Download App

Chemical Bonding and Molecular Structure — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryChemical Bonding and Molecular Structure3 Marks
Question
Consider the following structure:
$\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ {\text{O}}\\\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \|\\\ ^1\text{C}_3-\ ^2\text{CH}_2-\ ^3\text{C}-\ ^4\text{C}_2-\ ^5\text{C}\equiv\ ^6\text{CH}$
  1. How many σ and π-bonds are present in this compound?
  2. Arrange carbon no. 2, 3, 5 in decreasing order of s-character.
  3. Which atoms have same hybrid state?
✓

Answer

$\ \ \ \ \ \ \ \ {\text{H}\ \ \ \ \text{H}\ \ \ \ \ \text{O}\ \ \ \ \ \text{H}}\\ \ \ \ \ \ \ \ \ \ |\ \ \ \ \ \ |\ \ \ \ \ \ \|\ \ \ \ \ \ \ | \\\text{H}-\text{C}-\text{C}-\text{C}-\text{C}-\text{C}\equiv\text{CH}\\\ \ \ \ \ \ \ \ \ |\ \ \ \ \ \ \ |\ \ \ \ \ \ \ \ \ \ \ \ \ \ | \\\ \ \ \ \ \ \ \ \text{H}\ \ \ \ \ \text{H}\ \ \ \ \ \ \ \ \ \ \ \ \text{H}$
  1. $14\sigma$ and $3\pi$ bonds.
  2. ii. $5>3>2$ is decreasing order of $s$-character of carbon atoms, i.e. $s p>s p^2>s p^3 s p$ has $50 \% s$-character, $s p$ has $33 \%$ s-character, sp has $25 \%$ s-character.
  3. Carbon number 1, 2, 4 are $\mathrm{sp}^3$ hybridised. Carbon number 5 and 6 are sp hybridised.

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 "3 Marks Question" from Chemical Bonding and Molecular Structure→Chemical Bonding and Molecular Structure — all question types→Chemistry STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

A sample of HI(g) is placed in flask at a pressure of 0.2 atm. At equilibrium the
partial pressure of HI(g) is 0.04 atm.
What is $\text{K}_\text{p}$ for the given equilibrium?
$\text{2HI (g)}\rightleftharpoons\text{H}_2\text{ (g) + I}_2\text{ (g)}$
→
The following data are obtained when dinitrogen and dioxygen react together to form different compounds:
Fill in the blanks in the following conversions:
  1. 1km = ...................... mm = ...................... pm.
  2. 1mg = ...................... kg = ...................... ng.
  3. 1mL = ...................... L = ...................... $\text{dm}^3$.
→
What is the hybrid state of:
i. B in $\mathrm{BF}_3$.
ii. Al in $\mathrm{AlCl}_3$,
iii. Be in $\mathrm{BeCl}_2$,
iv. C in $\mathrm{CO}_2$ and $\mathrm{C}_2 \mathrm{H}_4$,
v. S in $\mathrm{SO}_2$ and $\mathrm{SO}_3$ ?
→
Which of the following sets of orbitals are degenerate and why?
i. $1 \mathrm{~s}, 2 \mathrm{~s}$ and 3 s in Mg -atom.
ii. $2 p_x, 2 p_y$ and $2 p_z$ in C -atom.
iii. $3 \mathrm{~s}, 3 \mathrm{p}_{\mathrm{x}}$ and 3 d -orbitals in H -atom.
→
221.4J is needed to heat 30 g of ethanol from $15^{\circ} C$ to $18^{\circ} C$. Calculate (a) specific heat capacity, and (b) molar heat capacity of ethanol.
→
If a given sample of water has degree of hardness equal to $46$ ppm. If entire hardness is due to $MgSO_4,$ how much $MgSO_4,$ is present per kg of water?
→
What is the relationship between the members of following pairs of structures? Are they structural or geometrical isomers or resonance contributors?
→
Calculate the molar solubility of $Ni ( OH )_2$ in 0.10 M NaOH . The ionic product of $Ni ( OH )_2$ is $2.0 \times 10^{-15}$.
→
What is meant by entropy? Predict the sign of entropy change in each of the following:
  1. $\left.\mathrm{H}_2 \text { (at } 298 \mathrm{~K}, 1 \mathrm{~atm}\right) \rightarrow \mathrm{H}_2 \text { (at } 298 \mathrm{~K}, 10 \text { atm) }$
  2. $\mathrm{H}_2 \mathrm{O}(\text { at } 298 \mathrm{~K}, 1 \mathrm{~atm}) \rightarrow \mathrm{H}_2 \mathrm{O} \text { (at } 330 \mathrm{~K}, 1 \text { atm) }$
  3. $2 \mathrm{NH}_4 \mathrm{NO}_3(\mathrm{~s}) \rightarrow 2 \mathrm{~N}_2(\mathrm{~g})+4 \mathrm{H}_2 \mathrm{O}(\mathrm{g})+\mathrm{O}_2(8)$
  4. Crystallization of copper sulphate from its saturated solution.
  5. $2\text{SO}_2(\text{g})+\text{O}_2(\text{g})\rightleftharpoons2\text{SO}_3(\text{g}).$
→
Balance the following equations:
  1. $H_3PO3 → H_3PO_4+ PH_3$
  2. $Ca + H_2O → Ca(OH)_2 +H_2$
  3. $Fe_2(SO_4)_3+ NH_3 + H_2O → Fe(OH)_3 + (NH_4)_2SO_4$
  4. $Cl_2+ NaOH → NaCl + NaClO_3 + H_2O$
→