}}\] gas at STP |
| D. | 5 L of \[{{N}_{2}}\] gas at STP |
| Answer» D. 5 L of \[{{N}_{2}}\] gas at STP | |
| 4623. |
At NTP, the density of a gas, whose molecular weight is 45 is [Pb. CET 2001, 03] |
| A. | 44.8 gm/litre |
| B. | 11.4 gm/litre |
| C. | 2 gm/ litre |
| D. | 3 gm/litre |
| Answer» D. 3 gm/litre | |
| 4624. |
Which of the following expression at constant pressure represents Charle's law [AFMC 1990] |
| A. | \[V\propto \frac{1}{T}\] |
| B. | \[V\propto \frac{1}{{{T}^{2}}}\] |
| C. | \[V\propto T\] |
| D. | \[V\] |
| Answer» D. \[V\] | |
| 4625. |
At S.T.P. \[1g\,CaC{{O}_{3}}\] on decomposition gives \[C{{O}_{2}}\] [Pb. CET 2000] |
| A. | 22.4 litre |
| B. | 2.24 litre |
| C. | 0.224 litre |
| D. | 11.2 litre |
| Answer» D. 11.2 litre | |
| 4626. |
At constant temperature and pressure which gas will diffuse first \[{{H}_{2}}\] or \[{{O}_{2}}\]? [Pb. CET 2000] |
| A. | Hydrogen |
| B. | Oxygen |
| C. | Both will diffuse in same time |
| D. | None of the above |
| Answer» B. Oxygen | |
| 4627. |
At what pressure a quantity of gas will occupy a volume of \[60\,ml\], if it occupies a volume of \[100ml\] at a pressure of \[720mm\]? (while temperature is constant) : [Pb. CET 2000] |
| A. | \[700\,mm\] |
| B. | \[800\,mm\] |
| C. | \[100\,mm\] |
| D. | \[1200\,mm\] |
| Answer» E. | |
| 4628. |
Which of the following gas mixture is not applicable for Dalton?s law of partial pressure [Pb. CET 2002] |
| A. | \[S{{O}_{2}}\] and \[C{{l}_{2}}\] |
| B. | \[C{{O}_{2}}\] and \[{{N}_{2}}\] |
| C. | \[CO\] and \[C{{O}_{2}}\] |
| D. | \[CO\] and \[{{N}_{2}}\] |
| Answer» B. \[C{{O}_{2}}\] and \[{{N}_{2}}\] | |
| 4629. |
If the four tubes of a car are filled to the same pressure with \[{{N}_{2}},\,{{O}_{2}},\,{{H}_{2}}\] and Ne separately, then which one will be filled first [Manipal PMT 2001] |
| A. | \[{{N}_{2}}\] |
| B. | \[{{O}_{2}}\] |
| C. | \[{{H}_{2}}\] |
| D. | Ne |
| Answer» D. Ne | |
| 4630. |
Who among the following scientists has not done any important work on gases [Bihar MADT 1980] |
| A. | Boyle |
| B. | Charles |
| C. | Avogadro |
| D. | Faraday |
| Answer» E. | |
| 4631. |
Five grams each of the following gases at \[{{87}^{o}}C\] and 750 mm pressure are taken. Which of them will have the least volume [MNR 1991] |
| A. | HF |
| B. | HCl |
| C. | HBr |
| D. | HI |
| Answer» C. HBr | |
| 4632. |
A pre-weighed vessel was filled with oxygen at N.T.P. and weighted. It was then evacuated, filled with \[S{{O}_{2}}\] at the same temperature and pressure, and again weighted. The weight of oxygen will be [NCERT 1989] |
| A. | The same as that of \[S{{O}_{2}}\] |
| B. | \[\frac{1}{2}\]that of\[S{{O}_{2}}\] |
| C. | Twice that of\[S{{O}_{2}}\] |
| D. | One fourth that of\[S{{O}_{2}}\] |
| Answer» C. Twice that of\[S{{O}_{2}}\] | |
| 4633. |
At constant pressure, the volume of fixed mass of an ideal gas is directly proportional to [EAMCET 1985] |
| A. | Absolute temperature |
| B. | Degree centigrade |
| C. | Degree Fahrenheit |
| D. | None |
| Answer» B. Degree centigrade | |
| 4634. |
The vapour density of a gas is 11.2. The volume occupied by 11.2 g of this gas at N.T.P. is [MNR 1982; CBSE PMT 1991] |
| A. | 1 L |
| B. | 11.2 L |
| C. | 22.4 L |
| D. | 20 L |
| Answer» C. 22.4 L | |
| 4635. |
A bottle of cold drink contains 200 ml liquid in which \[C{{O}_{2}}\] is 0.1 molar. Suppose \[C{{O}_{2}}\] behaves like an ideal gas, the volume of the dissolved \[C{{O}_{2}}\] at STP is [CBSE PMT 1991] |
| A. | 0.224 litre |
| B. | 0.448 litre |
| C. | 22.4 litre |
| D. | 2.24 litre |
| Answer» C. 22.4 litre | |
| 4636. |
Volume of 4.4 g of \[C{{O}_{2}}\] at NTP is [Pb. CET 1997] |
