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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.
| 4701. |
Pressure remaining the same, the volume of a given mass of an ideal gas increases for every degree centigrade rise in temperature by definite fraction of its volume at [CBSE PMT 1989] |
| A. | \[{{0}^{o}}C\] |
| B. | Its critical temperature |
| C. | Absolute zero |
| D. | Its Boyle temperature |
| Answer» B. Its critical temperature | |
| 4702. |
A 10 g of a gas at atmospheric pressure is cooled from \[{{273}^{o}}C\] to \[{{0}^{o}}C\] keeping the volume constant, its pressure would become |
| A. | 1/2 atm |
| B. | 1/273 atm |
| C. | 2 atm |
| D. | 273 atm |
| Answer» B. 1/273 atm | |
| 4703. |
Equation of Boyle's law is [DPMT 2005] |
| A. | \[\frac{dP}{p}=-\frac{dV}{V}\] |
| B. | \[\frac{dP}{P}=+\frac{dV}{V}\] |
| C. | \[\frac{{{d}^{2}}P}{P}=-\frac{dV}{dT}\] |
| D. | \[\frac{{{d}^{2}}P}{P}=+\frac{{{d}^{2}}V}{dT}\] |
| Answer» B. \[\frac{dP}{P}=+\frac{dV}{V}\] | |
| 4704. |
At what temperature, the sample of neon gas would be heated to double of its pressure, if the initial volume of gas is/are reduced to 15% at \[{{75}^{o}}C\] [Kerala CET 2005] |
| A. | \[{{319}^{o}}C\] |
| B. | \[{{592}^{o}}C\] |
| C. | \[{{128}^{o}}C\] |
| D. | \[{{60}^{o}}C\] |
| E. | \[{{90}^{o}}C\] |
| Answer» B. \[{{592}^{o}}C\] | |
| 4705. |
If the absolute temperature of an ideal gas become double and pressure become half, the volume of gas would be [Kerala CET 2005] |
| A. | Remain unchange |
| B. | Will be double |
| C. | Will be four time |
| D. | will be half |
| E. | Will be one fourth |
| Answer» D. will be half | |
| 4706. |
What will be the volume of the mixture after the reaction? \[\underset{\text{4 litre}}{\mathop{N{{H}_{3}}}}\,+\underset{\text{1}\text{.5 litre}}{\mathop{HCl}}\,\to \underset{\text{(solid)}}{\mathop{N{{H}_{4}}Cl}}\,\] [BVP 2004] |
| A. | 0.5 litre |
| B. | 1 litre |
| C. | 2.5 litre |
| D. | 0.1 litre |
| Answer» D. 0.1 litre | |
| 4707. |
The pressure and temperature of \[4d{{m}^{3}}\] of carbon dioxide gas are doubled. Then the volume of carbon dioxide gas would be [KCET 2004] |
| A. | \[2\,d{{m}^{3}}\] |
| B. | \[3d{{m}^{3}}\] |
| C. | \[4\,d{{m}^{3}}\] |
| D. | \[8\,d{{m}^{3}}\] |
| Answer» D. \[8\,d{{m}^{3}}\] | |
| 4708. |
A certain mass of gas occupies a volume of 300 c.c. at 27C and 620 mm pressure. The volume of this gas at \[{{47}^{o}}C\] and 640 mm pressure will be [MH CET 2003] |
| A. | 400 c.c. |
| B. | 510 c.c. |
| C. | 310 c.c. |
| D. | 350 c.c. |
| Answer» D. 350 c.c. | |
| 4709. |
A cylinder of 5 litres capacity, filled with air at NTP is connected with another evacuated cylinder of 30 litres of capacity. The resultant air pressure in both the cylinders will be [BHU 2004] |
