How would you prepare benzene from ethyne? Write its mechanism.
Benzene can be prepared from ethyne (acetylene) by the process of trimerization of acetylene. This is a classic method in organic chemistry. Reaction: 3 C₂H₂ → C₆H₆ Stepwise mechanism (Catalytic _____ _________ __________ _____ ______.
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Acetophenone to 1-Phenyl-1,3-butanedione
रूद्धोष्म प्रक्रिया के लिए तापमान और आयतन के बीच संबंध ज्ञात कीजिए। ताप पर हीलियम गैस के एक मोल का उत्क्रमणीय समतापी प्रसार प्रारंभिक आयतन
से
तक होने दिया जाता है। यह मानते हुए कि हीलियम आदर्श गैस की तरह व्यवहार करती है, गैस का अंतिम ताप ज्ञात करें। दिया है:
Differentiate between enthalpy driven and entropy driven reactions with the help of suitable examples.
Two molecule of condense in enzyme catalyzed reaction to give a molecule of disaccharide, maltose. Calculate the enthalpy of the reaction. The enthalpies of combustion of crystalline
and maltose at
are
and
, respectively.
निम्नलिखित अभिक्रिया के अभिकारक का अनुमान लगाइएः
Derive a relation between temperature and volume for an adiabatic process. of helium gas at temperature of
undergoes reversible adiabatic expansion from an initial volume of
to
. Calculate the final temperature of the gas by assuming that the helium behaves ideally and has
.
What is the chemical potential? Explain it with its significance.