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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.
| 10201. |
If NaCl is doped with mol% \[SrC{{l}_{2}},\] what is the concentration of cation vacancies? |
| A. | \[6.02\times {{10}^{18}}mo{{l}^{-1}}\] |
| B. | \[6.02\times {{10}^{19}}mo{{l}^{-1}}\] |
| C. | \[6.02\times {{10}^{23}}mo{{l}^{-1}}\] |
| D. | \[6.02\times {{10}^{26}}mo{{l}^{-1}}\] |
| Answer» B. \[6.02\times {{10}^{19}}mo{{l}^{-1}}\] | |
| 10202. |
A solid AB has NaCl structure. If the radius of action \[{{A}^{+}}\] is 170 pm, calculate the maximum possible radius of the anion \[{{B}^{-}}\] |
| A. | 210.3 pm |
| B. | 397.4 pm |
| C. | 410.6 pm |
| D. | 347.9 pm |
| Answer» D. 347.9 pm | |
| 10203. |
In orthorhombic, the value of a, b and c are respectively 4.2\[\overset{\text{o}}{\mathop{\text{A}}}\,\], 8.6\[\overset{\text{o}}{\mathop{\text{A}}}\,\] and 8.3\[\overset{\text{o}}{\mathop{\text{A}}}\,\]. Given the molecular mass off solute is 155 gm \[mo{{l}^{-1}}\] and that of density is 3.3 g/cc, the number of formula units per unit cell is |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 6 |
| Answer» D. 6 | |
| 10204. |
LiCl has NaCl type structure with edge length 512 pm. Assuming that the \[L{{i}^{+}}\] ion is small enough that the chloride ions are in contact, then radius of \[C{{I}^{-}}\] ion is |
| A. | 223 pm |
| B. | 224 pm |
| C. | 181 pm |
| D. | 362 pm |
| Answer» E. | |
| 10205. |
Copper crystallises in a structure of face centered cubic unit cell. The atomic radius of copper is 1.28 \[\overset{\text{o}}{\mathop{\text{A}}}\,\]. What is the axial length on an edge of copper? |
| A. | 2.16\[\overset{\text{o}}{\mathop{\text{A}}}\,\] |
| B. | 3.62\[\overset{\text{o}}{\mathop{\text{A}}}\,\] |
| C. | 3.94\[\overset{\text{o}}{\mathop{\text{A}}}\,\] |
| D. | 4.15\[\overset{\text{o}}{\mathop{\text{A}}}\,\] |
| Answer» C. 3.94\[\overset{\text{o}}{\mathop{\text{A}}}\,\] | |
| 10206. |
The basic building unit of all silicates is [UPSEAT 2002] |
| A. | \[Si{{O}_{4}}\] square planar |
| B. | \[{{[Si{{O}_{4}}]}^{4-}}\] tetrahedron |
| C. | \[Si{{O}_{4}}\] octahedron |
| D. | \[Si{{O}_{4}}\] linear |
| Answer» C. \[Si{{O}_{4}}\] octahedron | |
| 10207. |
What type of crystal defect is indicated in the diagram below [AIEEE 2004] \[N{{a}^{+}}\,\,C{{l}^{-}}\,\,N{{a}^{+}}\,\,C{{l}^{-}}\,\,\,N{{a}^{+}}\,\,\,C{{l}^{-}}\] \[C{{l}^{-}}\] ¨ \[C{{l}^{-}}\] \[N{{a}^{+}}\] ¨ \[N{{a}^{+}}\] \[N{{a}^{+}}\] \[C{{l}^{-}}\]¨ \[C{{l}^{-}}\] \[N{{a}^{+}}\] \[C{{l}^{-}}\] \[C{{l}^{-}}\] \[N{{a}^{+}}\] \[C{{l}^{-}}\] \[N{{a}^{+}}\] ¨ \[N{{a}^{+}}\] |
| A. | Interstitial defect |
| B. | Schottky defect |
| C. | Frenkel defect |
| D. | Frenkel and Schottky defects |
| Answer» C. Frenkel defect | |
| 10208. |
Coordination number for \[Cu\] is [AMU 1982] |
| A. | 1 |
| B. | 6 |
| C. | 8 |
| D. | 12 |
| Answer» E. | |
| 10209. |
