For the reaction system \[2NO(g)+{{O}_{2}}(g)\to 2N{{O}_{2}}(g)\] volume is suddenly produced to half its value by increasing the pressure on it. If the reaction is of first order with respect to \[{{O}_{2}}\] and second order with respect to \[NO\], the rate of reaction will [AIEEE 2003]

Increase to four times of its initial value

Diminish to one fourth of its initial value

Diminish to one eighth of its initial value

Increase to eight times of its initial value

Increase to four times of its initial value

From the following which is a second order reaction [AMU 2002]

\[K=3.98\times {{10}^{-5}}\text{lit}\,\,\text{mol}{{\text{e}}^{\text{-2}}}\,\,{{\sec }^{-1}}\]

\[K=5.47\times {{10}^{-4}}{{\sec }^{-1}}\]

\[K=3.9\times {{10}^{-3}}\text{mole}\,\,\text{lit}\,\,{{\sec }^{-1}}\]

\[K=3.94\times {{10}^{-4}}\text{lit}\,\,\text{mol}{{\text{e}}^{\text{-1}}}\,\,{{\sec }^{-1}}\]

\[K=3.98\times {{10}^{-5}}\text{lit}\,\,\text{mol}{{\text{e}}^{\text{-2}}}\,\,{{\sec }^{-1}}\]

The rate for a first order reaction is \[0.6932\times {{10}^{-2}}mol\,{{l}^{-1}}mi{{n}^{-1}}\] and the initial concentration of the reactants is 1M, \[{{T}_{1/2}}\] is equal to [JIPMER (Med.) 2001]

\[0.6932\times {{10}^{-3}}\] min

\[0.6932\times {{10}^{-2}}\] min

For a first order reaction, the half-life period is independent of [CBSE PMT 1999]

Cube root of initial concentration

First power of final concentration

Square root of final concentration

A chemical reaction is said to take place through the various stages with \[\Delta G{}^\circ \] values indicated by the graph: Progress Stages I and II represent respectively

activated complex activated complex

I II reaction intermediate activated complex

activated complex activated complex

reaction intermediate reaction intermediate

activated complex reaction intermediate

In the formation of sulphur trioxide by the contact process, \[2S{{O}_{2}}+{{O}_{2}}\rightleftharpoons 2S{{O}_{3}}\], the rate of reaction was measured as \[\frac{d[{{O}_{2}}]}{dt}=3.0\times {{10}^{-4}}mol\,{{L}^{-1}}{{s}^{-1}}\]. The rate of reaction expressed in terms of \[S{{O}_{3}}\] will be

\[1.5\times {{10}^{-4}}mol\,{{L}^{-1}}{{s}^{-1}}\]

\[3.0\times {{10}^{-4}}mol\,{{L}^{-1}}{{s}^{-1}}\]

\[6.0\times {{10}^{-4}}mol\,{{L}^{-1}}{{s}^{-1}}\]

\[1.5\times {{10}^{-4}}mol\,{{L}^{-1}}{{s}^{-1}}\]

\[4.5\times {{10}^{-4}}mol\,{{L}^{-1}}{{s}^{-1}}\]

The molecule of \[C{{O}_{2}}\] has 180° bond angle. It can be explanid on the basis of [AFMC 2004]

\[{{d}^{2}}s{{p}^{3}}\] hybridization

The correct order towards bond angle is [RPMT 1997]

Bond angle does not depend on hybridization

In the formation of \[NaCl\] from \[Na\] and \[\gamma -\] [CPMT 1985]

Sodium accepts electron and chlorine loses electron

Sodium and chlorine both give electrons

Sodium and chlorine both accept electrons

Sodium loses electron and chlorine accepts electron

Sodium accepts electron and chlorine loses electron

The molecular shapes of \[S{{F}_{4}},\,C{{F}_{4}}\] and \[Xe{{F}_{4}}\] are [AIEEE 2005]

The same with 2, 0 and 1 lone pairs of electrons on the central atom, respectively

The same with 1, 1 and 1 lone pair of electrons on the central atoms, respectively

Different with 0, 1 and 2 lone pairs of electrons on the central atom, respectively

