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Chemistry · PYQ NEET UG 2026

हिन्दी

Consider the following reaction sequences and choose the correct option.

Question diagram
  1. A
    K and L are geometrical isomers
  2. B
    K and L are enantiomers
  3. C
    M and N are geometrical isomers
  4. D
    M and N are stereoisomers
View Answer & Solution

Correct answer · Option C

M and N are geometrical isomers

Explanation

Reduction of alkyne with Na/liq. NH3 gives trans-alkene (L) while with Lindlar's catalyst gives cis-alkene (K). Subsequent addition of HBr to cis and trans alkenes yields diastereomers (M and N), which are geometrical isomers.

Related questions

The green paramagnetic species formed by heating KMnO4 at 513 K is→Two moles of an ideal gas undergo free expansion from $10\text{ L}$ to $100\text{ L}$ at $300\text{ K}$. The values of $\Delta S_{\text{system}}$ and $\Delta S_{\text{surroundings}}$ are (R is universal gas constant)→Match the species in List I with their geometry in List II List I List II A \( \text{PCl}_5 \) I. Tetrahedral B \( \text{BrF}_5 \) II. Square Planar C \( \text{BF}_4^- \) III. Trigonal bipyramidal D \( [\text{Ni(CN)}_4]^{2-} \) IV. Square pyramidal Choose the correct answer from the options given below:→Statement-I : Heating \( \text{NaCl} \) with concentrated \( \text{H}_2\text{SO}_4 \) and \( \text{MnO}_2 \) results in oxidation of \( \text{Mn} \). Statement-II : Heating \( \text{NaI} \) with concentrated \( \text{H}_2\text{SO}_4 \) and \( \text{MnO}_2 \) results in reduction of \( \text{Mn} \). In light of the above statements, choose the most appropriate answer from the options given below:→
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