The thermal decomposition of HCOOH is a first order reaction with a rate constant of 2.4×10-3s-1 at certain temperature. Calculate how long will it take for three fourths of initial quantity of HCOOH to decompose?
 
1.  578 s

 


When a graph is plotted for log k vs \(\frac{1}{T}\)a straight line with a slope -6670 K is obtained. The activation energy for this reaction will be:
(R = 8.314 JK-1mol-1).
Subtopic:  Arrhenius Equation |
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The statement among the following that is not correct about the order of a reaction is:

1.  The order of a reaction can be a fractional number.
2.  The order of a reaction is an experimentally determined quantity.
3.  The order of a reaction is always equal to the sum of the stoichiometric coefficients of reactants in
the balanced chemical equation for a reaction.
4.  The order of a reaction is the sum of the powers of molar concentrations of the reactants in the rate law expression.
Subtopic:  Definition, Rate Constant, Rate Law |
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Which is the correct statement about birth control pills?
 

1.  Contain estrogen only
2.  Contain progesterone only
3.  Contain a mixture of estrogen and progesterone dertivatives
4.  Progesterone enhances ovulation

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Glycogen is a branched chain polymer of α-D-glucose units in which chain is formed by C1-C4glycosidic linkage whereas branching occurs by the formation of C1-C6 glycosidic linkage. Structure of glycogen is similar to
 

1.  amylose
2.  amylopectin
3.  cellulose
4.  glucose

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