Question:
An amorphous solid $(X)$ burns in air to form a gas $(Y)$ which turns lime water milky. This gas decolourises aqueous solution of acidified $KMnO_4$. Gas $(Y)$ reacts with oxygen to give another gas $(Z)$ which is responsible for acid rain. $X$, $Y$ and $Z$ are
An amorphous solid $(X)$ burns in air to form a gas $(Y)$ which turns lime water milky. This gas decolourises aqueous solution of acidified $KMnO_4$. Gas $(Y)$ reacts with oxygen to give another gas $(Z)$ which is responsible for acid rain. $X$, $Y$ and $Z$ are
Updated On: Jul 6, 2022
- a
- b
- c
- d
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The Correct Option is B
Solution and Explanation
$\underset{\text{(X)}}{ {S}} {+ \,O2 ->}$ $\underset{\text{(Y)}}{ {SO2}}$
$\underset{\text{(Y)}}{ {SO2}}+ {Ca(OH)2 ->}$$\underset{\text{white ppt.}}{ {CaSO3 v}}+ {H2O}$
$\underset{\text{Purple}}{ {2KMnO4}}+$$\underset{\text{(Y)}}{ {5SO2}}+$$ {2H2O \to K2SO4 +}$$\underset{\text{Colourless}}{ {2MnSO4}}+ {2H2SO4}$
$\underset{\text{(Y)}}{ {2SO2}}+ {O2 ->}$ $\underset{\text{(Z)}}{ {2SO3}}$
$\underset{\text{(Z)}}{ {SO_3}}$$ {+\,H2O \to H2SO4}$ (responsible for acid rain)
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Concepts Used:
P-Block Elements
- 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.
P block elements consist of:
- Group 13 Elements: Boron family
- Group 14 Elements: Carbon family
- Group 15 Elements: Nitrogen family
- Group 16 Elements: Oxygen family
- Group 17 Elements: Fluorine family
- Group 18 Elements: Neon family