SASS Chem Air

Page 1 ST ANDREW’S SECONDARY SCHOOL NAME CLASS DATE CHEMISTRY 19.1 Air THE ATMOSPHERE AND ENVIRONMENT Assessment for Learning 1 Dry air is passed over hot copper repeatedly until all the oxygen has reacted. The volume of gas at the end of the reaction is 120 cm3. What is the starting volume of dry air? A 132 cm3 B 152 cm3 C 180 cm3 D 570 cm3 2 What is the correct order of abundance of the gases in air? A Nitrogen ® Oxygen ® Argon ® Carbon dioxide B Nitrogen ® Oxygen ® Carbon dioxide ® Argon C Oxygen ® Nitrogen ® Argon ® Carbon dioxide D Oxygen ® Nitrogen ® Carbon dioxide ® Argon 3 Which atmospheric pollutant is produced from the combustion of octane, C8H18? A Carbon B Carbon dioxide C Carbon monoxide D Methane 10 © UCLES 2018 0439/13/M/J/18 27 D r y a i r i s p a s s e d o v e r h o t c o p p e r u n t i l a l l t h e o x y g e n h a s r e a c t e d . heat copperdry air The volume of gas at the end of the reaction is 120 cm3. What is the starting volume of dry air? A 1 3 2 cm3 B 1 5 2 cm3 C 1 8 0 cm3 D 5 7 0 cm3 28 A s t e e l b i c y c l e w h i c h h a d b e e n l e f t o u t d o o r s f o r s e v e r a l m o n t h s w a s s t a r t i n g t o r u s t . What would not reduce the rate of corrosion? A Remove the rust and paint the bicycle. B Remove the rust and store the bicycle in a dry shed. C Remove the rust and wipe the bicycle with a clean, damp cloth. D Remove the rust and wipe the bicycle with an oily cloth. 29 W h i c h s t a t e m e n t s a b o u t w a t e r a r e c o r r e c t ? 1 Household water contains dissolved salts. 2 Water for household use is filtered to remove soluble impurities. 3 Water is treated with chlorine to kill bacteria. 4 Water is used in industry for cooling. A 1 , 2 , 3 a n d 4 B 1 , 2 a n d 3 o n l y C 1 , 3 a n d 4 o n l y D 2 , 3 a n d 4 o n l y

Page 2 4 An experiment to determine the percentage of oxygen in 150 cm3 of polluted air is shown. The apparatus is left for one week. After this time, the volume of gas in the measuring cylinder is 122 cm3. What is the percentage of oxygen, to the nearest whole number, in the polluted air? A 19% B 21% C 28% D 81% 5 Which gas is not present in clean air? A Argon B Carbon dioxide C Carbon monoxide D Water vapour 12 © UCLES 2017 0620/12/F/M/17 29 Two reactions, X and Y, produce carbon dioxide. X Y CH4 CO2 CaCO3 Which types of reaction are X and Y? X Y A combustion combustion B combustion thermal decomposition C thermal decomposition combustion D thermal decomposition thermal decomposition 30 An experiment to find the percentage of oxygen in 150 cm3 of polluted air is shown. water damp iron wool measuring cylinder 150 cm3 of polluted air The apparatus is left for one week. After this time, the volume of gas in the measuring cylinder is 122 cm3. What is the percentage of oxygen, to the nearest whole number, in the polluted air? A 1 9 % B 21% C 28% D 81% 31 A m m o n i a i s p r o d u c e d w h e n a m i x t u r e o f a m m o n i u m c h l o r i de and substance X is heated. What is substance X? A a m m o n i u m s u l f a t e B b a r i u m c h l o r i d e C calcium hydroxide D silver nitrate