Question:
On heating with concentrated $NaOH$ solution in an inert atmosphere of $CO_2$ white phosphorous gives a gas. Which of the following statement is incorrect about the gas ?
On heating with concentrated $NaOH$ solution in an inert atmosphere of $CO_2$ white phosphorous gives a gas. Which of the following statement is incorrect about the gas ?
Updated On: Apr 13, 2024
- It is less basic than $NH _3$
- It is more basic than $NH_3$
- It is highly poisonous and has smell like rotten fish.
- It's solution in water decomposes in the presence of light
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The Correct Option is B
Solution and Explanation
$\underset{\text{white}}{{P_4}}+3znaOH \to \underset{\text{Phosphine }}{{PH_3}}+\underset{\text{Sodium hypophosphite}}{{3NaH_2PO_2}}$
Phosphine is a colourless gas with rotten fish smell and is highly poisonous. Its solution in water decomposes in the presence of light.
Phosphine is weakly basic. So Statement (II) is incorrect.
It is less basic than $NH _{3}$.
Phosphine is a colourless gas with rotten fish smell and is highly poisonous. Its solution in water decomposes in the presence of light.
Phosphine is weakly basic. So Statement (II) is incorrect.
It is less basic than $NH _{3}$.
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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.
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- Group 16 Elements: Oxygen family
- Group 17 Elements: Fluorine family
- Group 18 Elements: Neon family