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.
| 601. |
The mass of \[BaC{{O}_{3}}\]produced when excess \[C{{O}_{2}}\] is bubbled through a solution of 0.205 mol \[Ba{{\left( OH \right)}_{2}}\]is: |
| A. | 81 g |
| B. | 40.5 g |
| C. | 20.25 g |
| D. | 162 g |
| Answer» C. 20.25 g | |
| 602. |
15 ml of \[{N}/{10}\;\] \[NaOH\] solution completely neutralises 12 ml of \[{{H}_{2}}S{{O}_{4}}\] solution. The normality of \[{{H}_{2}}S{{O}_{4}}\] solution will be [MP PET 1995] |
| A. | \[{N}/{5}\;\] |
| B. | \[{N}/{10}\;\] |
| C. | \[{N}/{{}}\;8\] |
| D. | \[N\] |
| Answer» D. \[N\] | |
| 603. |
A crystalline solid: |
| A. | changes abruptly from solid to liquid when heated |
| B. | has no definite melting point |
| C. | undergoes deformation of its geometry easily |
| D. | has an irregular three-dimensional arrangements |
| E. | softens slowly |
| Answer» B. has no definite melting point | |
| 604. |
Column A describes nature of bonding and Column B the solid having that type of bonding: A (Nature of bonding) B (solid) I. Van der Waals P. Al, Cd II. Ionic Q. \[C{{O}_{2}},{{H}_{2}}\] III. Metallic R. Si diamond IV. Covalent S. \[MgO,NaCl\] Correct matching of A and B is in alternate: |
| A. | I-P, II-Q, III-R, IV-S |
| B. | I-Q, II-S, III-P, IV-R |
| C. | I-Q, II-P, III-R, IV-S |
| D. | I-S, II-P, III-Q, IV-R |
| Answer» C. I-Q, II-P, III-R, IV-S | |
| 605. |
Select the right expression for determining packing fraction (PF) of \[NaCl\] unit cell (assume ideal), if ions along an edge diagonal are absent |
| A. | \[PF=\frac{\frac{4}{3}\pi \left( r_{+}^{3}+r_{-}^{3} \right)}{16\sqrt{2}r_{-}^{3}}\] |
| B. | \[PF=\frac{\frac{4}{3}\pi \left( \frac{5}{3}r_{+}^{3}+4r_{-}^{3} \right)}{16\sqrt{2}r_{-}^{3}}\] |
| C. | \[PF=\frac{\frac{4}{3}\pi \left( \frac{5}{2}r_{+}^{3}+r_{-}^{3} \right)}{16\sqrt{2}r_{-}^{3}}\] |
| D. | \[PF=\frac{\frac{4}{3}\pi \left( \frac{7}{2}r_{+}^{3}+r_{-}^{3} \right)}{16\sqrt{2}r_{-}^{3}}\] |
| Answer» C. \[PF=\frac{\frac{4}{3}\pi \left( \frac{5}{2}r_{+}^{3}+r_{-}^{3} \right)}{16\sqrt{2}r_{-}^{3}}\] | |
| 606. |
According to heisenberg uncertainty principle [AMU 1990; BCECE 2005] |
| A. | \[E=m{{c}^{2}}\] |
| B. | \[\Delta x\times \Delta p\ge \frac{h}{4\pi }\] |
| C. | \[\lambda =\frac{h}{p}\] |
| D. | \[\Delta x\times \Delta p=\frac{h}{6\pi }\] |
| Answer» C. \[\lambda =\frac{h}{p}\] | |
| 607. |
Which substance is not present in nucleic acid [MP PET/PMT 1998] |
| A. | Cytosine |
| B. | Adenine |
| C. | Thymine |
| D. | Guanidine |
| Answer» E. | |
| 608. |
The number of moles of sodium oxide in \[620g\] of it is [BHU 1992] |
| A. | 1 mol |
| B. | 10 moles |
| C. | 18 moles |
| D. | 100 moles |
| Answer» C. 18 moles | |
| 609. |
