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What two things are necessary for fusion reaction to take place in a star?

High temperature and high pressure are necessary for fusion reactions to take place in a star. The high temperature is needed to overcome the electrostatic repulsion between positively charged atomic nuclei, while the high pressure is needed to confine the high temperature plasma.


What are the two necessary conditions for cracking to take place?

The two necessary conditions for cracking to take place are high temperature and presence of a catalyst. High temperature allows for the breaking of chemical bonds in the hydrocarbon molecules, while the catalyst accelerates the cracking reaction by providing an alternative pathway with lower activation energy.


Why does no reaction take place between methane and chlorine at room temperature?

For a reaction between oxygen molecule and hydrogen molecule to take place the bond between the two oxygen atom in O2 and the two hydrogen atom in H2 is required to be breaked. For this process a high temperature is needed which is not possible at room temperature. Since no bond breaks to make an reacting atom, the reaction does not takes place at room temperature


If heat must be added to a chemical reaction for the reaction to take place the reaction is?

Endothermic reactions need heat. Exothermic reactions give off heat.


Will a reaction take place if Ca H2O?

Yes. The reaction would be Ca + H2O --> Ca(OH)2 + H2. Hope that helped.


What makes a reaction to happen?

In A Chemical Reaction the following take place a) there is evolution of a gas b) change in colour c) change in state d) change in temperature


What does lowering the temperature have on the speed of most chemical reactions?

The molecules will have less energy because temperature, especially heat, proviedes energy and the chemical reaction will take place in a lesser amount of time than with a chemical reaction under high temperature.


What happens to make a chemical reaction?

In A Chemical Reaction the following take place a) there is evolution of a gas b) change in colour c) change in state d) change in temperature


When does photosynthesis accur?

Light reaction take place in day time. Dark reaction take place at night


What reaction takes places in the thylakoid disc of the chloroplast?

Light reaction takes place. The first step of photosynthesis


Does the reaction between non-metals and acid take place?

no reaction takes place


What type of reaction take place in rancidity?

chemical reaction takes place in rancidity