Chemistry
Grade-8
Easy
Question
In the nuclear fission process:
- Helium is obtained in this process
- Large nucleus is split into two smaller nuclei
- Two smaller nuclei merger to form a big heavier nucleus
- The bonds between reactant breaks
Hint:
The word fission means splitting or dividing.
The correct answer is: Large nucleus is split into two smaller nuclei
- In nuclear fission, atoms split and release energy. All nuclear power plants use nuclear fission and most use uranium atoms.
- In nuclear fission, neutrons collide with uranium atoms and split them apart, releasing large amounts of energy in the form of heat and radiation.
- The fission of uranium atoms also releases more neutrons. These neutrons continue to collide with other uranium atoms, repeating the process over and over again.
Related Questions to study
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
Chemistry
A sample of acid and alkali reacts together. The temperature increases by 25℃. The nature of this reaction is:
A sample of acid and alkali reacts together. The temperature increases by 25℃. The nature of this reaction is:
ChemistryGrade-8
