Chemistry MCQs for NEET — Practice Questions with Answers

$ Wurtz Reaction :- 2CH_3 CH_2 Cl + 2 Na \xrightarrow [] {Ether} CH_3 -CH_2 - CH_2 - CH_3 +2NaCl $

$ AlkyneC_n H_{2n-2} \rightarrow C_4 H_6 $

$ 2CH_3 CH_2 COONa^+ + 2H_2O \xrightarrow [] {Electrolysis } CH_3CH_2CH_2CH_3 + 2CO_2 + H_2 + 2 Naot $ Electrolysis of aqueous solution of Sodium Salt of Carboxylic acid gives Alkane Containing even number of carbon (Kolbe`s synthesis)

This preparation is known as Kolbe`s synthesis

$ Boiling \alpha Molecular mass \alpha { 1 \over number of branches } $

According to previous question

$ CH_3COCl + CH_3 MgCl \xrightarrow [] {H_2O} CH_3COCH_3 + MgCl_2 $ (This reaction gives Ketone)

$ C_2 H_5 O + CH_3 MgBr \rightarrow CH_4 + Mg - Br - OC_2 H_5 $

$ 2CH_3COONa^+ + 2H_2O \xrightarrow [] {Electrolysis} CH_3- CH_3+ 2CO_2 +NaOH + H_2 $

The staggered (anti) conformation of ethane is more stable than the eclipsed conformation. In the staggered conformation, the hydrogen atoms are positioned as far apart as possible, minimizing electron repulsion between the bonding pairs of electrons. This reduces the torsional strain. In contrast, the eclipsed conformation has hydrogen atoms aligned with each other, leading to increased electron repulsion and torsional strain. Therefore, the staggered conformation is more stable.