91Ó°ÊÓ

The number of optical isomers formed by hydrogenation of the compound, \(\left(\mathrm{CH}_{3}\right)_{2} \mathrm{C}=\mathrm{CHCH}_{3}\) are (a) 0 (b) 1 (c) 2 (d) 3

The number and type of bonds between two carbon atoms in \(\mathrm{CaC}_{2}\) are (a) one sigma and one \(\pi\) bond (b) one sigma and two \(\pi\) bonds (c) one sigma and one and a half \(\pi\) bonds (d) one sigma bond

Which of the following has the least hindered rotation about carbon-carbon bond? (a) ethane (b) ethylene (c) acetylene (d) hexachloroethane

The \(\mathrm{Cl}-\mathrm{C}-\mathrm{Cl}\) angle in \(1,1,2,2\)-tetrachloroethene and tetrachloromethane will be about (a) \(120^{\circ}\) and \(109.5^{\circ}\) (b) \(90^{\circ}\) and \(109.5^{\circ}\) (c) \(109.5^{\circ}\) and \(90^{\circ}\) (d) \(109.5^{\circ}\) and \(120^{\circ}\)

The compound with an isopropyl group is (a) \(2,2,3,3\)-tetramethylpentane (b) 2,2 -dimethylpentane (c) \(2,2,3\)-trimethylpentane (d) 2-methylpentane

The enolic form of acetone contains (a) 9 sigma bonds, 1 pi bond and 2 lone pair of electrons (b) 8 sigma bonds, 2 pi bonds and 2 lone pair of electrons (c) 10 sigma bonds, 1 pi bond and 1 lone pair of electrons (d) 9 sigma bonds, 2 pi bonds and 1 lone pair of electrons

How many chiral carbon atoms are present in 2,3 , 4-trichloropentane? (a) three (b) two (c) one (d) four

The IUPAC name of (a) butan-2-aldehyde (b) 2-methylbutanal (c) 3 -methylisobutyraldehyde (d) 3-methylbutanal

An optically active compound is (a) 1-bromobutane (b) \(\beta\)-bromobutyric acid (c) 2-bromo-2-methylpropane (d) 1 -bromo-2-methylpropane

Which of the following compounds exhibit steroisomerism? (a) 2 -methylbutene-1 (b) 3 -methylbutyne-l (c) 3-methylbutanoic acid (d) 2-methylbutanoic acid