Different with 1, 0 and 2 lone pairs of electrons on the central atom, respectively

A lone pair of electrons in an atom implies [KCET 2002]

A pair of electrons involved in bonding

A pair of valence electrons not involved in bonding

A pair of electrons involved in bonding

Among \[K{{O}_{2}},\,AlO_{2}^{-},\,Ba{{O}_{2}}\] and \[NO_{2}^{+}\] unpaired electron is present in [MP PET 2003]

\[NO_{2}^{+}\] and \[Ba{{O}_{2}}\]

\[K{{O}_{2}}\]and\[AlO_{2}^{-}\]

\[{{H}_{2}}O\]is dipolar, whereas \[Be{{F}_{2}}\]is not. It is because [CBSE PMT 1989; 2004]

The electornegativity of F is greater than that of O

\[{{H}_{2}}O\]is linear and \[Be{{F}_{2}}\] is angular

\[{{H}_{2}}O\]is angular and \[Be{{F}_{2}}\] is linear

The electornegativity of F is greater than that of O

\[{{H}_{2}}O\]involves hydrogen bonding whereas \[Be{{F}_{2}}\]is a discrete molecule

The maximum number of 90° angles between bond pair-bond pair of electrons is observed in [AIEEE 2004]

\[s{{p}^{3}}{{d}^{2}}\]hybridization

In the formation of a molecule by an atom [AFMC 1995]

Both attractive and repulsive forces operate

Among \[K{{O}_{2}},AlO_{2}^{-},Ba{{O}_{2}}\] and \[NO_{2}^{+}\] unpaired electron is present in

\[NO_{2}^{+}\] and \[Ba{{O}_{2}}\]

\[K{{O}_{2}}\]and \[AlO_{2}^{-}\]

Which one of the following arrangements of molecules is correct on the basis of their dipole moments?

\[B{{F}_{3}}>N{{H}_{3}}>N{{F}_{3}}\]

\[B{{F}_{3}}>N{{F}_{3}}>N{{H}_{3}}\]

\[N{{H}_{3}}>B{{F}_{3}}>N{{F}_{3}}\]

\[N{{H}_{3}}>N{{F}_{3}}>B{{F}_{3}}\]

Among the following species identify the isostructural pairs: \[N{{F}_{3}},NO_{3}^{-},B{{F}_{3}}{{H}_{3}}{{O}^{+}},H{{N}_{3}}\]

\[[N{{F}_{3}},{{H}_{3}}{{O}^{+}}]\] and \[[H{{N}_{3}},B{{F}_{3}}]\]

\[[N{{F}_{3}},NO_{3}^{-}\,]\] and\[[B{{F}_{3}},\,\,{{H}_{3}}{{O}^{+}}]\]

\[[N{{F}_{3}},H{{N}_{3}}]\] and \[[N{{O}_{3}}^{-},B{{F}_{3}}]\]

\[[N{{F}_{3}},{{H}_{3}}{{O}^{+}}]\] and \[[N{{O}_{3}}^{-},B{{F}_{3}}]\]

\[[N{{F}_{3}},{{H}_{3}}{{O}^{+}}]\] and \[[H{{N}_{3}},B{{F}_{3}}]\]

The hybridization of atomic orbital's of nitrogen in \[NO_{2}^{+},NO_{2}^{-}\] and \[NH_{4}^{+}\]are

\[s{{p}^{2}},\text{ }sp\] and \[s{{p}^{3}}\] respectively

\[s{{p}^{2}},\text{ }s{{p}^{3}}\] and \[s{{p}^{2}}\] respectively

\[sp,\text{ }s{{p}^{2}}\] and \[s{{p}^{3}}\] respectively

\[s{{p}^{2}},\text{ }sp\] and \[s{{p}^{3}}\] respectively

\[s{{p}^{2}},\text{ }s{{p}^{3}}\] and sp respectively

What is not true about ice?

