Functions of Gases in Air 2 (Form 1, Chemistry)

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Quiz on oxygen, rusting, and rust prevention.

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Functions of Gases in Air 2 (Form 1, Chemistry)


Froggy Jumps Functions of Gases in Air 2 (Form 1, Chemistry)Version en ligne Quiz on oxygen, rusting, and rust prevention. par YAKILI LMS 1 What is the main element that makes up about 21% of air? a Nitrogen b Carbon dioxide c Oxygen 2 Which gas in air is most responsible for supporting combustion? a Oxygen b Nitrogen c Argon 3 What percentage of oxygen is typically found in dry air? a About 78% b About 21% c About 95% 4 Which gas is the main portion of air besides oxygen? a Nitrogen b Helium c Carbon dioxide 5 Rust forms mainly on which metal? a Iron b Copper c Aluminium 6 What is rusting a chemical reaction of iron with? a Hydrogen and nitrogen b Oxygen and water c Chlorine and water 7 Which condition promotes rusting? a Moisture b Cold temperature c Dry air 8 Which gas in air can cause fires to burn more vigorously if present? a Carbon dioxide b Nitrogen c Oxygen 9 What is the definition of rusting? a Corrosion of iron due to oxygen and water b Oxidation of copper c Melting of iron in water 10 Which gas is least reactive and makes up most of air? a Argon b Nitrogen c Oxygen 11 Which gas can dissolve in water to form carbonic acid? a Nitrogen b Carbon dioxide c Oxygen 12 Which gas helps preserve fresh fruits and slows spoilage when used in packaging in some cases? a Carbon dioxide b Oxygen c Nitrogen 13 Which gas is used to test for the presence of oxygen by relighting a glowing splint? a Oxygen b Nitrogen c Carbon dioxide 14 Defining rusting, which technology slows rust by removing water environment? a Drying the environment b Adding more oxygen c Increasing humidity 15 Which method prevents rusting by coating iron? a Heating strongly b Diluting water c Painting 16 A coating of oil on iron helps by doing what? a Increasing heat b Adding oxygen c Keeping air and moisture away 17 Which metal often forms rust when exposed to air and water? a Iron b Gold c Tin 18 Which gas in air is relatively inert and does not react easily? a Oxygen b Nitrogen c Carbon dioxide 19 Which form of rust prevention uses a barrier layer? a Etching b Coating c Aging 20 Which material can act as a rust inhibitor by removing moisture? a Desiccant b Lubricant c Acid 21 What is the purpose of galvanizing iron? a Removing oxygen b Increasing iron content c Coating with zinc to prevent rust 22 Which gas in air helps to extinguish some fires if present in high levels? a Nitrogen b Carbon dioxide c Oxygen 23 Which gas is used in some food packaging to slow spoilage? a Oxygen b Nitrogen c Water vapor 24 Which form of rust prevention uses an electric current to protect steel? a Coating b Heat treating c Cathodic protection 25 What happens when oxygen reacts with iron in the presence of water? a Hydrogen gas is released b Rust forms c Iron strengthens 26 Which gas combination is essential for rust to occur on iron? a Oxygen and water b Oxygen and nitrogen c Nitrogen and carbon dioxide 27 Which of these is a rust prevention method that blocks air contact? a Freezing b Warming c Sealing 28 Which property of air is crucial in rust formation? a Odor b Color c Moisture 29 Which gas makes up about 78% of air? a Nitrogen b Argon c Oxygen 30 What is the role of oxygen in metal corrosion? a Oxidation of metal b Lubricating metal c Cooling metal 31 Which gas is used to indicate oxygen presence in a test? a Oxygen b Helium c Nitrogen 32 Which practice reduces rust by removing water from surroundings? a Adding humidity b Cooling metals c Drying the air 33 What form of corrosion occurs on iron surfaces? a Burning b Rusting c Fading 34 Which gas supports most combustion in air? a Argon b Nitrogen c Oxygen 35 Which is a property of rusting? a Iron oxide formation b Metal hardening c Hydrogen release 36 Which gas is often used to preserve foods by reducing oxidation? a Oxygen b Carbon dioxide c Nitrogen 37 Which prevention method uses a barrier like paint or plastic? a Squeezing b Heating c Coating 38 What is the effect of carbon dioxide in air on corrosion? a High rust rate b Removes moisture c Low direct effect 39 Which practice helps prevent rust by reducing exposure? a Leave wet b Store metal indoors c Expose to rain 40 Which gas in air is the essential reactant for burning? a Oxygen b Nitrogen c Argon 41 Which rust prevention method uses a sacrificial metal? a Coating b Annealing c Cathodic protection 42 Rusting is an example of which type of process? a Oxidation b Fermentation c Reduction 43 Which gas slows metal oxidation when used to fill a container? a Water vapor b Nitrogen c Oxygen 44 Which gas is commonly removed to prevent rust in closed systems? a Moisture b Nitrogen c Oxygen 45 Which is NOT a rust prevention method? a Adding water b Painting c Oiling 46 A glowing splint re-ignites in the presence of which gas? a Nitrogen b Oxygen c Carbon dioxide 47 Which gas is often used to create inert atmospheres in labs? a Hydrogen b Nitrogen c Oxygen 48 Which factor promotes rusting in metals like iron? a Presence of moisture b Dry air c Low temperature 49 Which gas is colorless, odorless, and makes up most of air? a Nitrogen b Carbon dioxide c Oxygen 50 Which protective method coats iron with a thin metal layer? a Galvanizing b Quenching c Annealing

