JEE Mains · Chemistry · STD 11 -p-Block elements - I
The Lewis acid character of boron tri halides follows the order:
- A \(BBr _3 > BI _3 > BCI _3 > BF _3\)
- B \(BCl _3 > BF _3 > BBr _3 > BI _3\)
- C \(BF _3 > BCl _3 > BBr _3 > BI _3\)
- D \(BI _3 > BBr _3 > BCl _3 > BF _3\)
Answer & Solution
Correct Answer
(D) \(BI _3 > BBr _3 > BCl _3 > BF _3\)
Step-by-step Solution
Detailed explanation
Extent of back bonding, reduces down the group leading to more Lewis acidic strength \(BF _3 > BCl _3 > BBr _3 > BI _3\) (extent of back bonding) \((2 p-2 p)(2 p-3 p)(2 p-4 p)(2 p-5 p)\) \(BF _3 < BCl _3 < BBr _3 < BI _3\) (lewis acidic nature)
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Chemistry
- Sum of \(\pi\)-bonds present in peroxodisulphuric acid and pyrosulphuric acid isJEE Mains 2023 Medium
- The following reaction is performed at \(298 \,K.\) \(2NO(g) + O_2(g) \rightleftharpoons 2NO_2(g)\) The standard free energy of formation of \(NO(g)\) is \(86.6\, kJ/mol\) at \(298 \,K.\) What is the standard free energy of formation of \(NO_2(g)\) at \(298\, K\) ? (\(K_p = 1.6 \times 10^{12})\)JEE Mains 2015 Hard
- Identify the reagent(s) \('A'\) and condition(s) for the reaction :
JEE Mains 2021 Easy - Complete the following reaction sequence and give the name of major product 'P'.
\(CH_3-CH_2-C\equiv N \xrightarrow[\text{(ii) } H_3O^+]{\text{(i) } OH^-/H_2O/\Delta} \xrightarrow[\text{(iv) } H_2O]{\text{(iii) } Cl_2/\text{Red P}} P \text{ (Major product)}\)JEE Mains 2026 Medium - The energy of an electron in the first Bohr orbit of hydrogen atom is \(-2.18 \times 10^{-18}\,J\). Its energy in the third Bohr orbit is \(........\).JEE Mains 2023 Medium
- \(500\) mL of \(0.2\) M MnO\(_4^-\) solution in basic medium when mixed with \(500\) mL of \(1.5\) M KI solution, oxidises iodide ions to liberate molecular iodine. This liberated iodine is then titrated with a standard \(x\) M thiosulphate solution in presence of starch till the end point. If \(300\) mL of thiosulphate was consumed, then the value of \(x\) is __________.JEE Mains 2026 Hard
More PYQs from JEE Mains
- A salt with few drops of conc. HCl gives apple green colour in flame test. The group precipitate of the salt is dissolved in acetic acid and treated with \(K_2CrO_4\) to give yellow precipitate. When the sodium carbonate extract of the salt solution is heated with conc. \(HNO_3\) and ammonium molybdate, it resulted a canary yellow precipitate. The cation and anion present in the salt are respectively,JEE Mains 2026 Medium
- Four point charges \(-q, +q, +q\) and \(-q\) are placed on \(y\) axis at \(y = -2d\), \(y = -d, y = +d\) and \(y = +2d\), respectively. The magnitude of the electric field \(E\) at a point on the \(x -\) axis at \(x = D\), with \(D > > d\), will vary asJEE Mains 2019 Hard
- In the Young's double slit experiment the intensity produced by each one of the individual slits is \(I_0\). The distance between two slits is 2 mm . The distance of screen from slits is 10 m . The wavelength of light is \(6000\) Å. The intensity of light on the screen in front of one of the slits is _________ .JEE Mains 2026 Medium
- The displacement current of \(4.425 \,\mu A\) is developed in the space between the plates of parallel plate capacitor when voltage is changing at a rate of \(10^{6} \,Vs ^{-1}\). The area of each plate of the capacitor is \(40 \,cm ^{2}\). The distance between each plate of the capacitor is \(x \times 10^{-3} \,m\). The value of \(x\) is ................ (Permittivity of free space, \(\varepsilon _{0}=8.85 \times 10^{-12} \,C ^{2} N ^{-1} m ^{-2}\) )JEE Mains 2022 Medium
- The value of \(\cot \left( {\sum\limits_{n = 1}^{19} {{{\cot }^{ - 1}}\left( {1 + \sum\limits_{p = 1}^n {2p} } \right)} } \right)\) isJEE Mains 2019 Hard
- The molar solubility of \(\mathrm{Zn}(\mathrm{OH})_{2}\) in \(0.1 \,\mathrm{M} \,\mathrm{NaOH}\) solution is \(\mathrm{x} \times 10^{-18} \,\mathrm{M}\). The value of \(\mathrm{x}\) is ...... . (Nearest integer) (Given : The solubility product of \(\mathrm{Zn}(\mathrm{OH})_{2}\) is \(\left.2 \times 10^{-20}\right)\)JEE Mains 2021 Hard