Activation energy
Activation energy is a Science & Technology concept from the MPSC syllabus, tested in 4 past MPSC questions (2016, 2023, 2024). Below are those real questions with their correct answers and explanations, plus the concepts worth being comfortable with first.
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Real questions that test this
सौर किंवा प्रकाश रासायनिक अभिक्रियेत सक्रियकरण ऊर्जा ही ____________ अवलंबून असते. The energy of activation depends upon ___________ in photochemical reaction.
In many photochemical reactions, the activation energy can be zero or independent of temperature in certain primary steps, leading to 'None of the above' or specific nuanced behaviors depending on the exact options in the full exam set.
जस जशी रासायनिक अभिक्रिया होत रहाते वेळेनुसार तिचा वेग _________ With the progress of any chemical reaction, the rate of the chemical reaction _________ with time.
The rate of a chemical reaction generally decreases with time as the concentration of reactants decreases and gets converted into products.
खालील विधाने विचारत घ्या. रासायनिक अभिक्रियेचा दर हा ______ वरीलपैकी कोणते विधान/विधाने बरोबर आहेत ? / Consider the following statements : Rate of a chemical reaction is _______ Which of the statement given above is/are correct ?
(a)अभिक्रियाकारकांच्या संहतीच्या प्रमाणात बदलतो. / proportional to the concentration of reactants.
(b)अभिक्रियाकारकांची संहती वाढविली की, कमी होतो. / decreases on increasing the concentration of reactants.
(c)तापमान वाढविले की, वाढतो. / increases on increasing the temperature.
(d)तापमान वाढविले की, कमी होतो. / decreases on increasing the temperature.
The rate of a chemical reaction is directly proportional to the concentration of reactants (higher concentration means more collisions) and increases with an increase in temperature (higher kinetic energy).
खालीलपैकी कोणती विधाने बरोबर आहेत ? Which of the following statement/s is/are correct ?
(a)विकरे हे सेंद्रिय उत्प्रेरक आहेत, जे जैवरासायनिक अभिक्रियांना गती देतात. / Enzymes are organic catalyst that accelerate biochemical reaction.
(b)विकरे प्रथिनांपासून बनलेली असतात. / Enzymes are made up from proteins.
(c)विकरांची क्रियाशीलता तापमानावर अवलंबून नसते. / Enzyme activity is not depends upon temperature.
(d)अमायलेज हे विकर स्टार्चवर कार्य करते. / Amylase is an enzyme that act on starch.
Enzymes are proteinaceous organic catalysts that accelerate biochemical reactions. Their activity is heavily dependent on temperature (denaturing at high temperatures and slowing down at low temperatures), and amylase specifically acts on starch.