In the calcium fluoride structure the co-ordination number of the cation and anions are respectively [J & K 2005] |
| A. | 6, 6 |
| B. | 8, 4 |
| C. | 4, 4 |
| D. | 4, 8 |
| Answer» C. 4, 4 | |
| 10210. |
The difference of number of water molecules in gypsum and plaster of Paris is |
| A. | \[\frac{5}{1}\] |
| B. | 2 |
| C. | \[1/2\] |
| D. | \[1\frac{1}{2}\] |
| Answer» E. | |
| 10211. |
Acidified solution of sodium thiosulphate is unstable because in thiosulphate |
| A. | the sulphur atoms are at unstable oxidation state of \[+2\] |
| B. | the two sulphur atoms are at different oxidation states of \[+6\] and \[-2\] |
| C. | the \[S-S\] bond are unstable bonds. |
| D. | sulphur is in zero oxidation state. |
| Answer» C. the \[S-S\] bond are unstable bonds. | |
| 10212. |
Sodium carbonate solution in water is alkaline due to |
| A. | hydrolysis of \[N{{a}^{+}}\] |
| B. | hydrolysis of \[CO_{3}^{2-}\] |
| C. | hydrolysis of both \[N{{a}^{+}}\] and \[CO_{3}^{2-}\] ions |
| D. | None of these |
| Answer» C. hydrolysis of both \[N{{a}^{+}}\] and \[CO_{3}^{2-}\] ions | |
| 10213. |
Which or me following are found in biological fluids \[N{{a}^{+}},M{{g}^{2+}},C{{a}^{2+}},{{K}^{+}},S{{r}^{2+}},L{{i}^{+}}\] and \[B{{a}^{2+}}\]? |
| A. | \[M{{g}^{2+}},C{{a}^{2+}},\] and \[S{{r}^{2+}}\] |
| B. | \[N{{a}^{2+}}\] and \[{{K}^{+}}\] |
| C. | \[N{{a}^{+}},{{K}^{+}},M{{g}^{2+}}\] and \[C{{a}^{2+}}\] |
| D. | \[S{{r}^{+}},Li\] and \[B{{a}^{2+}}\] |
| Answer» D. \[S{{r}^{+}},Li\] and \[B{{a}^{2+}}\] | |
| 10214. |
The main oxides formed on combustion of \[Li,\text{ }Na\] and K in excess of air are, respectively: |
| A. | \[L{{i}_{2}}{{O}_{2}},N{{a}_{2}}{{O}_{2}}\] and \[K{{O}_{2}}\] |
| B. | \[L{{i}_{2}}O,N{{a}_{2}}{{O}_{2}}\]and \[K{{O}_{2}}\] |
| C. | \[L{{i}_{2}}O,N{{a}_{2}}O\] and \[K{{O}_{2}}\] |
| D. | \[Li{{O}_{2}},N{{a}_{2}}{{O}_{2}}\]and \[{{K}_{2}}O\] |
| Answer» C. \[L{{i}_{2}}O,N{{a}_{2}}O\] and \[K{{O}_{2}}\] | |
| 10215. |
Melting point of calcium halides decreases in the order |
| A. | \[Ca{{F}_{2}}>CaC{{l}_{2}}>CaB{{r}_{2}}>Ca{{I}_{2}}\] |
| B. | \[Ca{{I}_{2}}>CaB{{r}_{2}}>CaC{{l}_{2}}>Ca{{F}_{2}}\] |
| C. | \[CaB{{r}_{2}}>Ca{{I}_{2}}>Ca{{F}_{2}}>CaC{{l}_{2}}\] |
| D. | \[CaC{{l}_{2}}>CaB{{r}_{2}}>Ca{{I}_{2}}>Ca{{F}_{2}}\] |
| Answer» B. \[Ca{{I}_{2}}>CaB{{r}_{2}}>CaC{{l}_{2}}>Ca{{F}_{2}}\] | |
| 10216. |
The reducing power of a metal depends on various factors. Suggest the factor which makes \[Li\] metal the strongest reducing agent in aqueous solution: |
| A. | Sublimation enthalpy |
| B. | Ionisation enthalpy |
| C. | Hydration enthalpy |
| D. | Electron-gain enthalpy |
| Answer» D. Electron-gain enthalpy | |
| 10217. |
Sodium is heated n excess of air, free from \[C{{O}_{2}}\]at \[350{}^\circ \]C to from X. X. absorbs \[C{{O}_{2}}\] and forms \[N{{a}_{2}}C{{O}_{3}}\]and Y. 'X' and 'Y' are respectively: |