It has open cage like structure

Each O atom is surrounded by 4 H atoms

Each O atom has four H-bonds around it

In which of the following sets, each member has linear shape:

\[BeC{{l}_{2}},\text{ }Xe{{F}_{2}},\text{ }ClO_{2}^{-}\]

\[N_{3}^{-},\text{ }I_{3}^{+},\text{ }Xe{{F}_{2}}\]

\[NO_{2}^{+},\text{ }O_{3}^{{}},\text{ }{{C}_{2}}{{H}_{2}}\]

\[N_{3}^{-},\text{ }I_{3}^{-},\text{ }NO_{2}^{+}\]

\[BeC{{l}_{2}},\text{ }Xe{{F}_{2}},\text{ }ClO_{2}^{-}\]

Correct order of bond energy is

\[N_{2}^{-}>N_{2}^{{}}=N_{2}^{+}>N_{2}^{2-}\]

\[{{N}_{2}}>N_{2}^{+}>N_{2}^{-}>N_{2}^{2-}\]

\[N_{2}^{+}>N_{2}^{-}>N_{2}^{2-}>{{N}_{2}}\]

\[{{N}_{2}}>N_{2}^{+}=N_{2}^{-}>N_{2}^{2-}\]

\[N_{2}^{-}>N_{2}^{{}}=N_{2}^{+}>N_{2}^{2-}\]

Which of following statement is true?

Allene is polar due to its non-planar structure

Absolutely pure water does not contain any ions

London forces is directly proportional to more number of loosely held electron

Allene is polar due to its non-planar structure

\[C{{H}_{3}}OC{{H}_{3}}\] is less volatile than \[{{C}_{2}}{{H}_{5}}OH\] due to higher molecular weight.

11242 + Mcqs in Chemistry in Joint Entrance Exam - Main (JEE Main) Page 221 McqOptions

11001.	For the reaction system \[2NO(g)+{{O}_{2}}(g)\to 2N{{O}_{2}}(g)\] volume is suddenly produced to half its value by increasing the pressure on it. If the reaction is of first order with respect to \[{{O}_{2}}\] and second order with respect to \[NO\], the rate of reaction will [AIEEE 2003]
A.	Diminish to one fourth of its initial value
B.	Diminish to one eighth of its initial value
C.	Increase to eight times of its initial value
D.	Increase to four times of its initial value
Answer» D. Increase to four times of its initial value

Discussion

11002.	For an elementary reaction, 2A + B\[\to \]C + D the molecularity is [Kurukshetra CEE 2002]
A.	Zero
B.	One
C.	Two
D.	Three
Answer» E.

Discussion

11003.	From the following which is a second order reaction [AMU 2002]
A.	\[K=5.47\times {{10}^{-4}}{{\sec }^{-1}}\]
B.	\[K=3.9\times {{10}^{-3}}\text{mole}\,\,\text{lit}\,\,{{\sec }^{-1}}\]
C.	\[K=3.94\times {{10}^{-4}}\text{lit}\,\,\text{mol}{{\text{e}}^{\text{-1}}}\,\,{{\sec }^{-1}}\]
D.	\[K=3.98\times {{10}^{-5}}\text{lit}\,\,\text{mol}{{\text{e}}^{\text{-2}}}\,\,{{\sec }^{-1}}\]
Answer» D. \[K=3.98\times {{10}^{-5}}\text{lit}\,\,\text{mol}{{\text{e}}^{\text{-2}}}\,\,{{\sec }^{-1}}\]

Discussion

11004.	The rate for a first order reaction is \[0.6932\times {{10}^{-2}}mol\,{{l}^{-1}}mi{{n}^{-1}}\] and the initial concentration of the reactants is 1M, \[{{T}_{1/2}}\] is equal to [JIPMER (Med.) 2001]
A.	\[6.932\] min
B.	100 min
C.	\[0.6932\times {{10}^{-3}}\] min
D.	\[0.6932\times {{10}^{-2}}\] min
Answer» C. \[0.6932\times {{10}^{-3}}\] min

Discussion

11005.	After how many seconds will the concentration of the reactants in a first order reaction be halved, if the decay constant is \[\text{1}\text{.155}\times \text{1}{{\text{0}}^{\text{-3}}}{{\sec }^{-1}}\] [CBSE PMT 2000]
A.	100 sec
B.	200 sec
C.	400 sec
D.	600 sec
Answer» E.