\[\Delta {{G}^{0}}(HI,\,g)\cong +1.7\,kJ\] . What is the equilibrium constant at \[{{25}^{o}}C\] for \[2HI(g)\] D \[{{H}_{2}}(g)+{{I}_{2}}(g)\] [KCET 1992] |
| A. | 24.0 |
| B. | 3.9 |
| C. | 2.0 |
| D. | 0.5 |
| Answer» E. | |
| 610. |
Concentrated \[HCl\] is 10 N, 1000 cc of \[1N\] \[HCl\] can be obtained by diluting [EAMCET 1978] |
| A. | 1 cc of conc. \[HCl\] to 1000 cc |
| B. | 10 cc of conc. \[HCl\] to 1000 cc |
| C. | 20 cc of conc. \[HCl\] to 1000 cc |
| D. | 100 cc of conc. \[HCl\] to 1000 cc |
| Answer» E. | |
| 611. |
The conjugate acid of \[{{H}_{2}}PO_{4}^{-}\] is [MP PET 1990] |
| A. | \[{{H}_{3}}P{{O}_{4}}\] |
| B. | \[{{H}_{2}}PO_{4}^{-}\] |
| C. | \[PO_{4}^{3-}\] |
| D. | \[{{H}_{3}}{{O}^{+}}\] |
| Answer» B. \[{{H}_{2}}PO_{4}^{-}\] | |
| 612. |
Which among the following species have the same number of electrons in its outermost as well as penultimate shell |
| A. | \[M{{g}^{2+}}\] |
| B. | \[{{O}^{2-}}\] |
| C. | \[{{F}^{-}}\] |
| D. | \[C{{a}^{2+}}\] |
| Answer» E. | |
| 613. |
An atom has 26 electrons and its atomic weight is 56. The number of neutrons in the nucleus of the atom will be |
| A. | 26 |
| B. | 30 |
| C. | 36 |
| D. | 56 |
| Answer» C. 36 | |
| 614. |
The \[I{{P}_{1}},\,\,I{{P}_{2}},\,\,I{{P}_{3}},\,\,I{{P}_{4}}\] and \[I{{P}_{5}}\] of an element are 7.1, 14.3, 34.5, 46.8, 162.2eV respectively. The element is likely to be |
| A. | Na |
| B. | Si |
| C. | F |
| D. | Ca |
| Answer» C. F | |
| 615. |
Match List I (atomic number of the element) with List II (position in the periodic table) and select the correct answer using the codes given below the lists - List I List II [A] 52 [p] s-block [B] 56 [q] p-block [C] 57 [r] d-block [D] 60 [s] f-block |
| A. | [A]\[\to \]q, [B]\[\to \]p, [C] \[\to \]r, [D]\[\to \]s |
| B. | [A]\[\to \]q, [B]\[\to \]p, [C]\[\to \]s, [D]\[\to \]r |
| C. | [A]\[\to \]p, [B]\[\to \]q, [C]\[\to \]r, [D]\[\to \]s |
| D. | [A]\[\to \]p, [B]\[\to \]b, [C]\[\to \]s, [D]\[\to \]r |
| Answer» B. [A]\[\to \]q, [B]\[\to \]p, [C]\[\to \]s, [D]\[\to \]r | |
| 616. |
cis and trans 2-butene are [BHU 1998; DPMT 2002] |
| A. | Conformational isomers |
| B. | Optical isomers |
| C. | Position isomers |
| D. | Geometrical isomers |
| Answer» E. | |
| 617. |
\[Xe{{F}_{6}}\] dissolves in anhydrous HF to give a good conducting solution which contains: |
| A. | \[{{H}^{+}}\] and \[XeF_{7}^{-}\] ion |
| B. | \[HF_{2}^{-}\] and \[XeF_{5}^{+}\] ions |
| C. | \[HXeF_{6}^{+}\] and \[{{F}^{-}}\] ions |
| D. | none of these |
| Answer» C. \[HXeF_{6}^{+}\] and \[{{F}^{-}}\] ions | |
| 618. |
The concentrated sulphuric acid that is peddled commercial is 95% \[{{H}_{2}}S{{O}_{4}}\] by weight. If the density of this commercial acid is \[1.834gc{{m}^{-3}}\], the molarity of this solution is |