| A. | \[N{{a}_{2}}{{O}_{{}}}\]and \[{{O}_{2}}\] |
| B. | \[N{{a}_{2}}{{O}_{2}}\]and \[{{O}_{2}}\] |
| C. | \[Na\]\[{{O}_{2}}\] and \[{{O}_{2}}\] |
| D. | \[N{{a}_{2}}{{O}_{2}}\] and \[{{O}_{3}}\] |
| Answer» C. \[Na\]\[{{O}_{2}}\] and \[{{O}_{2}}\] | |
| 10218. |
The decreasing order of the second ionization potentials of K, Ca and Ba is |
| A. | K>Ca>Ba |
| B. | Ca>Ba>K |
| C. | Ba>K>Ca |
| D. | K>Ba>Ca |
| Answer» B. Ca>Ba>K | |
| 10219. |
Which of the following is a false statement [CPMT 2004] |
| A. | Fluorine is more electronegative than chlorine |
| B. | Nitrogen has greater \[\text{I}{{\text{E}}_{1}}\]than oxygen |
| C. | Lithium is amphoteric |
| D. | Chlorine is an oxidising agent |
| Answer» D. Chlorine is an oxidising agent | |
| 10220. |
Alkaline earth metals are denser than alkali metals, because metallic bonding in alkaline earth's metal, is [BHU 2004] |
| A. | Stronger |
| B. | Weaker |
| C. | Volatile |
| D. | Not present |
| Answer» B. Weaker | |
| 10221. |
The ratio of \[\frac{{{C}_{p}}}{{{C}_{v}}}\] for inert gases is [DCE 1999] |
| A. | 1.99 |
| B. | 2.13 |
| C. | 1.66 |
| D. | 1.33 |
| Answer» D. 1.33 | |
| 10222. |
Out of (i) \[Xe{{O}_{3}}\] (ii) \[XeO{{F}_{4}}\] and (iii) \[Xe{{F}_{6}}\], the molecules having same number of lone pairs on Xe are |
| A. | (i) and (ii) only |
| B. | (i) and (iii) only |
| C. | (ii) and (iii) only |
| D. | (i), (ii) and (iii) |
| Answer» E. | |
| 10223. |
Which one of the following is correct pair with respect to molecular formula of xenon compound and hybridization state of xenon in it? |
| A. | \[Xe{{F}_{4}},s{{p}^{3}}\] |
| B. | \[Xe{{F}_{2}},sp\] |
| C. | \[Xe{{F}_{2}},s{{p}^{3}}d\] |
| D. | \[Xe{{F}_{4}},s{{p}^{2}}\] |
| Answer» D. \[Xe{{F}_{4}},s{{p}^{2}}\] | |
| 10224. |
Incorrect statement regarding following reactions is: |
| A. | 'X' is explosive |
| B. | 'Y' is an oxyacid of xenon |
| C. | Both are example of non-redox reaction |
| D. | \[Xe{{F}_{6}}\] can undergo partial hydrolysis. |
| Answer» C. Both are example of non-redox reaction | |
| 10225. |
Which of the following xenon-oxo compounds may not be obtained by hydrolysis of xenon fluorides? |
| A. | \[Xe{{O}_{2}}{{F}_{2}}\] |
| B. | \[XeO{{F}_{4}}\] |
| C. | \[Xe{{O}_{3}}\] |
| D. | \[Xe{{O}_{4}}\] |
| Answer» E. | |
| 10226. |
Chlorine cannot displace |
| A. | fluorine from NaF |
| B. | iodine from Nal |
| C. | bromine from NaBr |
| D. | None of these |
| Answer» B. iodine from Nal | |
| 10227. |
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? |
| A. | \[N{{a}_{2}}{{S}_{2}}{{O}_{3}}\] is oxidized |
| 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 | |
| 10228. |
Which of the following form of the sulphur shows paramagnetic behaviour? |
| A. | \[{{S}_{8}}\] |
| B. | \[{{S}_{6}}\] |
| C. | \[{{S}_{2}}\] |
| D. | All of these |
| Answer» D. All of these | |
| 10229. |
The shape of the molecule \[S{{F}_{3}}C{{l}_{3}}\] is |