| A. | 10.8 cm of Hg |
| B. | 14.9cm of Hg |
| C. | 21.8 cm of Hg |
| D. | 38.8 cm of Hg |
| Answer» B. 14.9cm of Hg | |
| 4710. |
Use of hot air balloons in sports and meteorological obsevations is an application of [Kerala MEE 2002] |
| A. | Boyle's law |
| B. | Newtonic law |
| C. | Kelvin's law |
| D. | Charle's law |
| Answer» E. | |
| 4711. |
If P, V, T represent pressure, volume and temperature of the gas, the correct representation of Boyle's law is [BIT Ranchi 1988] |
| A. | \[V\propto \frac{1}{T}\] (at constant P) |
| B. | \[PV=RT\] |
| C. | \[V\propto 1/P\] (at constant T) |
| D. | \[PV=nRT\] |
| Answer» D. \[PV=nRT\] | |
| 4712. |
When two liquid A and B are mixed then their boiling points becomes greater than both of them. What is the nature of this solution |
| A. | Ideal solution |
| B. | Positive deviation with non ideal solution |
| C. | Negative deviation with non ideal solution |
| D. | Normal solution |
| Answer» D. Normal solution | |
| 4713. |
Which property is shown by an ideal solution [MP PET 2002] |
| A. | It follows Raoult's law |
| B. | \[\Delta {{H}_{mix}}=0\] |
| C. | \[\Delta {{V}_{mix}}=0\] |
| D. | All of these |
| Answer» E. | |
| 4714. |
All form ideal solutions except [DPMT 1983; MP PET 1997] |
| A. | \[{{C}_{2}}{{H}_{5}}Br\] and \[{{C}_{2}}{{H}_{5}}I\] |
| B. | \[{{C}_{6}}{{H}_{5}}Cl\] and \[{{C}_{6}}{{H}_{5}}Br\] |
| C. | \[{{C}_{6}}{{H}_{6}}\] and \[{{C}_{6}}{{H}_{5}}C{{H}_{3}}\] |
| D. | \[{{C}_{2}}{{H}_{5}}I\] and \[{{C}_{2}}{{H}_{5}}OH\] |
| Answer» E. | |
| 4715. |
Which one of the following mixtures can be separated into pure components by fractional distillation [CPMT 1987] |
| A. | Benzene - toluene |
| B. | Water - ethyl alcohol |
| C. | Water - nitric acid |
| D. | Water - hydrochloric acid |
| Answer» B. Water - ethyl alcohol | |
| 4716. |
An ideal solution is that which [MP PMT 1996] |
| A. | Shows positive deviation from Raoult's law |
| B. | Shows negative deviation from Raoult's law |
| C. | Has no connection with Raoult's law |
| D. | Obeys Raoult's law |
| Answer» E. | |
| 4717. |
Which pair from the following will not form an ideal solution |
| A. | \[CC{{l}_{4}}+SiC{{l}_{4}}\] |
| B. | \[{{H}_{2}}O+{{C}_{4}}{{H}_{9}}OH\] |
| C. | \[{{C}_{2}}{{H}_{5}}Br+{{C}_{2}}{{H}_{5}}I\] |
| D. | \[{{C}_{6}}{{H}_{14}}+{{C}_{7}}{{H}_{16}}\] |
| Answer» C. \[{{C}_{2}}{{H}_{5}}Br+{{C}_{2}}{{H}_{5}}I\] | |
| 4718. |
Liquids A and B form an ideal solution [AIEEE 2003] |
| A. | The enthalpy of mixing is zero |
| B. | The entropy of mixing is zero |
| C. | The free energy of mixing is zero |
| D. | The free energy as well as the entropy of mixing are each zero |
| Answer» B. The entropy of mixing is zero | |
| 4719. |
A non-ideal solution was prepared by mixing 30 ml chloroform and 50 ml acetone. The volume of mixture will be [Pb. CET 2003] |
