Heat Evolved
Trending Questions
The reactions which produce light and heat are known as _______________.
combustion reaction
exothermic reaction
endothermic reaction
photochemical reaction
Statement 1: Nitrogen and hydrogen combine together to form ammonia.
Statement 2: It is an exothermic reaction.
Statement 1 is false and Statement 2 is true
Both Statement1 and Statement2 are true.
The Statement1 is true but the Statement 2 is false.
Both Statement 2 and Statement 1 are false.
Burning of coal ______energy.
absorbs
releases and then absorbs
can't predict
releases
When water is added to quick lime,
a little amount of heat energy is evolved.
a large amount of heat energy is evolved.
a large amount of heat energy is absorbed.
a little amount of heat energy is absorbed.
What happens when quick lime is added to water?
Heat is evolved
Heat is absorbed
Nothing
No change in heat
Respiration is an exothermic process (release of energy).
True
False
Which among the following is an exothermic reaction (releases energy)?
Melting solid salts
Heating water
All of the given options
Reaction during respiration
When dilute hydrochloric acid reacts with sodium hydroxide,
some heat is absorbed
some heat is released
no heat is released
depends
During a chemical reaction, if the reactants have more chemical energy than the products formed,
energy is absorbed
energy is released
no changes in energy
depends
- Evaporation
- Sublimation
- Combustion
- Melting