| A. | trigonal bipyramidal |
| B. | cubic |
| C. | octahedral |
| D. | tetrahedral |
| Answer» D. tetrahedral | |
| 10230. |
\[N{{H}_{4}}Cl{{O}_{4}}+HN{{O}_{3}}\left( dil. \right)\xrightarrow{{}}HCl{{O}_{4}}+\left[ X \right]\] \[[X]\xrightarrow{\Delta }Y(g)\] [X] and [Y] are respectively- |
| A. | \[N{{H}_{4}}N{{O}_{3}}\And {{N}_{2}}O\] |
| B. | \[N{{H}_{4}}N{{O}_{2}}\And {{N}_{2}}\] |
| C. | \[HN{{O}_{4}}\And {{O}_{2}}\] |
| D. | None of these |
| Answer» B. \[N{{H}_{4}}N{{O}_{2}}\And {{N}_{2}}\] | |
| 10231. |
Concentrated \[{{H}_{2}}S{{O}_{4}}\] is not used to prepare \[HBr\] from KBr because it |
| A. | oxidizes \[HBr\]. |
| B. | reduces \[HBr\]. |
| C. | causes disproportionation of \[HBr\]. |
| D. | reacts too slowly with KBr. |
| Answer» B. reduces \[HBr\]. | |
| 10232. |
A white precipitate is obtained on hydrolysis of |
| A. | \[PC{{l}_{5}}\] |
| B. | \[NC{{l}_{3}}\] |
| C. | \[BiC{{l}_{3}}\] |
| D. | \[AsC{{l}_{3}}\] |
| Answer» D. \[AsC{{l}_{3}}\] | |
| 10233. |
Which of the following compound has a P-P bond? |
| A. | \[{{H}_{4}}{{P}_{2}}{{O}_{5}}\] |
| B. | \[{{(HP{{O}_{3}})}_{3}}\] |
| C. | \[{{H}_{4}}{{P}_{2}}{{O}_{6}}\] |
| D. | \[{{H}_{4}}{{P}_{2}}{{O}_{7}}\] |
| Answer» D. \[{{H}_{4}}{{P}_{2}}{{O}_{7}}\] | |
| 10234. |
A metal X on heating in nitrogen gas gives Y. Y on treatment with \[{{H}_{2}}O\] gives a colourless gas which when passed through \[CuS{{O}_{4}}\] solution gives a blue colour. Y is |
| A. | \[Mg{{(N{{O}_{3}})}_{2}}\] |
| B. | \[M{{g}_{3}}{{N}_{2}}\] |
| C. | \[N{{H}_{3}}\] |
| D. | \[MgO\] |
| Answer» C. \[N{{H}_{3}}\] | |
| 10235. |
Which of the following compounds does not exist? |
| A. | \[AsC{{l}_{5}}\] |
| B. | \[SbC{{l}_{3}}\] |
| C. | \[BiC{{l}_{5}}\] |
| D. | \[SbC{{l}_{5}}\] |
| Answer» D. \[SbC{{l}_{5}}\] | |
| 10236. |
Which of the following conceivable structures for \[CC{{l}_{4}}\] will have a zero dipole moment? |
| A. | Square planar |
| B. | Square pyramid (carbon at apex) |
| C. | Irregular tetrahedron |
| D. | None of these |
| Answer» E. | |
| 10237. |
In which of the following, a salt of the type \[KM{{O}_{2}}\] is obtained? |
| A. | \[{{B}_{2}}{{H}_{6}}+KOH\,(aq)\to \] |
| B. | \[Al+KOH\left( aq \right)\to \] |
| C. | Both |
| D. | None of these |
| Answer» D. None of these | |
| 10238. |
Among the following substituted silanes the one which will give rise to cross linked silicone polymer on hydrolysis is |
| A. | \[{{R}_{4}}Si\] |
| B. | \[{{R}_{2}}SiC{{l}_{2}}\] |
| C. | \[RSiC{{l}_{3}}\] |
| D. | \[{{R}_{3}}SiCl\] |
| Answer» B. \[{{R}_{2}}SiC{{l}_{2}}\] | |
| 10239. |
\[Pb{{F}_{4}},PbC{{l}_{4}}\] exist but \[PbB{{r}_{4}}\] and \[Pb{{I}_{4}}\] do not exist because of |
| A. | large size of \[B{{r}^{-}}\] and \[{{I}^{-}}\] |
| B. | strong oxidising character of \[P{{b}^{4+}}\] |
| C. | strong reducing character of \[P{{b}^{4+}}\] |