Functions of Gases in Air 2 (Form 1, Chemistry)

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Functions of Gases in Air 2 (Form 1, Chemistry)Version en ligne

par YAKILI LMS

What is the main element that makes up about 21% of air?

Which gas in air is most responsible for supporting combustion?

What percentage of oxygen is typically found in dry air?

Which gas is the main portion of air besides oxygen?

Rust forms mainly on which metal?

What is rusting a chemical reaction of iron with?

Which condition promotes rusting?

Which gas in air can cause fires to burn more vigorously if present?

What is the definition of rusting?

Which gas is least reactive and makes up most of air?

Which gas can dissolve in water to form carbonic acid?

Which gas helps preserve fresh fruits and slows spoilage when used in packaging in some cases?

Which gas is used to test for the presence of oxygen by relighting a glowing splint?

Defining rusting, which technology slows rust by removing water environment?

Which method prevents rusting by coating iron?

A coating of oil on iron helps by doing what?

Which metal often forms rust when exposed to air and water?

Which gas in air is relatively inert and does not react easily?

Which form of rust prevention uses a barrier layer?

Which material can act as a rust inhibitor by removing moisture?

What is the purpose of galvanizing iron?

Which gas in air helps to extinguish some fires if present in high levels?

Which gas is used in some food packaging to slow spoilage?

Which form of rust prevention uses an electric current to protect steel?

What happens when oxygen reacts with iron in the presence of water?

Which gas combination is essential for rust to occur on iron?

Which of these is a rust prevention method that blocks air contact?

Which property of air is crucial in rust formation?

Which gas makes up about 78% of air?

What is the role of oxygen in metal corrosion?

Which gas is used to indicate oxygen presence in a test?

Which practice reduces rust by removing water from surroundings?

What form of corrosion occurs on iron surfaces?

Which gas supports most combustion in air?

Which is a property of rusting?

Which gas is often used to preserve foods by reducing oxidation?

Which prevention method uses a barrier like paint or plastic?

What is the effect of carbon dioxide in air on corrosion?

Which practice helps prevent rust by reducing exposure?

Which gas in air is the essential reactant for burning?

Which rust prevention method uses a sacrificial metal?

Rusting is an example of which type of process?

Which gas slows metal oxidation when used to fill a container?

Which gas is commonly removed to prevent rust in closed systems?

Which is NOT a rust prevention method?

A glowing splint re-ignites in the presence of which gas?

Which gas is often used to create inert atmospheres in labs?

Which factor promotes rusting in metals like iron?

Which gas is colorless, odorless, and makes up most of air?

Which protective method coats iron with a thin metal layer?