AQA A LEVEL Chemistry
EXAM 1 QUESTIONS AND
VERIFIED CORRECT
ANSWERS GRADED A+
LATEST 100% GUARANTEED
PASS
Suggest why a catalyst used in a process may become less efficient if the reactants contain
impurities. - CORRECT ANSWER-Impurities block the active site.
Topic 6 - CORRECT ANSWER-Chemical Equilibria, Le Châtelier's principle and Kc
Topic 7 - CORRECT ANSWER-Oxidation, Reduction and Redox Equations
Topic 8 - CORRECT ANSWER-Periodicity
Topic 9 - CORRECT ANSWER-Group 2, the Alkaline Earth Metals
Topic 10 - CORRECT ANSWER-Group 7, the Halogens
Topic 11 - CORRECT ANSWER-Introduction to Organic Chemistry
State the meaning of the term structural isomers. - CORRECT ANSWER--same molecular formula
-different structural formula
Topic 12 - CORRECT ANSWER-Alkanes
, State the term saturated and hydrocarbon as applied to saturated hydrocarbons. - CORRECT
ANSWER--saturated= no carbon-carbon double bonds
-hydrocarbon= compound made only of carbon and hydrogen
State two general features of a homologous series of compounds. - CORRECT ANSWER--same
functional group
-similar chemical properties
-same general formula
-each compound differs by CH2
-gradual change in physical properties
Explain what is meant by the term fraction as applied to fractional distillation. - CORRECT
ANSWER-a group of molecules with similar boiling points / similar chain length
Explain why the sulfur compounds in crude oil should be removed from the fractions before
they are used for central heating fuel. - CORRECT ANSWER--react to form sulfur dioxide
-which causes acid rain
Explain how oxides of nitrogen are formed during the combustion of alkanes. - CORRECT
ANSWER--nitrogen and oxygen in the air
-react at high temperatures to form NO, NO2 etc.
Explain why the melting point of dodecane is higher than the melting point of the straight-chain
alkane produced by cracking dodecane. - CORRECT ANSWER--larger molecule with more
electrons
-more and stronger van der Waals' forces
EXAM 1 QUESTIONS AND
VERIFIED CORRECT
ANSWERS GRADED A+
LATEST 100% GUARANTEED
PASS
Suggest why a catalyst used in a process may become less efficient if the reactants contain
impurities. - CORRECT ANSWER-Impurities block the active site.
Topic 6 - CORRECT ANSWER-Chemical Equilibria, Le Châtelier's principle and Kc
Topic 7 - CORRECT ANSWER-Oxidation, Reduction and Redox Equations
Topic 8 - CORRECT ANSWER-Periodicity
Topic 9 - CORRECT ANSWER-Group 2, the Alkaline Earth Metals
Topic 10 - CORRECT ANSWER-Group 7, the Halogens
Topic 11 - CORRECT ANSWER-Introduction to Organic Chemistry
State the meaning of the term structural isomers. - CORRECT ANSWER--same molecular formula
-different structural formula
Topic 12 - CORRECT ANSWER-Alkanes
, State the term saturated and hydrocarbon as applied to saturated hydrocarbons. - CORRECT
ANSWER--saturated= no carbon-carbon double bonds
-hydrocarbon= compound made only of carbon and hydrogen
State two general features of a homologous series of compounds. - CORRECT ANSWER--same
functional group
-similar chemical properties
-same general formula
-each compound differs by CH2
-gradual change in physical properties
Explain what is meant by the term fraction as applied to fractional distillation. - CORRECT
ANSWER-a group of molecules with similar boiling points / similar chain length
Explain why the sulfur compounds in crude oil should be removed from the fractions before
they are used for central heating fuel. - CORRECT ANSWER--react to form sulfur dioxide
-which causes acid rain
Explain how oxides of nitrogen are formed during the combustion of alkanes. - CORRECT
ANSWER--nitrogen and oxygen in the air
-react at high temperatures to form NO, NO2 etc.
Explain why the melting point of dodecane is higher than the melting point of the straight-chain
alkane produced by cracking dodecane. - CORRECT ANSWER--larger molecule with more
electrons
-more and stronger van der Waals' forces
