Question

Of the species, $\mathrm{NO},{\mathrm{NO}}^{+},{\mathrm{NO}}^{2+}$ and ${\mathrm{NO}}^{-},$ the one with minimum bond strength is :

JEE Main 2020 (03 Sep Shift 1)

Options

• A: ${\mathrm{NO}}^{+}$
• B: $\mathrm{NO}$
• C: ${\mathrm{NO}}^{2+}$
• D: ${\mathrm{NO}}^{-}$

Question

Number of electron deficient molecules among the following ${\mathrm{PH}}_3,{\mathrm{B}}_2{\mathrm{H}}_6,{\mathrm{CCl}}_4,{\mathrm{NH}}_3,\mathrm{LiH}$ and ${\mathrm{BCl}}_3$ is

JEE Main 2022 (25 Jun Shift 1)

Options

• A: $0$
• B: $1$
• C: $2$
• D: $3$

Question

Among the following species ${\mathrm{N}}_2,{ \mathrm{N}}_2^{+},{\mathrm{N}}_2^{-},{\mathrm{N}}_2^{2-},{\mathrm{O}}_2,{\mathrm{O}}_2^{+},{\mathrm{O}}_2^{-},{\mathrm{O}}_2^{2-}$ the number of species showing diamagnetism is

JEE Main 2022 (25 Jul Shift 1)

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Question

The bond order and magnetic property of acetylide ion are same as that of

JEE Main 2023 (12 Apr Shift 1)

Options

• A: ${{\mathrm{O}}_2}^{+}$
• B: ${{\mathrm{N}}_2}^{+}$
• C: ${\mathrm{NO}}^{+}$
• D: ${{\mathrm{O}}_2}^{-}$

Question

${\mathrm{ClF}}_5$ at room temperature is a

JEE Main 2023 (13 Apr Shift 1)

Options

• A:

  Colourless liquid with trigonal bipyramidal geometry

• B:

  Colourless gas with square pyramidal geometry

• C:

  Colourless gas with trigonal bipyramidal geometry

• D:

  Colourless liquid with square pyramidal geometry

Question

Match List I with List II

Choose the correct answer from the options given below

JEE Main 2022 (25 Jul Shift 2)

Options

• A: $\mathrm{A}-\mathrm{II},\mathrm{B}-\mathrm{IV},\mathrm{C}-\mathrm{III},\mathrm{D}-\mathrm{I}$
• B: $\mathrm{A}-\mathrm{IV},\mathrm{B}-\mathrm{II},\mathrm{C}-\mathrm{III},\mathrm{D}-\mathrm{I}$
• C: $\mathrm{A}-\mathrm{II},\mathrm{B}-\mathrm{I},\mathrm{C}-\mathrm{IV},\mathrm{D}-\mathrm{III}$
• D: $\mathrm{A}-\mathrm{IV},\mathrm{B}-\mathrm{II},\mathrm{C}-\mathrm{I},\mathrm{D}-\mathrm{III}$

Question

Consider, ${\mathrm{PF}}_5,{\mathrm{BrF}}_5,{\mathrm{PCl}}_3,{\mathrm{SF}}_6,{\left[{\mathrm{ICl}}_4\right]}^{-},{\mathrm{ClF}}_3$ and ${\mathrm{IF}}_5$

Amongst the above molecule(s) ion(s), the number of molecule(s)/ion(s) having ${\mathrm{sp}}^3{\mathrm{d}}^2$ hybridisation is

JEE Main 2022 (29 Jul Shift 2)

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Question

Match List I with List II \(\begin{array}{llll} \text{List - I} & \text{List - II} \\ \text{(A) } \mathrm{ICl} & \text{(I) T - shape} \\ \text{(B) } \mathrm{ICl}_3 & \text{(II) pyramidal} \\ \text{(C) } \mathrm{ClF}_5 & \text{(III) Pentagonal bipyramidal} \\ \text{(D) } \mathrm{IF}_7 & \text{(IV) Linear} \\ \end{array}\) Choose the correct answer from the options given below :

JEE Main 2024 (05 Apr Shift 2)

Options

• A: (A)-(IV), (B)-(I), (C)-(II), (D)-(III)
• B: (A)-(I), (B)-(IV), (C)-(III), (D)-(II)
• C: (A)-(IV), (B)-(III), (C)-(II), (D)-(I)
• D: (A)-(I), (B)-(III), (C)-(II), (D)-(IV)

Question

Consider the species ${\mathrm{CH}}_4, {\mathrm{NH}}_4^{+}$ and ${\mathrm{BH}}_4^{-}$. Choose the correct option with respect to the there species:
 

JEE Main 2022 (29 Jun Shift 2)

Options

• A: They are isoelectronic and only two have tetrahedral structures
   
• B: They are isoelectronic and all have tetrahedral structures
   
• C: Only two are isoelectronic and all have tetrahedral structures
   
• D: Only two are isoelectronic and only two have tetrahedral structures

Question

The increasing order of boiling points of the following compounds is :

JEE Main 2020 (05 Sep Shift 2)

Options

• A: I < III < IV < II
• B: I < IV < II< III
• C: IV < I < II < III
• D: III < I < II < IV

Question

Which one of the following molecules has maximum dipole moment?

