Chemistry
Grade-8
Easy
Question
Which of the following are considered as the endothermic reactions?
- Melting Ice cubes
- Lightning of Match
- Formation of water
- Acid- base reaction
Hint:
In endothermic reactions, external heat is required for the reaction to move forward.
The correct answer is: Melting Ice cubes
- An endothermic process is a thermodynamic process with an increase in the enthalpy H of the system. In such processes, closed systems typically absorb thermal energy from the surroundings and transfer heat to the system.
- Ice melting is essentially an endothermic reaction, where ice consumes (thermal) energy to enable the transition. The process is endothermic because the ice cubes need heat to melt.
Related Questions to study
Chemistry
In the nuclear fission process:
In the nuclear fission process:
ChemistryGrade-8
Chemistry
Categorize the following process into the exothermic and endothermic reactions.
A. Splitting gas molecule
B. Baking bread
C. Mixing water with calcium oxide
D. Melting solid salts
E. Rusting of Iron
Categorize the following process into the exothermic and endothermic reactions.
A. Splitting gas molecule
B. Baking bread
C. Mixing water with calcium oxide
D. Melting solid salts
E. Rusting of Iron
ChemistryGrade-8
Chemistry
Neutralization reactions are exothermic reactions. The product obtained in the neutralization reactions are:
Neutralization reactions are exothermic reactions. The product obtained in the neutralization reactions are:
ChemistryGrade-8
Chemistry
In the nuclear fission the element which is used for this process is:
In the nuclear fission the element which is used for this process is:
ChemistryGrade-8
Chemistry
Which of the following picture illustrates the exothermic reactions:
Which of the following picture illustrates the exothermic reactions:
ChemistryGrade-8
Chemistry
Everyday uses of exothermic reactions includes:
(i) Self-heating cans - 
(ii) Sport injury pack - 
(iii) Burning of petrol - 
(iv) Melting solid salts - 
Everyday uses of exothermic reactions includes:
(i) Self-heating cans -
(ii) Sport injury pack -
(iii) Burning of petrol -
(iv) Melting solid salts -
ChemistryGrade-8
Chemistry
Match the column A (Process) with Column B(Reactants used in process)
Match the column A (Process) with Column B(Reactants used in process)
ChemistryGrade-8
Chemistry
What type of reaction is respiration ?
What type of reaction is respiration ?
ChemistryGrade-8
Chemistry
During the photosynthesis process plants prepare their own food by using sunlight and :
During the photosynthesis process plants prepare their own food by using sunlight and :
ChemistryGrade-8
Chemistry
The _________ reaction is one of that absorb the heat energy from the surrounding.
The _________ reaction is one of that absorb the heat energy from the surrounding.
ChemistryGrade-8
Chemistry
Evaporation is a type of process which a substance directly changes from :
Evaporation is a type of process which a substance directly changes from :
ChemistryGrade-8
Chemistry
Exothermic reaction are the reaction that releases :
Exothermic reaction are the reaction that releases :
ChemistryGrade-8
Chemistry
Endothermic reaction are always:
Endothermic reaction are always:
ChemistryGrade-8
Chemistry
__________ is the chemical process in which substance combines with oxygen to gives off heat.
__________ is the chemical process in which substance combines with oxygen to gives off heat.
ChemistryGrade-8
Chemistry
In the endothermic reaction temperature of surrounding keeps _______.
In the endothermic reaction temperature of surrounding keeps _______.
ChemistryGrade-8