| A. | > 80 ml |
| B. | < 80 ml |
| C. | |
| D. | \[\ge \] 80 ml |
| Answer» C. | |
| 4720. |
Which of the following is an ideal solution |
| A. | Water + ethanol |
| B. | Chloroform + carbon tetrachloride |
| C. | Benzene + toluene |
| D. | Water + hydrochloric acid |
| Answer» D. Water + hydrochloric acid | |
| 4721. |
A mixture of benzene and toluene forms [MP PMT 1993] |
| A. | An ideal solution |
| B. | Non-ideal solution |
| C. | Suspension |
| D. | Emulsion |
| Answer» B. Non-ideal solution | |
| 4722. |
Which of the following does not show negative deviation from Raoult?s law [MP PMT 2001] |
| A. | Acetone-Chloroform |
| B. | Acetone-Benzene |
| C. | Chloroform-Ether |
| D. | Chloroform-Benzene |
| Answer» C. Chloroform-Ether | |
| 4723. |
Which of the following is not correct for ideal solution [JIPMER 1997] |
| A. | \[\Delta {{S}_{mix}}=0\] |
| B. | \[\Delta {{H}_{mix}}=0\] |
| C. | It obeys Raoult's law |
| D. | \[\Delta {{V}_{mix}}=0\] |
| Answer» B. \[\Delta {{H}_{mix}}=0\] | |
| 4724. |
Which of the following mixture shows positive deviation by ideal behaviour |
| A. | \[CHC{{l}_{3}}+{{(C{{H}_{3}})}_{2}}CO\] |
| B. | \[{{C}_{6}}{{H}_{6}}+{{C}_{6}}{{H}_{5}}C{{H}_{3}}\] |
| C. | \[{{H}_{2}}O+HCl\] |
| D. | \[CC{{l}_{4}}+CHC{{l}_{3}}\] |
| Answer» E. | |
| 4725. |
Which of the following does not show positive deviation from Raoult?s law [MP PMT 2000] |
| A. | Benzene-Chloroform |
| B. | Benzene-Acetone |
| C. | Benzene-Ethanol |
| D. | Benzene-Carbon tetrachloride |
| Answer» B. Benzene-Acetone | |
| 4726. |
The liquid pair benzene-toluene shows [MP PET 1995] |
| A. | Irregular deviation from Raoult's law |
| B. | Negative deviation from Raoult's law |
| C. | Positive deviation from Raoult's law |
| D. | Practically no deviation from Raoult's law |
| Answer» E. | |
| 4727. |
The solution which shows negative or positive deviation by Raoult's law, is called |
| A. | Ideal solution |
| B. | Real solution |
| C. | Non-ideal solution |
| D. | Colloidal solution |
| Answer» D. Colloidal solution | |
| 4728. |
Which one of the following is non-ideal solution |
| A. | Benzene + toluene |
| B. | \[n\]-hexane + \[n\]-heptane |
| C. | Ethyl bromide + ethyl iodide |
| D. | \[CC{{l}_{4}}+CHC{{l}_{3}}\] |
| Answer» E. | |
| 4729. |
Which of the following is true when components forming an ideal solution are mixed [AMU 2000] |
| A. | \[\Delta {{H}_{m}}=\Delta {{V}_{m}}=0\] |
| B. | \[\Delta {{H}_{m}}>\Delta {{V}_{m}}\] |
| C. | \[\Delta {{H}_{m}}<\Delta {{V}_{m}}\] |
| D. | \[\Delta {{H}_{m}}=\Delta {{V}_{m}}=1\] |
| Answer» B. \[\Delta {{H}_{m}}>\Delta {{V}_{m}}\] | |
| 4730. |
When acetone is added to chloroform, then hydrogen bond is formed between them.These liquids show |
