Carbon dioxide reacts with calcium carbonate to form calcium hydroxide

Calcium hydroxide decomposes to form calcium carbonate and carbon dioxide

Carbon dioxide reacts with calcium hydroxide to form calcium carbonate

Calcium carbonate decomposes to form calcium hydroxide and carbon dioxide

Respiration results in the formation of carbon dioxide & water vapour, while Combustion only forms carbon dioxide

Respiration produces heat, while Combustion produces heat & light

Respiration is a fast process, while Combustion is a slow process

Combustion requires oxygen, while Respiration does not

Wood & Coal

Petrol & Wood

CNG & Charcoal

LPG & CNG

FeO

FeO·XH₂O

Fe₂O₃

Fe₂O_3·XH₂O

Carbohydrates

Proteins

Fats

Vitamins & Minerals

Troposphere

Stratosphere

Mesosphere

Exosphere

SO₂ & NO₂

CO₂ & H₂O

CFCs & methane

F₂ & Cl₂

H₂O + CO₂ $$\frac{Light}{Chlorophyll}\rightarrow$$  Glucose

H₂O + O₂ $$\frac{Light}{Chlorophyll}\rightarrow$$  Glucose + CO₂

H₂O + CO₂ $$\frac{Light}{Chlorophyll}\rightarrow$$  Glucose + O₂

Glucose + CO₂ $$\frac{Light}{Chlorophyll}\rightarrow$$  H₂O + O₂

To show that air contains carbon dioxide

To show plants respire

To show candle burns outside a gas jar

To show that air is required for combustion