Classification, isomerism, nomenclature, preparation
- Which one of the following reactions does NOT give benzene as the product ? Answer: 4. benzenediazonium chloride with H₂O , warm Key idea: identify the product of each reaction. Sodium benzoate + soda lime, heat: dec... 1
- Given below are two statements:Statement I : The boiling point of three isomeric pentanes follows the ordern-pentane > isopentane > neopentaneStatement II : When branching increases, the molecule attains a shape of sphere. This results in smaller sur… Answer: 2. Both Statement I and Statement II are correct. Key idea: among isomers, more branching means a more spherical shape and a lower b... 1
- Weight (g) of two moles of the organic compound, which is obtained by heating sodium ethanoate with sodium hydroxide in presence of calcium oxide is : Answer: 3. 32 Key idea: Sodium ethanoate heated with soda lime (NaOH + CaO) undergoes decarboxylation to give an alkane with one carbon fewe... 1
- CH_3CH_2COO^-Na^+ [Heat]NaOH,\ +\ ? CH_3CH_3 + Na_2CO_3.Consider the above reaction and identify the missing reagent/chemical. Answer: 3. CaO Key idea: decarboxylation of a sodium carboxylate with soda lime. mathrmCH₃CH₂COONa+NaOHxrightarrowCaO,\ ΔCH₃CH₃+Na₂CO₃ . The... 1
- Which of the following alkane cannot be made in good yield by Wurtz reaction ? Answer: 3. n-Heptane The Wurtz reaction ( 2RX+2Na→ R-R ) gives good yield only when both alkyl groups are the same, so one alkyl halide is u... 1