JEE Main 2024 (04 Apr Shift 1)

Options

• A: \(\mathrm{NF}_3\)
• B: \(\mathrm{CH}_4\)
• C: \(\mathrm{PF}_5\)
• D: \(\mathrm{NH}_3\)

Question

The number of species below that have two lone pairs of electrons in their central atom is ___ (Round off to the Nearest integer) ${\mathrm{SF}}_4,{\mathrm{BF}}_4^{-},{\mathrm{ClF}}_3,{\mathrm{AsF}}_3,{\mathrm{PCl}}_5,{\mathrm{BrF}}_5,{\mathrm{XeF}}_4,{\mathrm{SF}}_6$

JEE Main 2021 (18 Mar Shift 2)

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Question

Amongst the following the number of oxide(s) which are paramagnetic in nature is

${\mathrm{Na}}_2\mathrm{O},{\mathrm{KO}}_2,{\mathrm{NO}}_2,{ \mathrm{N}}_2\mathrm{O},{\mathrm{ClO}}_2,\mathrm{NO},{\mathrm{SO}}_2,{\mathrm{Cl}}_2\mathrm{O}$

JEE Main 2022 (27 Jul Shift 1)

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Question

Among the following compounds, the one which shows highest dipole moment is

JEE Main 2023 (13 Apr Shift 1)

Options

• A:

  

• B:

  

• C:

  

• D:

  

Question

If the magnetic moment of a di-oxygen species is $\mathrm{1.73 }\mathrm{B}.\mathrm{M}.$, it may be

JEE Main 2020 (09 Jan Shift 1)

Options

• A: ${\mathrm{O}}_2^{-}$ or ${\mathrm{O}}_2^{+}$.
• B: ${\mathrm{O}}_2$ or ${\mathrm{O}}_2^{+}$.
• C: ${\mathrm{O}}_2$ or ${\mathrm{O}}_2^{-}$.
• D: ${\mathrm{O}}_2,\mathrm{}{\mathrm{O}}_2^{-}$ or ${\mathrm{O}}_2^{+}$.

Question

Match List-I with List-II

JEE Main 2022 (27 Jul Shift 2)

Options

• A: $\mathrm{A}-\mathrm{II},\mathrm{B}-\mathrm{I},\mathrm{C}-\mathrm{IV},\mathrm{D}-\mathrm{III}$
• B: $\mathrm{A}-\mathrm{III},\mathrm{B}-\mathrm{IV},\mathrm{C}-\mathrm{I},\mathrm{D}-\mathrm{II}$
• C: $\mathrm{A}-\mathrm{III},\mathrm{B}-\mathrm{I},\mathrm{C}-\mathrm{IV},\mathrm{D}-\mathrm{II}$
• D: $\mathrm{A}-\mathrm{III},\mathrm{B}-\mathrm{IV},\mathrm{C}-\mathrm{II},\mathrm{D}-\mathrm{I}$

Question

The correct statement among the following is:

JEE Main 2019 (12 Apr Shift 1)

Options

• A: ${\left(\mathrm{S}\mathrm{i}{\mathrm{H}}_3\right)}_3\mathrm{N}$ is planar and less basic than ${\left({\mathrm{C}\mathrm{H}}_3\right)}_3\mathrm{N}$
• B: ${\left(\mathrm{S}\mathrm{i}{\mathrm{H}}_3\right)}_3\mathrm{N}$ is pyramidal and more basic than ${\left({\mathrm{C}\mathrm{H}}_3\right)}_3\mathrm{N}$
• C: ${\left(\mathrm{S}\mathrm{i}{\mathrm{H}}_3\right)}_3\mathrm{N}$ is pyramidal and less basic than ${\left({\mathrm{C}\mathrm{H}}_3\right)}_3\mathrm{N}$
• D: ${\left(\mathrm{S}\mathrm{i}{\mathrm{H}}_3\right)}_3\mathrm{N}$ is planar and more basic than ${\left({\mathrm{C}\mathrm{H}}_3\right)}_3\mathrm{N}$

Question

The correct set from the following in which both pairs are in correct order of melting point is:

JEE Main 2021 (24 Feb Shift 2)

Options

• A: $\mathrm{LiF}>\mathrm{LiCl};\mathrm{NaCl}>\mathrm{MgO}$
• B: $\mathrm{LiCl}>\mathrm{LiF};\mathrm{MgO}>\mathrm{NaCl}$
• C: $\mathrm{LiCl}>\mathrm{LiF};\mathrm{NaCl}>\mathrm{MgO}$
• D: $\mathrm{LiF}>\mathrm{LiCl};\mathrm{MgO}>\mathrm{NaCl}$

Question

Match Lis-I with List-II.

