Which is an example of an endothermic reaction? a. combustion of fuels b. burning of wood c. cellular respiration d. photosynthesis e. nuclear explosion

D. photosynthesis

Explanation:

Exothermic processes are those processes in which heat is released and endothermic processes are those processes in which heat is absorbed.

A. Combustion of fuels is an oxidation of hydrocarbons where energy is released.

B. Burning of wood is oxidation of carbon in which energy is released.

C. Cellular respiration is oxidation of food to release energy as ATP.

D. Photosynthesis is process of generation of food by green plants by use of sunlight as energy source.

E. Nuclear explosion involves nuclear reactions in which energy is released.

i think it is d. e because the next one is igneous.

out of these options:

ability to burn paper

pure sodium reacting violently with water

the boiling point of water

helium does not tend to react with anything

i would say this is a physical property:

helium does not tend to react with anything

why? :

i said helium does not tend to react with anything because well, it reacts to ! but ability to burn paper, pure sodium reacting violently with water, & the boiling point of water are chemical or

physical properties: the properties of a substance that can be observed without changing the chemical makeup of the substance

chemical properties: properties of a substance relating to the chemical nature and reactivity of the substance