1) Trichloromethane is also called a. chlorophyll b. chloroplast c. chloromethane d. chloroform
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2) Loss of hydrogen halide from alkyl halide gives a. alkenes b. alkanes c. alkynes d. halogens
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3) The reaction of any substance with air is called a. carbation b. halogenation c. sublimation d. combustion
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4) Vicinal dihalide eliminates two molecules of hydrogen halides from adjacent carbon atoms on treatment with a. Zn dust b. calcium hydroxide c. alcoholic potassium hydroxide d. calcium chloride
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5) Which of the following is not true about alkynes? a. they are unsaturated hydrocarbons b. they are saturated hydrocarbons c. they are non-polar d. they dissolve readily in organic solvents
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6) In alkenes, the two carbon atoms forming double bond are joined to how many atoms? a. one b. two c. three d. four
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7) What is the physical state of alkanes containing five to seventeen carbon atoms? a. solid b. liquid c. gas d. plasma
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8) First three members of alkynes are a. solids b. liquids c. gases d. plasma
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9) Which of the following is not true about alkenes? a. they are unsaturated hydrocarbons b. they are insoluble in water c. they are soluble in organic solvents such as alcohol d. they are soluble in water
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10) Which of the following is used in oxy-acetylene torches for welding and cutting metals? a. Ethyne b. ethene c. ethane d. methane
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