Explain why the solid catalyst is used in a finely divided form as heterogeneous catalysis.
Give reasons why a finely divided substance is more effective as an adsorbent.
Choose the correct alternative: Genetic drift is most effective in small population/large population.
Assertion : The enthalpy of reaction remains constant in the presence of a catalyst. Reason : A catalyst participating in the reaction, forms different activated complex and lowers down the activation energy but the difference in energy of reactant and product remains the same.
PCl_5 reacts with finely divided silver on heating and a white silver salt is obtained, which dissolves on adding excess aqueous NH_3 solution. Write the reactions involved to explain what happens.
Elaborate four methods to treat cancer. Mention any one method which is most effective to treat cancer.
Which of the following electrolytes will be most effective in causing the coagulation of a positively charged ferric hydroxide sol ?
A wire of resistance 8R is bend in the form of a circle as shown in the figure. What is the effective resistance between the ends of the diameter AB?