Discussion

11006.	For a first order reaction \[A\to \]product, the rate of reaction at \[[A]=0.2\,\,mol\,\,{{l}^{-1}}\] is \[1.0\times {{10}^{-2}}mol\,\,{{l}^{-1}}\,{{\min }^{-1}}\]. The half life period for the reaction is [Roorkee 1999]
A.	832 s
B.	440 s
C.	416 s
D.	13.86 s
Answer» E.

Discussion

11007.	For a first order reaction, rate constant is \[0.6932\,h{{r}^{-1}}\], then half-life for the reaction is [Bihar MEE 1997]
A.	\[0.01\,hr\]
B.	\[1\,hr\]
C.	\[2\,hr\]
D.	\[10\,hr\]
Answer» C. \[2\,hr\]

Discussion

11008.	For a first order reaction, the half-life period is independent of [CBSE PMT 1999]
A.	Initial concentration
B.	Cube root of initial concentration
C.	First power of final concentration
D.	Square root of final concentration
Answer» B. Cube root of initial concentration

Discussion

11009.	For the first order reaction with rate constant \[k\], which expression gives the half-life period ? (Initial concentration \[=a\]) [MP PET/PMT 1998]
A.	\[\frac{{{1}^{2}}}{k}\]
B.	\[\frac{1}{ka}\]
C.	\[\frac{0.693}{k}\]
D.	\[\frac{3}{2k{{a}^{2}}}\]
Answer» D. \[\frac{3}{2k{{a}^{2}}}\]

Discussion

11010.	A chemical reaction is said to take place through the various stages with \[\Delta G{}^\circ \] values indicated by the graph: Progress Stages I and II represent respectively
A.	I II reaction intermediate activated complex
B.	activated complex activated complex
C.	reaction intermediate reaction intermediate
D.	activated complex reaction intermediate
Answer» B. activated complex activated complex

Discussion

11011.	For the reaction, \[P\text{ }+\text{ }Q+\text{ }R\to S\] Experimental data for the measured initial rates in given below. Expt. (P) (Q) (R) Initial rate (in \[m{{s}^{-1}}\]) 1. 0.2M 0.5M 0.4M \[8.0\times {{10}^{-5}}\] 2. 0.4M 0.5M 0.4M \[3.2\times {{10}^{-4}}\] 3. 0.4M 2.0M 0.4M \[1.28\times {{10}^{-3}}\] 4. 0.1M 0.2M 1.6M \[4.0\times {{10}^{-8}}\] The order of the reaction with respect of P, Q and R respectively is
A.	4, 1, 3
B.	2, 2, 1
C.	1, 2, 1
D.	2, 1, 1
Answer» E.

Discussion

11012.	In the formation of sulphur trioxide by the contact process, \[2S{{O}_{2}}+{{O}_{2}}\rightleftharpoons 2S{{O}_{3}}\], the rate of reaction was measured as \[\frac{d[{{O}_{2}}]}{dt}=3.0\times {{10}^{-4}}mol\,{{L}^{-1}}{{s}^{-1}}\]. The rate of reaction expressed in terms of \[S{{O}_{3}}\] will be
A.	\[3.0\times {{10}^{-4}}mol\,{{L}^{-1}}{{s}^{-1}}\]
B.	\[6.0\times {{10}^{-4}}mol\,{{L}^{-1}}{{s}^{-1}}\]
C.	\[1.5\times {{10}^{-4}}mol\,{{L}^{-1}}{{s}^{-1}}\]
D.	\[4.5\times {{10}^{-4}}mol\,{{L}^{-1}}{{s}^{-1}}\]
Answer» C. \[1.5\times {{10}^{-4}}mol\,{{L}^{-1}}{{s}^{-1}}\]

Discussion

11013.	The angle between \[s{{p}^{2}}\]orbitals in ethylene is [BHU 1987, 95; AMU 1985]
A.	\[{{90}^{o}}\]
B.	\[{{120}^{o}}\]
C.	\[{{180}^{o}}\]
D.	\[{{109.5}^{o}}\]
Answer» C. \[{{180}^{o}}\]

