MCQ
In the following reaction,
$\mathrm{C}\mathrm{H}_{3} -\mathrm{C} \equiv \mathrm{CH} \xrightarrow[873\;K]{\text { red hot iron tube}} \mathrm{A}$
the number of sigma$(\sigma)$ bonds present in the product $A$ is
- ✓$21$
- B$9$
- C$24$
- D$18$
✓
Answer
Correct option: A.
$21$
a
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
When sodium and chlorine reacts then
If $Br^-$ configuration is $[Ar]\, 3d^{10}\,4s^2\,4p^6$ then $Br^{+2}$ configuration will be identical to which element ?
→The density of ' $x$ ' $\mathrm{M}$ solution (' $\mathrm{x}$ ' molar) of $\mathrm{NaOH}$ is $1.12 \mathrm{~g} \mathrm{~mL}^{-1}$. while in molality, the concentration of the solution is $3 \mathrm{~m}$ ( $3 \mathrm{molal})$. Then $\mathrm{x}$ is
→(Given : Molar mass of $\mathrm{NaOH}$ is $40 \mathrm{~g} / \mathrm{mol}$ )
A given mass of gas expands reversibly from the state $A$ to the state $B$ by three paths $1, 2$ and $3$ as shown in the figure. If $w_1, w_2$ and $w_3$ respectively be the work done by the gas along three paths then:
→The correct order of electronegativity for given elements is:
Resonance hybrid of nitrate ion is
Assertion : For a reaction $2NH_3(g) \to N_2(g) + 3H_2 (g)$ ; $\Delta H > \Delta E$.
Reason : Enthalpy change is always greater than internal energy change.
→Reason : Enthalpy change is always greater than internal energy change.
Mass of methane required to produce $22 \mathrm{~g}$ of $\mathrm{CO}_2$ after complete combustion is ___________$g.$ (Given Molar mass in $g$ mol-1 $\mathrm{C}=12.0$ $ \mathrm{H}=1.0 $ $ \mathrm{O}=16.0)$
→Which is correctly matched
Calculate $\Delta H_f^o$ for $UBr_4$ from the $\Delta G^o$ of reaction and the $S^o$ values :- $U(s) + 2Br_2(\ell ) \to UBr_4(s);\,\,$ $\,\,\Delta G^o =\,-\,788.6\,\,kJ;$
$S^o (J/K-mol)\,\, 50.3, 152.3, 242.6$ .....$kJ/mol$
→$S^o (J/K-mol)\,\, 50.3, 152.3, 242.6$ .....$kJ/mol$