Zadanie 33
How many structural isomers of dichloropentane, C5H10Cl2, can be formed by the free-radical substitution of CH3CH2CH2CH2CH3 with excess Cl2 in the presence of UV light? Ignore stereoisomers. A. 5 B. 7 C. 9 D. 12
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How many structural isomers of dichloropentane, C5H10Cl2, can be formed by the free-radical substitution of CH3CH2CH2CH2CH3 with excess Cl2 in the presence of UV light? Ignore stereoisomers. A. 5 B. 7 C. 9 D. 12
Which procedure is best for converting butan-1-ol into butanoic acid? A. Heat under reflux with an acidified oxidizing agent B. Heat under reflux with a reducing agent C. Heat with an acidified oxidizing agent and distil off the product as it forms D. Heat…
Which set of formulas is a homologous series? A. CH4, C2H4, C3H4 B. C2H6, C3H6, C4H6 C. C3H8, C3H6, C3H4 D. C2H4, C3H6, C4H8
What are the type of reaction and the role of benzene in the following reaction? C6H6 + Br+ → C6H5Br + H+ A. Type of reaction: substitution; role of benzene: nucleophile B. Type of reaction: substitution; role of benzene: electrophile C. Type of…
Which reaction involves homolytic fission of a bond? A. C2H6 + Br2 in the presence of UV light B. CH3CH2Br + NaOH(aq) warmed C. CH2=CH2 + HBr at room temperature D. C6H6 + Br2 with FeBr3 as catalyst
Which structure represents a repeating unit of the polymer formed from chloroethene, CH2=CHCl? A. −CH2−CHCl− B. −CH2−CH2− C. −CHCl−CHCl− D. −CH2−CCl2−
What is the main organic product of the reduction of butanone with LiAlH4 in dry ether? A. Butanoic acid B. Butan-1-ol C. Butan-2-ol D. Butanal
Which compound produces the following 1H NMR spectrum? A. Butanal B. Butanone C. 2-Methylpropanal D. 2-Methylpropan-1-ol
How many different signals does the 1H NMR spectrum of this compound show? A. 1 B. 2 C. 3 D. 4
A solution of barium hydroxide of concentration 0.10 mol dm−3 was added dropwise to 25 cm3 of copper(II) sulfate solution of concentration 0.10 mol dm−3 until 25 cm3 of the barium hydroxide solution had…