Discussion

11014.	The nature of hybridization in \[C{{H}_{2}}Cl-C{{H}_{2}}Cl\] for carbon is
A.	\[sp\]
B.	\[s{{p}^{2}}\]
C.	\[s{{p}^{3}}\]
D.	\[s{{p}^{2}}d\]
Answer» D. \[s{{p}^{2}}d\]

Discussion

11015.	Arrange the hydra-acids of halogens in increasing order of acidity [Orissa JEE 2003]
A.	\[HF<HCl<HBr<HI\]
B.	\[HI<HBr<HCl<HF\]
C.	\[HF<HBr<HI<HCl\]
D.	\[HF<HI<HBr<HCl\]
Answer» B. \[HI<HBr<HCl<HF\]

Discussion

11016.	Structure of ammonia is [MP PMT 1987, 89, 91; CPMT 1975, 82; RPMT 1999; JIPMER 2002]
A.	Trigonal
B.	Tetrahedral
C.	Pyramidal
D.	Trigonal pyramidal
Answer» D. Trigonal pyramidal

Discussion

11017.	The number of dative bonds in sulphuric acid molecules is [MP PET 2002]
A.	0
B.	1
C.	2
D.	4
Answer» D. 4

Discussion

11018.	The molecule of \[C{{O}_{2}}\] has 180° bond angle. It can be explanid on the basis of [AFMC 2004]
A.	\[s{{p}^{3}}\] hybridisation
B.	\[s{{p}^{2}}\] hybridisation
C.	\[sp\] hybridisation
D.	\[{{d}^{2}}s{{p}^{3}}\] hybridization
Answer» D. \[{{d}^{2}}s{{p}^{3}}\] hybridization

Discussion

11019.	Solid \[C{{H}_{4}}\] is [DPMT 1983]
A.	Molecular solid
B.	Ionic solid
C.	Pseudo solid
D.	Does not exist
Answer» B. Ionic solid

Discussion

11020.	Which of the following molecule is linear [MP PMT 2000]
A.	\[S{{O}_{2}}\]
B.	\[NO_{2}^{+}\]
C.	\[NO_{2}^{-}\]
D.	\[SC{{l}_{2}}\]
Answer» C. \[NO_{2}^{-}\]

Discussion

11021.	The correct order towards bond angle is [RPMT 1997]
A.	\[sp<s{{p}^{2}}<s{{p}^{3}}\]
B.	\[s{{p}^{2}}<sp<s{{p}^{3}}\]
C.	\[s{{p}^{3}}<s{{p}^{2}}<sp\]
D.	Bond angle does not depend on hybridization
Answer» D. Bond angle does not depend on hybridization

Discussion

11022.	In the following molecule, the two carbon atoms marked by asterisk () possess the following type of hybridized orbitals \[{{H}_{3}}C-{{C}^{}}\equiv {{C}^{*}}-C{{H}_{3}}\] [NCERT 1984]
A.	\[s{{p}^{3}}\]orbital
B.	\[s{{p}^{2}}\]orbital
C.	\[sp\]orbital
D.	\[s\]orbital
Answer» D. \[s\]orbital

Discussion

11023.	In the formation of \[NaCl\] from \[Na\] and \[\gamma -\] [CPMT 1985]
A.	Sodium and chlorine both give electrons
B.	Sodium and chlorine both accept electrons
C.	Sodium loses electron and chlorine accepts electron
D.	Sodium accepts electron and chlorine loses electron
Answer» D. Sodium accepts electron and chlorine loses electron

Discussion

11024.	Of the following species the one having a square planar structure is [NCERT 1981; MP PMT 1994]
A.	\[NH_{4}^{+}\]
B.	\[BF_{4}^{-}\]
C.	\[Xe{{F}_{4}}\]
D.	\[SC{{l}_{4}}\]
Answer» D. \[SC{{l}_{4}}\]

Discussion

11025.	A molecule which contains unpaired electrons is [NCERT 1982]
A.	Carbon monoxide
B.	Molecular nitrogen
C.	Molecular oxygen
D.	Hydrogen peroxide
Answer» D. Hydrogen peroxide

