4 Which reaction involves burning of hydrocarbons? A Addition B Halogenation C Combustion D Substitution
6 Which hydrocarbon readily undergoes addition reactions? A Alkane B Alkene C Cycloalkane D Alkane only
7 The reaction of ethene with hydrogen is called: A Halogenation B Hydrogenation C Oxidation D Substitution
8 Which type of hydrocarbons contain only single bonds? A Alkenes B Alkynes C Alkanes D Aromatic hydrocarbons
11 Hydrocarbons are organic compounds that contain: A Carbon and oxygen B Carbon and hydrogen C Hydrogen and nitrogen D Carbon, hydrogen and oxygen
12 Hydrocarbons are important because they are: A Only laboratory chemicals B Main source of fuels and raw materials C Non-combustible D Only pollutants
13 Complete combustion of hydrocarbons produces: A CO and water B CO2 and water C Carbon and water D Hydrogen only
14 Structural isomers differ in their: A Number of atoms B Arrangement of atoms C Molecular mass D Chemical formula
15 Structural isomers have the same: A Structural formula B Chemical properties only C Molecular formula D Physical properties
16 The structural formula shows: A Molecular mass B Arrangement of atoms C Number of isomers D Physical state
20 Which reaction of hydrocarbons releases energy? A Addition B Halogenation C Combustion D Isomerization
21 Bromine water test is used to detect: A Saturated hydrocarbons B Unsaturated hydrocarbons C Alcohols D Acids
23 Which type of hydrocarbons are least reactive? A Alkenes B Alkynes C Alkanes D Unsaturated hydrocarbons
24 Addition reaction occurs due to presence of: A Single bond B Double or triple bond C Ionic bond D Hydrogen bond
28 Which condition is required for halogenation of alkanes? A Darkness B Sunlight or UV light C Low temperature D Water