| A. | Positive deviation from Raoult's law |
| B. | Negative deviation from Raoult's law |
| C. | No deviation from Raoult's law |
| D. | Volume is slightly increased |
| Answer» C. No deviation from Raoult's law | |
| 4731. |
Identify the mixture that shows positive deviation from Raoult?s law [Kerala CET (Engg.) 2002] |
| A. | \[CHC{{l}_{3}}+{{(C{{H}_{3}})}_{2}}CO\] |
| B. | \[{{(C{{H}_{3}})}_{2}}CO+{{C}_{6}}{{H}_{5}}N{{H}_{2}}\] |
| C. | \[CHC{{l}_{3}}+{{C}_{6}}{{H}_{6}}\] |
| D. | \[{{(C{{H}_{3}})}_{2}}CO+C{{S}_{2}}\] |
| E. | \[{{C}_{6}}{{H}_{5}}N+C{{H}_{3}}COOH\] |
| Answer» E. \[{{C}_{6}}{{H}_{5}}N+C{{H}_{3}}COOH\] | |
| 4732. |
All form ideal solution except [UPSEAT 2001] |
| A. | \[{{C}_{2}}{{H}_{5}}Br\] and \[{{C}_{2}}{{H}_{5}}I\] |
| B. | \[{{C}_{2}}{{H}_{5}}Cl\] and \[{{C}_{6}}{{H}_{5}}Br\] |
| C. | \[{{C}_{6}}{{H}_{6}}\] and \[{{C}_{6}}{{H}_{5}}C{{H}_{3}}\] |
| D. | \[{{C}_{2}}{{H}_{5}}I\] and \[{{C}_{2}}{{H}_{5}}OH\] |
| Answer» E. | |
| 4733. |
A mixture of liquid showing positive deviation in Raoult's law is |
| A. | \[{{(C{{H}_{3}})}_{2}}CO+{{C}_{2}}{{H}_{5}}OH\] |
| B. | \[{{(C{{H}_{3}})}_{2}}CO+CHC{{l}_{3}}\] |
| C. | \[{{({{C}_{2}}{{H}_{5}})}_{2}}O+CHC{{l}_{3}}\] |
| D. | \[{{(C{{H}_{3}})}_{2}}CO+{{C}_{6}}{{H}_{5}}N{{H}_{2}}\] |
| Answer» B. \[{{(C{{H}_{3}})}_{2}}CO+CHC{{l}_{3}}\] | |
| 4734. |
An example of near ideal solution is |
| A. | \[n\]-heptane and \[n\]-hexane |
| B. | \[C{{H}_{3}}COOH+{{C}_{5}}{{H}_{5}}N\] |
| C. | \[CHC{{l}_{3}}+{{({{C}_{2}}{{H}_{5}})}_{2}}O\] |
| D. | \[{{H}_{2}}O+HN{{O}_{3}}\] |
| Answer» B. \[C{{H}_{3}}COOH+{{C}_{5}}{{H}_{5}}N\] | |
| 4735. |
A solution that obeys Raoult's law is [EAMCET 1993] |
| A. | Normal |
| B. | Molar |
| C. | Ideal |
| D. | Saturated |
| Answer» D. Saturated | |
| 4736. |
In mixture A and B components show ?ve deviation as [AIEEE 2002] |
| A. | \[\Delta {{V}_{\text{mix}}}>0\] |
| B. | \[\Delta {{H}_{\text{mix}}}<0\] |
| C. | A-B interaction is weaker than A-A and B-B interaction |
| D. | A-B interaction is strong than A-A and B-B interaction |
| Answer» C. A-B interaction is weaker than A-A and B-B interaction | |
| 4737. |
Which of the following liquid pairs shows a positive deviation from Raoult's law [MP PET 1993; UPSEAT 2001; AIEEE 2004] |
| A. | Water-nitric acid |
| B. | Benzene-methanol |
| C. | Water-hydrochloric acid |
| D. | Acetone-chloroform |
| Answer» C. Water-hydrochloric acid | |
| 4738. |
The pH of 0.1 M acetic acid is 3, the dissociation constant of acid will be |
| A. | \[1.0\times {{10}^{-4}}\] |
| B. | \[1.0\times {{10}^{-5}}\] |
| C. | \[1.0\times {{10}^{-3}}\] |
| D. | \[1.0\times {{10}^{-8}}\] |
| Answer» C. \[1.0\times {{10}^{-3}}\] | |
| 4739. |