| A. | 17.8 M |
| B. | 12.0.M |
| C. | 10.5 M |
| D. | 15.7 M |
| Answer» B. 12.0.M | |
| 619. |
Which of the following will have the highest F.P. at one atmosphere [BHU 1982; MP PMT 1987, MP PET/PMT 1988] |
| A. | \[0.1M\,NaCl\] solution |
| B. | \[0.1M\]sugar solution |
| C. | \[0.1M\,BaC{{l}_{2}}\] solution |
| D. | \[0.1M\,FeC{{l}_{3}}\] solution |
| Answer» C. \[0.1M\,BaC{{l}_{2}}\] solution | |
| 620. |
2.76 g of silver carbonate on being strongly heated yield a residue weighing [Pb. CET 2003] |
| A. | 2.16 g |
| B. | 2.48 g |
| C. | 2.64 g |
| D. | 2.32 g |
| Answer» B. 2.48 g | |
| 621. |
The gold number of A, B C and D are 0.04, 0.002, 10 and 25 respectively. Protective power of A, B, C and D are in order [DCE 2003] |
| A. | \[A>B>C>D\] |
| B. | \[B>A>C>D\] |
| C. | \[D>C>B>A\] |
| D. | \[C>A>B>D\] |
| Answer» C. \[D>C>B>A\] | |
| 622. |
In organic compounds, nitrogen is tested in Lassaigne's test as |
| A. | \[NaN{{H}_{2}}\] |
| B. | NaCN |
| C. | \[NaN{{O}_{2}}\] |
| D. | \[NaN{{O}_{3}}\] |
| Answer» C. \[NaN{{O}_{2}}\] | |
| 623. |
Silver ions are added to solution with \[[B{{r}^{-}}]=[C{{l}^{-}}]=[CO_{3}^{2-}]=[AsO_{4}^{3-}]=0.1\,M\]. Which compound will precipitate at lowest \[[A{{g}^{+}}]\]? |
| A. | \[AgBr({{K}_{sp}}=5\times {{10}^{-13}})\] |
| B. | \[AgCl({{K}_{sp}}=1.8\times {{10}^{-10}})\] |
| C. | \[A{{g}_{2}}C{{O}_{3}}({{K}_{sp}}=8\times {{10}^{-12}})\] |
| D. | \[A{{g}_{3}}As{{O}_{4}}({{K}_{sp}}={{10}^{-22}})\] |
| Answer» B. \[AgCl({{K}_{sp}}=1.8\times {{10}^{-10}})\] | |
| 624. |
pH of 2M HCl solution at \[25{}^\circ \] |
| A. | Ph < 0 |
| B. | 0 < pH > 1 |
| C. | 0 |
| D. | 1 |
| Answer» C. 0 | |
| 625. |
The species among the following, which can act as an acid and a base is [AIEEE 2002; KCET 2005] |
| A. | \[HSO_{4}^{-}\] |
| B. | \[SO_{4}^{2-}\] |
| C. | \[{{H}_{3}}{{O}^{+}}\] |
| D. | \[C{{l}^{-}}\] |
| Answer» B. \[SO_{4}^{2-}\] | |
| 626. |
The number of possible alkynes with molecular formula \[{{C}_{5}}{{H}_{8}}\] is [MP PMT 2000] |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» C. 4 | |
| 627. |
Reason for geometrical isomerism by 2-butene is [CBSE PMT 2000] |
| A. | Chiral carbon |
| B. | Free rotation about single bond |
| C. | Free rotation about double bond |
| D. | Restricted rotation about double bond |
| Answer» E. | |
| 628. |
At \[{{25}^{o}}C\], the highest osmotic pressure is exhibited by \[0.1M\] solution of [CBSE PMT 1994; AIIMS 2000] |
| A. | \[CaC{{l}_{2}}\] |
| B. | \[KCl\] |
| C. | Glucose |
| D. | Urea |
| Answer» B. \[KCl\] | |
| 629. |
\[Xe{{F}_{4}}\] on partial hydrolysis produces |
| A. | \[Xe{{F}_{4}}\] |
| B. | \[XeO{{F}_{2}}\] |
| C. | \[XeO{{F}_{4}}\] |
