Download App

The p-Block Elements — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryThe p-Block Elements2 Marks
Question
What happens when.
$\mathrm{BF}_3$ is reacted with ammonia?
✓

Answer

$\mathrm{BF}_3$ (a Lewis acid) reacts with $\mathrm{NH}_3$ (a Lewis base) to form an adduct. This results in a complete octet around B in $\mathrm{BF}_3$.
$\text{F}_3\text{B}+:\text{NH}_3\rightarrow \text{F}_3\text{B}\leftarrow:\text{NH}_3$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "2 Marks Questions" from The p-Block Elements→The p-Block Elements — all question types→Chemistry STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

For a hydrogen like particle, derive the expression,
$\text{v}_\text{n}=\Big(\frac{\text{Ze}^2}{\text{mr}_\text{n}}\Big)^\frac{1}{2}$
Where vn is the velocity of the electron at distance rn from the nucleus, Z is the atomic number of the H-like particle, e and m are the charge and mass of the electron.
→
Calculate the percentage ionic character of bond in CsF. If electronegativity of Cs and F is 0.7 and 4.0 respectively.
→
Identify the oxidising and reducing agent in following chemical reactions :
(i) $2 M g + S O _2 \longrightarrow 2 M g O + S$
(ii) $2 Cu ^{2+}+4 I ^{-} \longrightarrow 2 CuI + I _2$
(iii) $SO _2+2 H _2 S \longrightarrow 2 H _2 O +3 S$
(iv) $S n ^{2+}+ 2 H g ^{2+} \longrightarrow H g _2{ }^{2+}+ Sn ^{4+}$
→
Why is $\mathrm{BF}_3$ planar molecule but $\mathrm{NH}_3$ is pyramidal?
→
Give different definations of Reduction reactions.
→
A human adult breathes in approximately 0.50L of air at 1atm with each breath. If an air tank holds 10L of air at 200atm, how many breaths the tank will supply?
→
Balance $\text{P}+\text{HNO}_3\xrightarrow{ \ \ \ \ \ \ \ \ }\text{H}_3\text{PO}_4+\text{NO}_2+\text{H}_2\text{O}$ by oxidation number method.
→
Justify that the following reactions are redox reactions:$2K(s) + F_2(g) → 2K^+F^-(s)$
→
Name the energy which arises due to motion of atoms or molecules in a body. How is this energy affected when the temperature is increased?
→
30 gm KCl is dissolved in 300 gm water and a solution is obtained. Calculate mass $\%$ of solution.
→