Choose the correct answer from the options given below

JEE Main 2023 (13 Apr Shift 2)

Options

• A: A-IV, B-II, C-III, D-I
• B: A-IV, B-I, C-III, D-II
• C: A-II, B-IV, C-I, D-III
• D: A-III, B-I, C-IV, D-II

Question

Which of the following are isostructural pairs?

A. ${\mathrm{SO}}_4^{2-}$ and ${{\mathrm{CrO}}_4}^{2-}$

B. ${\mathrm{SiCl}}_4$ and ${\mathrm{TiCl}}_4$

C. ${\mathrm{NH}}_3$ and ${\mathrm{NO}}_3^{-}$

D. ${\mathrm{BCl}}_3$ and ${\mathrm{BrCl}}_3$

JEE Main 2021 (24 Feb Shift 1)

Options

• A: $\mathrm{A}$ and $\mathrm{C}$ only
• B: $\mathrm{B}$ and $\mathrm{C}$ only
• C: $\mathrm{A}$ and $\mathrm{B}$ only
• D: $\mathrm{C}$ and $\mathrm{D}$ only

Question

The potential energy curve for the ${\mathrm{H}}_2$ molecule as a function of internuclear distance is:

JEE Main 2020 (05 Sep Shift 1)

Options

• A:
• B:
• C:
• D:

Question

Match List - I with List - II.

Choose the correct answer from the options given below

JEE Main 2022 (26 Jul Shift 1)

Options

• A: $\left(\mathrm{A}\right)-\left(\mathrm{I}\right),\left(\mathrm{B}\right)-\left(\mathrm{II}\right),\left(\mathrm{C}\right)-\left(\mathrm{III}\right),\left(\mathrm{D}\right)-\left(\mathrm{IV}\right)$
• B: $\left(\mathrm{A}\right)-\left(\mathrm{IV}\right),\left(\mathrm{B}\right)-\left(\mathrm{III}\right),\left(\mathrm{C}\right)-\left(\mathrm{II}\right),\left(\mathrm{D}\right)-\left(\mathrm{I}\right)$
• C: $\left(\mathrm{A}\right)-\left(\mathrm{II}\right),\left(\mathrm{B}\right)-\left(\mathrm{IV}\right),\left(\mathrm{C}\right)-\left(\mathrm{I}\right),\left(\mathrm{D}\right)-\left(\mathrm{III}\right)$
• D: $\left(\mathrm{A}\right)-\left(\mathrm{III}\right),\left(\mathrm{B}\right)-\left(\mathrm{IV}\right),\left(\mathrm{C}\right)-\left(\mathrm{II}\right),\left(\mathrm{D}\right)-\left(\mathrm{I}\right)$

Question

The correct statement/s about Hydrogen bonding is/are A. Hydrogen bonding exists when \(\mathrm{H}\) is covalently bonded to the highly electro negative atom. B. Intermolecular \(\mathrm{H}\) bonding is present in o-nitro phenol C. Intramolecular \(\mathrm{H}\) bonding is present in HF. D. The magnitude of \(\mathrm{H}\) bonding depends on the physical state of the compound. E. H-bonding has powerful effect on the structure and properties of compounds Choose the correct answer from the options given below:

JEE Main 2024 (04 Apr Shift 2)

Options

• A: A, B, D only
• B: A, D, E only
• C: A only
• D: A, B, C only

Question

Number of molecules/ions from the following in which the central atom is involved in \(\mathrm{sp}^3\) hybridization is \(\qquad\) \(\mathrm{NO}_3^{-}, \mathrm{BCl}_3, \mathrm{ClO}_2^{-}, \mathrm{ClO}_3\)

JEE Main 2024 (04 Apr Shift 1)

Options

• A: 4
• B: 3
• C: 2
• D: 1

Question

The number of species from the following that have pyramidal geometry around the central atom is _______. \(\mathrm{S}_2 \mathrm{O}_3^{2-}, \mathrm{SO}_4^{2-}, \mathrm{SO}_3^{2-}, \mathrm{S}_2 \mathrm{O}_7^{2-}\)

JEE Main 2024 (04 Apr Shift 2)

Options

• A: 4
• B: 3
• C: 2
• D: 1