| D. | low electronegativity of \[B{{r}^{-}}\] and \[{{I}^{-}}\]. |
| Answer» C. strong reducing character of \[P{{b}^{4+}}\] | |
| 10240. |
The correct order of increasing \[C-O\] bond length of \[CO,C{{O}_{2}}\] and \[CO_{3}^{2-}\] is: |
| A. | \[CO_{3}^{2-}~<C{{O}_{2}}<CO\] |
| B. | \[C{{O}_{2}}<CO_{3}^{2-}<CO\] |
| C. | \[CO<CO_{3}^{2-}<C{{O}_{2}}\] |
| D. | \[CO<C{{O}_{2}}<CO_{3}^{2-}\] |
| Answer» E. | |
| 10241. |
The correct statement with respect to CO is |
| A. | it combines with \[{{H}_{2}}O\] to give carbonic acid |
| B. | it reacts with haemoglobin in RBC |
| C. | it is powerful oxidising agent |
| D. | it is used to prepare aerated drinks |
| Answer» C. it is powerful oxidising agent | |
| 10242. |
An aqueous solution of \[FeS{{O}_{4}},A{{l}_{2}}{{(S{{O}_{4}})}_{3}}\] and chrome alum is heated with excess of \[N{{a}_{2}}{{O}_{2}}\] and filtered. The materials obtained are: |
| A. | a colourless filtrate and a green residue |
| B. | a yellow filtrate and a green residue |
| C. | a yellow filtrate and a brown residue |
| D. | a green filtrate and a brown residue |
| Answer» D. a green filtrate and a brown residue | |
| 10243. |
Which of the following group shows the highest boiling point [MP PET 2002] |
| A. | \[{{H}_{2}}O\] |
| B. | \[{{H}_{2}}S\] |
| C. | \[{{H}_{2}}Se\] |
| D. | \[{{H}_{2}}Te\] |
| Answer» B. \[{{H}_{2}}S\] | |
| 10244. |
Shape of \[{{O}_{2}}{{F}_{2}}\] is similar to that of [AIIMS 2004] |
| A. | \[{{C}_{2}}{{F}_{2}}\] |
| B. | \[{{H}_{2}}{{O}_{2}}\] |
| C. | \[{{H}_{2}}{{F}_{2}}\] |
| D. | \[{{C}_{2}}{{H}_{2}}\] |
| Answer» C. \[{{H}_{2}}{{F}_{2}}\] | |
| 10245. |
Which is not easily soluble in water [CPMT 1994] |
| A. | \[{{H}_{2}}\] |
| B. | \[{{O}_{2}}\] |
| C. | \[S{{O}_{2}}\] |
| D. | \[C{{O}_{2}}\] |
| Answer» D. \[C{{O}_{2}}\] | |
| 10246. |
Which of the following products is formed on boiling tin with an alkali solution [Roorkee 2000] |
| A. | \[Sn{{(OH)}_{2}}\] |
| B. | \[Sn{{(OH)}_{4}}\] |
| C. | \[SnO_{3}^{2-}\] |
| D. | \[Sn{{O}_{2}}\] |
| Answer» D. \[Sn{{O}_{2}}\] | |
| 10247. |
An example of a neutral oxide is [KCET 2003] |
| A. | \[NO\] |
| B. | \[C{{O}_{2}}\] |
| C. | \[CaO\] |
| D. | \[ZnO\] |
| Answer» B. \[C{{O}_{2}}\] | |
| 10248. |
Hypo is used in photography to [CBSE PMT 1988; Pb. CET 1989] |
| A. | Reduce \[AgBr\] grains to metallic silver |
| B. | Convert the metallic silver to silver salt |
| C. | Remove undecomposed silver bromide as a soluble complex |
| D. | Remove reduced silver |
| Answer» D. Remove reduced silver | |
| 10249. |
The element which liberates oxygen gas from water is [MP PMT 1993] |
| A. | \[P\] |
| B. | \[Na\] |
| C. | \[F\] |
| D. | \[I\] |
| Answer» D. \[I\] | |
| 10250. |
The acid used in lead storage cells is [NCERT 1971; Roorkee 1989] |
| A. | Phosphoric acid |
| B. | Nitric acid |
| C. | Sulphuric acid |
| D. | Hydrochloric acid |
| Answer» D. Hydrochloric acid | |