Question

Assertion: Chlorine reacts with freshly prepared calcium hydroxide to produce bleaching powder.
Reason: Chlorine has a great affinity for hydrogen.
(a) Both assertion and reason are correct and the reason is the correct explanation for assertion.
(b) Both assertion and reason are correct but the reason is not the correct explanation of assertion.
(c) Assertion is correct but the reason is incorrect
(d) Both assertion and reason are incorrect

Answer 1

Hint: Bleaching powder is a pale yellowish powder existing with a strong smell of chlorine. Its chemical formula is \[Ca{\left( {OCl} \right)_2}\] with its chemical name as Calcium hypochlorite. It is soluble in water but due to the presence of impurities, we never observe a clear solution.
Also, Chlorine is more reactive than hydrogen because it has high electronegativity and high electron affinity than hydrogen.

Complete answer: Assertion: Chlorine reacts with freshly prepared calcium hydroxide to produce bleaching powder.
Explanation- Chlorine reacts with calcium hydroxide to give a mixture of calcium hypochlorite (bleaching powder), calcium chloride and water.
\[2Ca{\left( {OH} \right)_2} + {\text{ }}2C{l_2} \to Ca{\left( {OCl} \right)_2} + CaC{l_2} + 2{H_2}O\]
Reason: Chlorine has a great affinity for hydrogen.
Explanation- Chlorine is highly electronegative. It has a very high affinity for hydrogen to such an extent that it reacts explosively with hydrogen, emitting heat and light in the process.
\[{H_2} + C{l_2} \to 2HCl\]
Although both these statements are two, the second statement does not explain the first statement.
Hence, both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.

ADDITIONAL INFORMATION: Calcium hypochlorite should not be stored wet and hot, or near any acid, organic materials, or metals. The unhydrated form is safer to handle.
Because of the great reactivity of chlorine, all chlorine in the Earth's crust is in the form of ionic chloride compounds, which includes table salt. It is the second-most abundant halogen (after fluorine) and twenty-first most abundant chemical element in Earth's crust. These crustal deposits are nevertheless dwarfed by the huge reserves of chloride in seawater.

Note:
\[Ca{\left( {OCl} \right)_2}\] is a strong oxidising agent, as it contains a hypochlorite ion at the valence \[ + 1\] (redox state: \[C{l^{ + 1}}\]). Calcium hypochlorite is an inorganic compound with formula \[Ca{\left( {OCl} \right)_2}\] . It is the main active ingredient of commercial products called bleaching powder.
Calcium hydroxide, with chemical formula \[Ca{\left( {OH} \right)_2}\], is also known as dry slaked lime.