MHT CET · Chemistry · Aldehydes and Ketones
Which of the following aldehydes is less reactive towards nucleophilic addition reaction?
- A Benzaldehyde
- B Formaldehyde
- C Acetaldehyde
- D Butyraldehyde
Answer & Solution
Correct Answer
(A) Benzaldehyde
Step-by-step Solution
Detailed explanation
Reactivity for N.A.R \(\propto\) Attack of Nucleophile.
\(\propto\) +ve charge on \(\mathrm{sp}^2\)-carbon
\(\propto \frac{1}{\text { Steric hindrance }}\)
\(\propto \frac{-\mathrm{M}|-\mathrm{H}|-\mathrm{I}}{+\mathrm{M}|+\mathrm{H}|+\mathrm{I}}\)
\(\frac{\mathrm{HCHO}>\mathrm{CH}_3-\mathrm{CHO}>\mathrm{CH}_3-\mathrm{CH}_2-\mathrm{CH}_2 \mathrm{CHO}>\mathrm{C}_6 \mathrm{H}_5-\mathrm{CHO}}{\text { Reactivity in decreasing order }}\)
\(\propto\) +ve charge on \(\mathrm{sp}^2\)-carbon
\(\propto \frac{1}{\text { Steric hindrance }}\)
\(\propto \frac{-\mathrm{M}|-\mathrm{H}|-\mathrm{I}}{+\mathrm{M}|+\mathrm{H}|+\mathrm{I}}\)
\(\frac{\mathrm{HCHO}>\mathrm{CH}_3-\mathrm{CHO}>\mathrm{CH}_3-\mathrm{CH}_2-\mathrm{CH}_2 \mathrm{CHO}>\mathrm{C}_6 \mathrm{H}_5-\mathrm{CHO}}{\text { Reactivity in decreasing order }}\)
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
- Calculate the change in internal energy of the system if 20 kJ work is done on the system and it releases 10 kJ heat in a particular reaction.MHT CET 2025 Easy
- Identify least stable species from following.MHT CET 2025 Medium
- Which among the following elements has lowest density and is lightest?MHT CET 2020 Easy
- Which of the following is not an iron ore?MHT CET 2012 Easy
- Which from following is a correct stability order of complex formed by metal ions if the ligand remains same?MHT CET 2024 Easy
- Molal depression constant for a liquid is \(2.77^{\circ} \mathrm{C} \mathrm{kg} \mathrm{mol}^{-1}\), in Kelvin scale it's value isMHT CET 2021 Medium
More PYQs from MHT CET
- For wavelength of visible radiation of hydrogen spectrum Balmer gave an equation as \(\lambda=\frac{\left(\mathrm{km}^2\right)}{\left(\mathrm{m}^2-4\right)}\), where \(m\) is the integer value. The value of \(k\) in terms of Rydberg's constant \(R\) isMHT CET 2022 Easy
- Dual of \((x+y)\left(x^{\prime} \cdot 1\right)\) isMHT CET 2010 Easy
- If \(\bar{a}=2 \hat{i}+3 \hat{j}+2 \hat{k}, \bar{b}=2 \hat{i}+\hat{j}-\hat{k}\) and \(\bar{c}=3 \hat{i}-\hat{j} \quad\) are such that \(\bar{a}+\lambda \bar{b}\) is perpendicular to \(\bar{c}\), then the value of \(\lambda\) isMHT CET 2023 Easy
- Two parallel plate air capacitors of same capacity ' C ' are connected in series to a battery of emf ' \(E\) '. Then one of the capacitors is completely filled with dielectric material of constant ' \(K\) '. The change in the effective capacity of the series combination isMHT CET 2024 Medium
- The maximum value of the function \(f(x)=3 x^3-18 x 2+27 x-40\) on the set \(S=\left\{x \in R x^2+30 \leq 11 x\right\}\) isMHT CET 2022 Medium
- The value of \(\int_{0}^{1} x^{2}\left(1-x^{2}\right)^{3 / 2} d x\) isMHT CET 2012 Medium