Discussion

11026.	Which of the following molecules does not have a linear arrangement of atoms [CBSE PMT 1989]
A.	\[{{H}_{2}}S\]
B.	\[{{C}_{2}}{{H}_{2}}\]
C.	\[Be{{H}_{2}}\]
D.	\[C{{O}_{2}}\]
Answer» B. \[{{C}_{2}}{{H}_{2}}\]

Discussion

11027.	The molecular shapes of \[S{{F}_{4}},\,C{{F}_{4}}\] and \[Xe{{F}_{4}}\] are [AIEEE 2005]
A.	The same with 2, 0 and 1 lone pairs of electrons on the central atom, respectively
B.	The same with 1, 1 and 1 lone pair of electrons on the central atoms, respectively
C.	Different with 0, 1 and 2 lone pairs of electrons on the central atom, respectively
D.	Different with 1, 0 and 2 lone pairs of electrons on the central atom, respectively
Answer» E.

Discussion

11028.	A lone pair of electrons in an atom implies [KCET 2002]
A.	A pair of valence electrons not involved in bonding
B.	A pair of electrons involved in bonding
C.	A pair of electrons
D.	A pair of valence electrons
Answer» B. A pair of electrons involved in bonding

Discussion

11029.	Among \[K{{O}_{2}},\,AlO_{2}^{-},\,Ba{{O}_{2}}\] and \[NO_{2}^{+}\] unpaired electron is present in [MP PET 2003]
A.	\[NO_{2}^{+}\] and \[Ba{{O}_{2}}\]
B.	\[K{{O}_{2}}\]and\[AlO_{2}^{-}\]
C.	\[K{{O}_{2}}\] only
D.	\[Ba{{O}_{2}}\]only
Answer» D. \[Ba{{O}_{2}}\]only

Discussion

11030.	Central atom of the following compound has one lone pair of electrons and three bond pairs of electrons [JIPMER 2002]
A.	\[{{H}_{2}}S\]
B.	\[AlC{{l}_{3}}\]
C.	\[N{{H}_{3}}\]
D.	\[B{{F}_{3}}\]
Answer» D. \[B{{F}_{3}}\]

Discussion

11031.	\[{{H}_{2}}O\]is dipolar, whereas \[Be{{F}_{2}}\]is not. It is because [CBSE PMT 1989; 2004]
A.	\[{{H}_{2}}O\]is linear and \[Be{{F}_{2}}\] is angular
B.	\[{{H}_{2}}O\]is angular and \[Be{{F}_{2}}\] is linear
C.	The electornegativity of F is greater than that of O
D.	\[{{H}_{2}}O\]involves hydrogen bonding whereas \[Be{{F}_{2}}\]is a discrete molecule
Answer» C. The electornegativity of F is greater than that of O

Discussion

11032.	Maximum bond angle is present in [BVP 2004]
A.	\[BC{{l}_{3}}\]
B.	\[BB{{r}_{3}}\]
C.	\[B{{F}_{3}}\]
D.	Same for all
Answer» E.

Discussion

11033.	Which has the least bond angle [NCERT 1973; DPMT 1990; CBSE PMT 1990; UPSEAT 2003]
A.	\[N{{H}_{3}}\]
B.	\[Be{{F}_{2}}\]
C.	\[{{H}_{2}}O\]
D.	\[C{{H}_{4}}\]
Answer» D. \[C{{H}_{4}}\]

Discussion

11034.	The maximum number of 90° angles between bond pair-bond pair of electrons is observed in [AIEEE 2004]
A.	\[ds{{p}^{2}}\]hybridization
B.	\[s{{p}^{3}}d\]hybridization
C.	\[ds{{p}^{3}}\]hybridization
D.	\[s{{p}^{3}}{{d}^{2}}\]hybridization
Answer» E.

