91Ó°ÊÓ

When the trans-2-pentene is treated with \(\mathrm{Br}_{2}\) in the presence of \(\mathrm{CCl}_{4}\), then the number of stereoisomers formed is (a) 1 (b) 2 (c) 3 (d) 4

Major product of reaction between cycloheptyne and \(\mathrm{H}_{2} \mathrm{O}, \mathrm{H}_{2} \mathrm{SO}_{4} / \mathrm{HgSO}_{4}\) is

An optically active organic compound has the molecular formula \(\mathrm{C}_{7} \mathrm{H}_{10}\) (A). On reaction with \(\mathrm{H}_{2}+\mathrm{Pt}\) it forms an optically inactive compound (B). Then, compound (A) will be

Which of the following is most reactive towards aqueous \(\mathrm{HBr}\) ? (a) 1-Phenyl-2-propanol (b) 1-Phenyl-1-propanol (c) 3-Phenyl-1-propanol (d) 2-Phenyl-1-propanol

1-Penten-4-yne reacts with bromine at \(-80^{\circ} \mathrm{C}\) to produce (a) \(4,4,5,5\) -Tetrabromopentene (b) 1,2 -Dibromo- 1,4 -pentadiene (c) \(1,1,2,2,4,5\) -hexabromopentane (d) 4,5 -dibromopentyne

Which of the following reagents cannot be used to locate the position of triple bond in \(\mathrm{CH}_{3}-\mathrm{C}=\mathrm{C}-\mathrm{CH}_{3} ?\) (a) \(\mathrm{Br}_{2}\) (b) \(\mathrm{O}_{3}\) (c) \(\mathrm{Cu}_{2}^{2+}\) (d) \(\mathrm{KMnO}_{4}\)

Methanoic acid is heated with conc. \(\mathrm{H}_{2} \mathrm{SO}_{4}\) to form (a) \(\mathrm{CO}\) (b) \(\mathrm{CO}_{2}\) (c) \(\mathrm{CH}_{4}\) (d) \((\mathrm{COOH})_{2}\)

When ethane-1,2-dioic acid is heated with conc. \(\mathrm{H}_{2} \mathrm{SO}_{4^{\prime}}\) it gives (a) \(\mathrm{CO}+\mathrm{HCOOH}\) (b) \(\mathrm{CO}_{2}+\mathrm{HCOOH}\) (c) \(\mathrm{CO}+\mathrm{CO}_{2}+\mathrm{HCOOH}\) (d) \(\mathrm{CO}+\mathrm{CO}_{2}+\mathrm{H}_{2} \mathrm{O}\)

When sodium fumrate is heated with soda lime, we get (a) \(\mathrm{CH}_{4}\) (b) Ethyne (c) Sodium oxalate (d) No action

Sodium formate is heated at \(360^{\circ} \mathrm{C}\) to gives (a) \(\mathrm{CO}\) (b) \(\mathrm{CO}_{2}\) (c) Sodium oxalate (d) No action