An exothermic reaction is represented by the greph :
A
B
C
D
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The correct Answer is:
c
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An endothermic reaction is represented by the graph :
What is exothermic reaction?
For an endothermic reaction, where Delta H represents the enthalpy of reaction in kJ mol^(-1) , the minimum value for the energy of activation will be
Assertion (A): The endothermic reactions are favoured at lower temperature and the exothermic reactions are favoured at higher temperature. Reason (R ) : when a system in equilibrium is disturbed by changing the temperature, it will tend to adjust itself so as to overcome the effect of the change.
Assertion : For the reaction : RCl + NaOH (aq) rarr ROH + NaCl , the rate of reaction is reduced, half when the concentration of RCl is reduced to to half cell. Reason : The rate of reactions is represented by k[RCl] i.e., it is a first order reaction.
Although combustion of fuels is exothermic reaction, yet these can be stored in contact of air and oxygen. This is mainly due to :
STATEMENT-1: The equilibrium constant of the exothermic reaction at high temperature decreases. STATEMENT-2: Since In (K_(2))/(K_(1))=(DeltaH^(@))/(R)[(1)/(T_(1))-(1)/(T_(2))] and for exothermic reaction , DeltaH^(@)= -ve and thereby, (K_(2))/(K_(1))lt1
A strudent express an exothermic reaction as: Reactant rarr Product + Heat another student represent the same reaction as : Reactant - Heat rarr Product Tell who is wrong and who is right?
Each question contains STATEMENTS-1 (Assertion) and STATEMENT -2 (Reason). Examine the statements carefully and mark the correct answer according to the instructions given below: STATEMENT-1: For exothermic reaction equilibrium constant decrease with increase in temperature. STATEMETN-2: For exothermic reaction rate constant decrease with decrease in temperature.