Discussion

11035.	Which of the following has the highest melting point [CPMT 1994]
A.	\[Pb\]
B.	Diamond
C.	\[Fe\]
D.	\[Na\]
Answer» C. \[Fe\]

Discussion

11036.	The number of ionic, covalent and coordinate bonds in \[N{{H}_{4}}Cl\] are respectively [MP PMT 1999]
A.	1, 3 and 1
B.	1, 3 and 2
C.	1, 2 and 3
D.	1, 1 and 3
Answer» B. 1, 3 and 2

Discussion

11037.	Which one is the highest melting halide [AIIMS 1980]
A.	\[NaCl\]
B.	\[NaBr\]
C.	\[NaF\]
D.	\[NaI\]
Answer» D. \[NaI\]

Discussion

11038.	Lattice energy of alkali metal chlorides follows the order [DPMT 2004]
A.	\[LiCl>NaCl>KCl>RbCl>CsCl\]
B.	\[CsCl>NaCl>KCl>RbCl>LiCl\]
C.	\[LiCl>CsCl>NaCl>KCl>RbCl\]
D.	\[NaCl>LiCl>KCl>RbCl>CsCl\]
Answer» B. \[CsCl>NaCl>KCl>RbCl>LiCl\]

Discussion

11039.	In the formation of a molecule by an atom [AFMC 1995]
A.	Attractive forces operate
B.	Repulsive forces operate
C.	Both attractive and repulsive forces operate
D.	None of these
Answer» D. None of these

Discussion

11040.	Among \[K{{O}_{2}},AlO_{2}^{-},Ba{{O}_{2}}\] and \[NO_{2}^{+}\] unpaired electron is present in
A.	\[NO_{2}^{+}\] and \[Ba{{O}_{2}}\]
B.	\[K{{O}_{2}}\]and \[AlO_{2}^{-}\]
C.	\[K{{O}_{2}}\] only
D.	\[Ba{{O}_{2}}\] only
Answer» D. \[Ba{{O}_{2}}\] only

Discussion

11041.	Which one of the following arrangements of molecules is correct on the basis of their dipole moments?
A.	\[B{{F}_{3}}>N{{H}_{3}}>N{{F}_{3}}\]
B.	\[B{{F}_{3}}>N{{F}_{3}}>N{{H}_{3}}\]
C.	\[N{{H}_{3}}>B{{F}_{3}}>N{{F}_{3}}\]
D.	\[N{{H}_{3}}>N{{F}_{3}}>B{{F}_{3}}\]
Answer» E.

Discussion

11042.	Among the following species identify the isostructural pairs: \[N{{F}_{3}},NO_{3}^{-},B{{F}_{3}}{{H}_{3}}{{O}^{+}},H{{N}_{3}}\]
A.	\[[N{{F}_{3}},NO_{3}^{-}\,]\] and\[[B{{F}_{3}},\,\,{{H}_{3}}{{O}^{+}}]\]
B.	\[[N{{F}_{3}},H{{N}_{3}}]\] and \[[N{{O}_{3}}^{-},B{{F}_{3}}]\]
C.	\[[N{{F}_{3}},{{H}_{3}}{{O}^{+}}]\] and \[[N{{O}_{3}}^{-},B{{F}_{3}}]\]
D.	\[[N{{F}_{3}},{{H}_{3}}{{O}^{+}}]\] and \[[H{{N}_{3}},B{{F}_{3}}]\]
Answer» D. \[[N{{F}_{3}},{{H}_{3}}{{O}^{+}}]\] and \[[H{{N}_{3}},B{{F}_{3}}]\]

Discussion

11043.	In \[I{{F}_{3}}\] the bond angle of F - I - F is
A.	equal to \[{{90}^{o}}\]
B.	less than \[{{90}^{o}}\]
C.	greater than \[{{90}^{o}}\]
D.	equal to \[{{90}^{o}}\]
Answer» C. greater than \[{{90}^{o}}\]

Discussion

11044.	Which of the following has been arranged in order of increasing covalent character?
A.	\[KCl<CaC{{l}_{2}}<AlC{{l}_{3}}<SnC{{l}_{4}}\]
B.	\[SnC{{l}_{4}}<AlC{{l}_{3}}<CaC{{l}_{2}}<KCl\]
C.	\[AlC{{l}_{3}}<CaC{{l}_{2}}<KCl<SnC{{l}_{4}}\]
D.	\[CaC{{l}_{2}}<SnC{{l}_{4}}<KCl<AlC{{l}_{3}}\]
Answer» B. \[SnC{{l}_{4}}<AlC{{l}_{3}}<CaC{{l}_{2}}<KCl\]