| D. | \[Xe{{O}_{3}}\] |
| Answer» C. \[XeO{{F}_{4}}\] | |
| 630. |
Which of the following mixture is chromic acid [Pb. PMT 2000] |
| A. | \[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\] and \[HCl\] |
| B. | \[{{K}_{2}}S{{O}_{4}}\] and conc. \[{{H}_{2}}S{{O}_{4}}\] |
| C. | \[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\] and conc. \[{{H}_{2}}S{{O}_{4}}\] |
| D. | \[{{H}_{2}}S{{O}_{4}}\]and\[HCl\] |
| Answer» D. \[{{H}_{2}}S{{O}_{4}}\]and\[HCl\] | |
| 631. |
Zig-zag motion (eratic motion) of particles in colloid was observed by [CPMT 1985] |
| A. | Tyndall |
| B. | Zsigmondy |
| C. | Robert brown |
| D. | Thomas Graham |
| Answer» D. Thomas Graham | |
| 632. |
The alum used for purifying water is [EAMCET 1999] |
| A. | Ferric alum |
| B. | Chrome alum |
| C. | Potash alum |
| D. | Ammonium alum |
| Answer» D. Ammonium alum | |
| 633. |
Raffinose is [Pb. PMT 2001] |
| A. | Trisaccharide |
| B. | Monosaccharide |
| C. | Disaccharide |
| D. | None of these |
| Answer» B. Monosaccharide | |
| 634. |
According to Heisenberg?s uncertainty principle, the product of uncertainties in position and velocities for an electron of mass \[9.1\times {{10}^{-31}}kg\] is [BHU 2004] |
| A. | \[2.8\times {{10}^{-3}}{{m}^{2}}{{s}^{-1}}\] |
| B. | \[3.8\times {{10}^{-5}}{{m}^{2}}{{s}^{-1}}\] |
| C. | \[5.8\times {{10}^{-5}}{{m}^{2}}{{s}^{-1}}\] |
| D. | \[6.8\times {{10}^{-6}}{{m}^{2}}{{s}^{-1}}\] |
| Answer» D. \[6.8\times {{10}^{-6}}{{m}^{2}}{{s}^{-1}}\] | |
| 635. |
If an electron has spin quantum number of \[+\frac{1}{2}\] and a magnetic quantum number of \[-1\], it cannot be presented in an |
| A. | \[d\]-orbital |
| B. | \[f\]-orbital |
| C. | \[p\]-orbital |
| D. | \[s\]-orbital |
| Answer» E. | |
| 636. |
What is the electronic configuration of \[C{{u}^{2+}}(Z=29)\] of least position |
| A. | \[[Ar]\,4{{s}^{1}}3{{d}^{8}}\] |
| B. | \[[Ar]\,4{{s}^{2}}3{{d}^{10}}4{{p}^{1}}\] |
| C. | \[[Ar]\,4{{s}^{1}}3{{d}^{10}}\] |
| D. | \[[Ar]\,3{{d}^{9}}\] |
| Answer» E. | |
| 637. |
Minimum concentration of electrolyte which can precipitate any sol is [BIT 1992] |
| A. | Peptization value |
| B. | Gold number |
| C. | Avogadro's number |
| D. | Flocculation value |
| Answer» E. | |
| 638. |
What is the maximum number of electrons that can be accomodated in an atom in which the highest principal quantum number value is 4? |
| A. | 10 |
| B. | 18 |
| C. | 36 |
| D. | 54 |
| Answer» D. 54 | |
| 639. |
The velocity constant of a reaction at 280 K is \[1.6\times {{10}^{-4}}\]. The velocity constant of the same reaction at 300 K is |
| A. | \[1.6\times {{10}^{-4}}\] |
| B. | \[0.8\times {{10}^{-4}}\] |
| C. | \[6.4\times {{10}^{-4}}\] |
| D. | \[3.2\times {{10}^{-4}}\] |
