JEE Mains · Chemistry · STD 11 - 9. Hydricarbon
Consider the following chemical reaction. \(CH \equiv CH\xrightarrow[{{\text{(2) CO , HCl , AlC}}{{\text{l}}_3}}]{{{\text{(1) Red hot Fe tube, 873 K}}}}\) Product The number of \(sp ^{2}\) hybridized carbon atom(s) present in the product is ..........
- A \(3\)
- B \(9\)
- C \(4\)
- D \(7\)
Answer & Solution
Correct Answer
(D) \(7\)
Step-by-step Solution
Detailed explanation
In benzaldehyde total number of \(sp ^{2}{ }^{\prime} C ^{\prime}\) are 7 .
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
- White Phosphorus on reaction with concentrated \(NaOH\) solution in an inert atmosphere of \(\mathrm{CO}_{2}\) gives phosphine and compound \((\mathrm{X}) .(\mathrm{X})\) on acidification with \(HCl\) gives compound \((Y)\). The basicity of compound \((Y)\) isJEE Mains 2020 Hard
- Identify the reagents used for the following conversion.
JEE Mains 2024 Hard - Identify \(\mathrm{A}, \mathrm{B}\) and C in the given below reaction sequence.
\(\mathrm{A} \xrightarrow{\mathrm{HNO}_3} \mathrm{~Pb}\left(\mathrm{NO}_3\right)_2 \xrightarrow{\mathrm{H}_2 \mathrm{SO}_4}\) B \(\xrightarrow[\substack{\text { (2) Acetic acid } \\ \text { (3) } \mathrm{K}_2 \mathrm{CrO}_4}]{\substack{\text { (1) Ammonium } \\ \text { acetate }}}\)JEE Mains 2025 Hard - For a \(d ^{4}\) metal ion in an octahedral field, the correct electronic configuration is:JEE Mains 2020 Medium
- Evaluate the following statements for their correctness. \((A)\) The elevation in boiling point temperature of water will be same for \(0.1 M NaCl\) and \(0.1 M\) urea. \((B)\) Azeotropic mixtures boil without change in their composition \((C)\) Osmosis always takes place from hypertonic to hypotonic solution \((D)\) The density of \(32 \% H _2 SO _4\) solution having molarity \(4.09\,M\) is approximately \(1.26\,g\,mL ^{-1}\) \((E)\) A negatively charged sol is obtained when \(KI\) solution is added to silver nitrate solution. Choose the correct answer from the options given below :JEE Mains 2023 Hard
- Consider the following reaction sequence:
\(\begin{array}{lll}\underset{\text {Compound }( x )}{ } \frac{\begin{array}{c}\text { (i) } CO _2, NaOH , 120^{\circ} C , \\ \text {high pressure }\end{array}}{\text { (ii) } H _3 O ^{+}} & \text {Compound }( y ) \\ {[76.6 \% C , 6.38 \% H ,} & \text { (Major Product) } \\ \text {vapour density } 47] & & \end{array}\)
Compound (y) develops characteristic colour with neutral \(FeCl _3\) solution.
Identify the INCORRECT statement from the following for the above sequence.JEE Mains 2026 Medium
More PYQs from JEE Mains
- A vessel at 1000 K contains \(\mathrm{CO}_2\) with a pressure of 0.5 atm . Some of \(\mathrm{CO}_2\) is converted into CO on addition of graphite. If total pressure at equilibrium is 0.8 atm , then Kp is _______.JEE Mains 2025 Medium
- A uniform cylindrical rod of length \(L\) and radius \(r\), is made from a material whose Young's modulus of Elasticity equals \(Y\). When this rod is heated by temperature \(T\) and simultaneously subjected to a net longitudinal compressional force \(F\), its length remains unchanged. The coefficient of volume expansion, of the material of the rod, is (nearly) equals toJEE Mains 2019 Hard
- A parallel plate capacitor having capacitance \(12\, pF\) is charged by a battery to a potential difference of \(10\, V\) between its plates. The charging battery is now disconnected and a porcelain slab of dielectric constant \(6.5\) is slipped between the plates. The work done by the capacitor on the slab is.......\(pJ\)JEE Mains 2019 Hard
- Let \(f: R \rightarrow R\) be a function defined by \(f(x)=\left\{\begin{array}{l}\max \left\{t^{3}-3 t\right\} ; x \leq 2 \\ t \leq x \\ x^{2}+2 x-6 ; 2 < x < 3 \\ {[x-3]+9 ; 3 \leq x \leq 5} \\ 2 x+1 \quad ; \quad x > 5\end{array}\right\}\) Where \([t]\) is the greatest integer less than or equal to \(t\). Let \(m\) be the number of points where \(f\) is not differentiable and \(I =\int\limits_{-2}^{2} f( x ) dx\). Then the ordered pair \(( m , I )\) is equal toJEE Mains 2022 Hard
- A double slit interference experiment performed with a light of wavelength 600 nm forms an interference fringe pattern on a screen with 10 th bright fringe having its centre at a distance of 10 mm from the central maximum. Distance of the centre of the same 10th bright fringe from the central maximum when the source of light is replaced by another source of wavelength 660 nm would be _________ mm .JEE Mains 2025 Hard
- To compare EMF of two cells using potentiometer the balancing lengths obtained are 200 cm and 150 cm . The least count of scale is 1 cm . The percentage error in the ratio of EMFs is ___________.JEE Mains 2026 Medium