Discussion

11045.	The hybridization of atomic orbital's of nitrogen in \[NO_{2}^{+},NO_{2}^{-}\] and \[NH_{4}^{+}\]are
A.	\[s{{p}^{2}},\text{ }s{{p}^{3}}\] and \[s{{p}^{2}}\] respectively
B.	\[sp,\text{ }s{{p}^{2}}\] and \[s{{p}^{3}}\] respectively
C.	\[s{{p}^{2}},\text{ }sp\] and \[s{{p}^{3}}\] respectively
D.	\[s{{p}^{2}},\text{ }s{{p}^{3}}\] and sp respectively
Answer» C. \[s{{p}^{2}},\text{ }sp\] and \[s{{p}^{3}}\] respectively

Discussion

11046.	Arrange the following compounds in increasing order of their ionic character: \[SnC{{l}_{2}},SnC{{l}_{4}},SiC{{l}_{4}},Sn{{F}_{4}},Sn{{F}_{2}}\]
A.	\[Sn{{F}_{2}}<SnC{{l}_{2}}<Sn{{F}_{4}}<SnC{{l}_{4}}<SiC{{l}_{4}}\]
B.	\[Sn{{F}_{2}}<SnC{{l}_{2}}<Sn{{F}_{4}}<SiC{{l}_{4}}<SnC{{l}_{4}}\]
C.	\[SiC{{l}_{4}}<SnC{{l}_{4}}<Sn{{F}_{4}}<SnC{{l}_{2}}<Sn{{F}_{2}}\]
D.	\[SnC{{l}_{4}}<Sn{{F}_{4}}<SnC{{l}_{2}}<Sn{{F}_{2}}<SiC{{l}_{4}}\]
Answer» D. \[SnC{{l}_{4}}<Sn{{F}_{4}}<SnC{{l}_{2}}<Sn{{F}_{2}}<SiC{{l}_{4}}\]

Discussion

11047.	What is not true about ice?
A.	It has open cage like structure
B.	It has less density than water
C.	Each O atom is surrounded by 4 H atoms
D.	Each O atom has four H-bonds around it
Answer» E.

Discussion

11048.	In which of the following sets, each member has linear shape:
A.	\[N_{3}^{-},\text{ }I_{3}^{+},\text{ }Xe{{F}_{2}}\]
B.	\[NO_{2}^{+},\text{ }O_{3}^{{}},\text{ }{{C}_{2}}{{H}_{2}}\]
C.	\[N_{3}^{-},\text{ }I_{3}^{-},\text{ }NO_{2}^{+}\]
D.	\[BeC{{l}_{2}},\text{ }Xe{{F}_{2}},\text{ }ClO_{2}^{-}\]
Answer» D. \[BeC{{l}_{2}},\text{ }Xe{{F}_{2}},\text{ }ClO_{2}^{-}\]

Discussion

11049.	Correct order of bond energy is
A.	\[{{N}_{2}}>N_{2}^{+}>N_{2}^{-}>N_{2}^{2-}\]
B.	\[N_{2}^{+}>N_{2}^{-}>N_{2}^{2-}>{{N}_{2}}\]
C.	\[{{N}_{2}}>N_{2}^{+}=N_{2}^{-}>N_{2}^{2-}\]
D.	\[N_{2}^{-}>N_{2}^{{}}=N_{2}^{+}>N_{2}^{2-}\]
Answer» D. \[N_{2}^{-}>N_{2}^{{}}=N_{2}^{+}>N_{2}^{2-}\]

Discussion

11050.	Which of following statement is true?
A.	Absolutely pure water does not contain any ions
B.	London forces is directly proportional to more number of loosely held electron
C.	Allene is polar due to its non-planar structure
D.	\[C{{H}_{3}}OC{{H}_{3}}\] is less volatile than \[{{C}_{2}}{{H}_{5}}OH\] due to higher molecular weight.
Answer» C. Allene is polar due to its non-planar structure

Discussion

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