| Answer» D. \[3.2\times {{10}^{-4}}\] | |
| 640. |
Decomposition of A follows first order kinetics by the following equation.\[4A(g)\xrightarrow{{}}B(g)+2C(g)\]If initially, total pressure was 800 mm of Hg and after 10 minutes it is found to be 650 mm of Hg. What is half-life of A? (Assume only A is present initially). |
| A. | 10 mins |
| B. | 5 mins |
| C. | 7.5 mins |
| D. | 15 mins |
| Answer» C. 7.5 mins | |
| 641. |
\[100\ mL\] of \[P{{H}_{3}}\] on decomposition produced phosphorus and hydrogen. The change in volume is [MNR 1986] |
| A. | \[50\ mL\] increase |
| B. | \[500\ mL\] decrease |
| C. | \[900\ mL\] decrease |
| D. | Nil. |
| Answer» B. \[500\ mL\] decrease | |
| 642. |
The nucleus of an element contain 9 protons. Its valency would be [MP PET 2004] |
| A. | 1 |
| B. | 3 |
| C. | 2 |
| D. | 5 |
| Answer» B. 3 | |
| 643. |
Nylon threads are made of [MP PMT 2001, 03; AIEEE 2003] |
| A. | Polyvinyl polymer |
| B. | Polyester polymer |
| C. | Polyamide polymer |
| D. | Polyethylene polymer |
| Answer» D. Polyethylene polymer | |
| 644. |
Number of lone pairs around phosphorus in \[PC{{l}_{5}},PCl_{4}^{+}\] and \[PCl_{6}^{-}\] are respectively |
| A. | 0, 1, 2 |
| B. | 0, 0, 0 |
| C. | 1, 2, 3 |
| D. | 0, 2, 1 |
| Answer» C. 1, 2, 3 | |
| 645. |
Which one shows maximum hydrogen bonding? |
| A. | \[{{H}_{2}}O\] |
| B. | \[{{H}_{2}}Se\] |
| C. | \[{{H}_{2}}S\] |
| D. | HF |
| Answer» E. | |
| 646. |
Iron sulphide is heated in air to form A, an oxide of sulphur. A is dissolved in water to give an acid. The basicity of this acid is |
| A. | 2 |
| B. | 3 |
| C. | 1 |
| D. | zero |
| Answer» B. 3 | |
| 647. |
Which of the following has chiral structure |
| A. | \[C{{H}_{3}}-\overset{C{{H}_{3}}\,\,}{\mathop{\overset{|\,\,\,\,\,\,\,\,\,}{\mathop{CH-\,}}\,}}\,C{{H}_{2}}COOH\] |
| B. | \[C{{H}_{3}}-CH=CH-C{{H}_{3}}\] |
| C. | \[C{{H}_{3}}-\overset{C{{H}_{3}}}{\mathop{\overset{|\,\,\,\,\,\,\,\,}{\mathop{CH-\,}}\,}}\,C{{H}_{2}}OH\] |
| D. | \[C{{H}_{3}}-CHOH-C{{H}_{2}}C{{H}_{3}}\] |
| Answer» E. | |
| 648. |
If 100 ml of 1 N sulphuric acid were mixed with 100 ml of 1 M sodium hydroxide, the solution will be [MP PET 1999] |
| A. | Acidic |
| B. | Basic |
| C. | Neutral |
| D. | Slightly acidic |
| Answer» D. Slightly acidic | |
| 649. |
The compound insoluble in acetic acid is [CPMT 1989] |
| A. | Calcium oxide |
| B. | Calcium carbonate |
| C. | Calcium oxalate |
| D. | Calcium hydroxide |
| Answer» D. Calcium hydroxide | |
| 650. |
Surface tension of lyophilic sols is [MP PMT 2002] |
| A. | Lower than that of \[{{H}_{2}}O\] |
| B. | More than that of \[{{H}_{2}}O\] |
| C. | Equal to that of \[{{H}_{2}}O\] |
| D. | None of these |
| Answer» B. More than that of \[{{H}_{2}}O\] | |