1 Lara is studying the halogenation of methane. She knows that chlorine reacts with methane in the presence of UV light. What is the product when one chlorine atom substitutes one hydrogen atom? A CH2Cl2 B CH3Cl C CHCl3 D CCl4
2 Khalid is learning about the preparation of alkanes by the reduction of alkyl halides. He uses 2-bromobutane (C4H9Br) and reduces it. What alkane is formed? A Butane B Pentane C Propane D Ethane
3 Hydrocarbons are important because they are: A Only laboratory chemicals B Main source of fuels and raw materials C Non-combustible D Only pollutants
5 Ahmed is studying hydrocarbons. He learns that alkanes are saturated hydrocarbons with single bonds. What is the general formula for alkanes? A CnH2n B CnH2n+2 C CnH2n-2 D CnHn
6 Complete combustion of hydrocarbons produces: A CO and water B CO2 and water C Carbon and water D Hydrogen only
8 Rachel is studying the cracking of larger hydrocarbons. She knows that cracking is used to meet the demand for gasoline. Which fraction of petroleum is cracked to produce more gasoline? A Petroleum gas B Naphtha C Diesel D Residue
9 Patricia is studying the properties of alkanes. She knows that alkanes are non-polar and do not dissolve in water. What is the reason for their non-polarity? A They contain polar bonds B The electronegativity difference between carbon and hydrogen is small C They form hydrogen bonds D They are ionic compounds
10 Emma is studying the properties of alkanes. She knows that alkanes undergo halogenation reactions. What is halogenation? A Reaction of alkanes with halogens B Reaction of alkanes with oxygen C Reaction of alkanes with hydrogen D Reaction of alkanes with water
12 Quinn is learning about the preparation of alkanes by hydrogenation of alkenes. He knows that hydrogenation requires a catalyst. What is the role of the catalyst? A To increase the temperature B To provide hydrogen atoms C To lower the activation energy D To react with the alkene
14 Hina is studying incomplete combustion. She knows that when there is insufficient oxygen, carbon monoxide is formed. What is the danger of carbon monoxide? A It is a greenhouse gas B It is toxic and can cause poisoning C It is harmless D It is used as fuel
15 Which pair represents structural isomers? A Ethane and propane B Butane and isobutane C Ethene and ethyne D Methane and ethane
16 Tina is studying incomplete combustion. She knows that incomplete combustion of methane produces carbon monoxide and water. What is the equation for incomplete combustion of methane? A CH4 + 2O2 → CO2 + 2H2O B CH4 + 1.5O2 → CO + 2H2O C CH4 + O2 → C + 2H2O D Both B and C
17 Quinn is studying the reduction of alkyl halides. He knows that alkyl halides can be reduced to alkanes. What is the reducing agent for converting iodomethane (CH3I) to methane? A Zn/HCl B H2/Ni C NaBH4 D LiAlH4
18 Structural isomers have the same: A Structural formula B Chemical properties only C Molecular formula D Physical properties
19 Emma is learning about incomplete combustion. She knows that when there is insufficient oxygen, carbon monoxide or carbon is produced. What is the effect of carbon monoxide on humans? A It causes headache and dizziness B It is a nutrient C It is safe to breathe D It improves health
20 George is studying the cracking of larger hydrocarbons. He knows that catalytic cracking uses a catalyst. What is a common catalyst used in catalytic cracking? A Zeolite B Platinum C Iron D Nickel
21 Halogenation of alkanes is an example of: A Addition reaction B Substitution reaction C Elimination reaction D Oxidation reaction
22 George is studying complete combustion of methane. He writes the equation: CH4 + 2O2 → CO2 + 2H2O. What is the product of complete combustion? A Carbon monoxide and water B Carbon dioxide and water C Carbon and water D Methanol and water
23 Lara is studying the dehydrogenation of alkanes to alkenes. She knows that ethane can be converted to ethene. What is the type of reaction? A Oxidation B Reduction C Dehydrogenation D Halogenation
24 Xia is studying the combustion of alkanes. She knows that alkanes burn with a clean flame when complete combustion occurs. What color is the flame of complete combustion? A Blue B Yellow C Red D Green
25 Ming is studying the cracking of larger hydrocarbons. He knows that cracking produces alkenes, which are more reactive than alkanes. What is the use of alkenes produced from cracking? A As fuels B As starting materials for polymers C As solvents D As cleaning agents