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

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

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

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

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

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 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)

Enter your answer

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 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

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

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

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

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

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)

Enter your answer

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

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

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

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

${\mathrm{ClF}}_5$ 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 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 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

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 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

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

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)