Bleaching powder reacts with dilute acids to evolve chlorine.
The chlorine liberated by the action of dilute acids on bleaching powder is called available chlorine.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false
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The Correct Option isB
Solution and Explanation
The reaction involved is
$CaOCl_{2} + H_{2}SO_{4} \rightarrow CaSO_{4} + H_{2}O + Cl_{2}$
The available chlorine may be defined as the $\%$ of chlorine liberated when one mole of bleaching powder $(127\, g)$ is treated with excess of dilute $H_2SO_4$.
P block elements are those in which the last electron enters any of the three p-orbitals of their respective shells. Since a p-subshell has three degenerate p-orbitals each of which can accommodate two electrons, therefore in all there are six groups of p-block elements.
P block elements are shiny and usually a good conductor of electricity and heat as they have a tendency to lose an electron. You will find some amazing properties of elements in a P-block element like gallium. It’s a metal that can melt in the palm of your hand. Silicon is also one of the most important metalloids of the p-block group as it is an important component of glass.