| A. | 22.4 L |
| B. | 44.8 L |
| C. | 2.24 L |
| D. | 4.48 L |
| Answer» D. 4.48 L | |
| 4637. |
The energy of an ideal gas depends only on its |
| A. | Pressure |
| B. | Volume |
| C. | Number of moles |
| D. | Temperature |
| Answer» E. | |
| 4638. |
Under what conditions will a pure sample of an ideal gas not only exhibit a pressure of 1 atm but also a concentration of 1 mole \[litre-1\] \[(R=0.082\,litre\,atm\,mo{{l}^{-1}}\,{{\deg }^{-1}})\] [CBSE PMT 1993] |
| A. | At STP |
| B. | When \[V=22.4\,litres\] |
| C. | When \[T=12\,K\] |
| D. | Impossible under any conditions |
| Answer» D. Impossible under any conditions | |
| 4639. |
4.4 g of a gas at STP occupies a volume of 2.24 L, the gas can be [Haryana CEET 2000] |
| A. | \[{{O}_{2}}\] |
| B. | CO |
| C. | \[N{{O}_{2}}\] |
| D. | \[C{{O}_{2}}\] |
| Answer» E. | |
| 4640. |
Given the reaction \[C(s)+{{H}_{2}}O(l)\to CO(g)+{{H}_{2}}(g)\] calculate the volume of the gases produced at STP from 48.0 g of carbon |
| A. | 179.2 L |
| B. | 89.6 L |
| C. | 44.8 L |
| D. | 22.4 L |
| Answer» B. 89.6 L | |
| 4641. |
Densities of two gases are in the ratio 1 : 2 and their temperatures are in the ratio 2 : 1, then the ratio of their respective pressures is [BHU 2000] |
| A. | 1 : 1 |
| B. | 1 : 2 |
| C. | 2 : 1 |
| D. | 4 : 1 |
| Answer» B. 1 : 2 | |
| 4642. |
At what temperature, the rate of effusion of \[{{N}_{2}}\] would be 1.625 times that of \[S{{O}_{2}}\] at \[{{50}^{o}}C\] [CBSE PMT 1996] |
| A. | 110 K |
| B. | 173 K |
| C. | 373 K |
| D. | 273 K |
| Answer» D. 273 K | |
| 4643. |
The rate of diffusion of methane at a given temperature is twice that of X. The molecular weight of X is [MNR 1995; Kerala CEE 2001] |
| A. | 64.0 |
| B. | 32.0 |
| C. | 40.0 |
| D. | 80.0 |
| Answer» B. 32.0 | |
| 4644. |
Two grams of hydrogen diffuse from a container in 10 minutes. How many grams of oxygen would diffuse through the same container in the same time under similar conditions [MNR 1980] |
| A. | 0.5 g |
| B. | 4 g |
| C. | 6 g |
| D. | 8 g |
| Answer» B. 4 g | |
| 4645. |
A gas diffuse at a rate which is twice that of another gas B. The ratio of molecular weights of A to B is [EAMCET 1986] |
| A. | 1.0 |
| B. | 0.75 |
| C. | 0.50 |
| D. | 0.25 |
| Answer» E. | |
| 4646. |
If 4 g of oxygen diffuse through a very narrow hole, how much hydrogen would have diffused under identical conditions [CPMT 1971] |
| A. | 16 g |
| B. | 1 g |
| C. | 1/4 g |
| D. | 64 g |
| Answer» C. 1/4 g | |
| 4647. |
Which of the following pairs will diffuse at the same rate through a porous plug [EAMCET 1990] |
| A. | CO, \[N{{O}_{2}}\] |
| B. | \[N{{O}_{2}},\,C{{O}_{2}}\] |
| C. | \[N{{H}_{3}},\,P{{H}_{3}}\] |
| D. | NO\[{{C}_{2}}{{H}_{6}}\] |
| Answer» E. | |
| 4648. |
A bottle of ammonia and a bottle of dry hydrogen chloride connected through a long tube are opened simultaneously at both ends, the white ammonium chloride ring first formed will be [IIT 1988] |
| A. | At the centre of the tube |
| B. | Near the hydrogen chloride bottle |
| C. | Near the ammonia bottle |
| D. | Throughout the length of the tube |
| Answer» C. Near the ammonia bottle | |
| 4649. |
The densities of two gases are in the ratio of 1 : 16. The ratio of their rates of diffusion is [CPMT 1995] |
| A. | 16 : 1 |
| B. | 4 : 1 |
| C. | 1 : 4 |
| D. | 1 : 16 |
| Answer» C. 1 : 4 | |
| 4650. |
Atmolysis is a process of |
| A. | Atomising gas molecules |
| B. | The breaking of atoms to sub-atomic particles |
| C. | Separation of gases from their gaseous mixture |
| D. | Changing of liquids to their vapour state |
| Answer» D. Changing of liquids to their vapour state | |