How many millilitres of \[6.0\,\,M\]hydrochloric acid should be used to prepare \[150\,\,ml\] of a solution which is \[0.30\,\,M\] in hydrogen ion [Pb. PMT 1998] |
| A. | 3.0 |
| B. | 7.5 |
| C. | 9.3 |
| D. | 30 |
| Answer» C. 9.3 | |
| 4740. |
When \[100\,\,ml\] of \[M/10\,\,NaOH\] solution and \[50\,\,ml\] of \[M/5\,\,HCl\] solution are mixed, the \[pH\] of resulting solution would be [RPMT 1997] |
| A. | 0 |
| B. | 7 |
| C. | Less than 7 |
| D. | More than 7 |
| Answer» C. Less than 7 | |
| 4741. |
\[pH\] of \[HCl\,({{10}^{-12}}M)\]is [CPMT 1997; Pb. PET/PMT 1999] |
| A. | 12 |
| B. | \[-12\] |
| C. | \[\approx 7\] |
| D. | 14 |
| Answer» D. 14 | |
| 4742. |
Which oxychloride has maximum \[pH\] [CPMT 1997] |
| A. | \[NaClO\] |
| B. | \[NaCl{{O}_{2}}\] |
| C. | \[NaCl{{O}_{3}}\] |
| D. | \[NaCl{{O}_{4}}\] |
| Answer» B. \[NaCl{{O}_{2}}\] | |
| 4743. |
At \[{{80}^{o}}C,\] distilled water has \[[{{H}_{3}}{{O}^{+}}]\] concentration equal to \[1\times {{10}^{-6}}\,\,mole/litre.\] The value of \[{{K}_{w}}\]at this temperature will be [CBSE PMT 1994; RPMT 2000; AFMC 2001; AIIMS 2002; BHU 2002] |
| A. | \[1\times {{10}^{-6}}\] |
| B. | \[1\times {{10}^{-9}}\] |
| C. | \[1\times {{10}^{-12}}\] |
| D. | \[{{K}_{SP}}\] |
| Answer» D. \[{{K}_{SP}}\] | |
| 4744. |
The \[pH\] value of \[0.1\,\,M\,\,NaOH\] solution is (when there is a given reaction \[[{{H}^{+}}]\,[O{{H}^{-}}]={{10}^{-15}}\]) [CPMT 1997] |
| A. | 13 |
| B. | 12 |
| C. | 11 |
| D. | 2 |
| Answer» B. 12 | |
| 4745. |
The \[pH\]of water at \[{{25}^{o}}C\] is nearly [CPMT 1986, 89, 90, 93; CBSE PMT 1989; MADT Bihar 1995] |
| A. | 2 |
| B. | 7 |
| C. | 10 |
| D. | 12 |
| Answer» C. 10 | |
| 4746. |
Which of the following does not make any change in \[pH\] when added to \[10\,\,ml\] dilute \[HCl\] [NCERT 1975] |
| A. | 5 ml pure water |
| B. | 20 ml pure water |
| C. | 10 \[ml\,\,HCl\] |
| D. | Same 20 \[ml\]dilute \[HCl\] |
| Answer» E. | |
| 4747. |
The defination of \[pH\]is [EAMCET 1980; UPSEAT 2001] |
| A. | \[pH=\log \frac{1}{[{{H}^{+}}]}\] |
| B. | \[pH=\log \,[{{H}^{+}}]\] |
| C. | \[pH=-\log \frac{1}{[{{H}^{+}}]}\] |
| D. | \[pH=-{{\log }^{[{{H}^{+}}]}}\] |
| Answer» B. \[pH=\log \,[{{H}^{+}}]\] | |
| 4748. |
If pOH of a solution is 6.0, then its pH will be [MP PMT 1987] |
| A. | 6 |
| B. | 10 |
| C. | 8 |
| D. | 14 |
| Answer» D. 14 | |
| 4749. |
Which solution contains maximum number of \[{{H}^{+}}\]ion |
| A. | 0.1 M \[HCl\] |
| B. | 0.1 M \[N{{H}_{4}}Cl\] |
| C. | 0.1 M \[NaHC{{O}_{3}}\] |
| D. | 0.1 M |
| Answer» B. 0.1 M \[N{{H}_{4}}Cl\] | |
| 4750. |
In a solution of \[pH=5,\] more acid is added in order to reduce the \[pH=2.\] The increase in hydrogen ion concentration is [MP PET 1989; CPMT 1990] |
| A. | 100 times |
| B. | 1000 times |
| C. | 3 times |
| D. | 5 times |
| Answer» C. 3 times | |