Question:
Consider the following reaction:
\[ \text{Ca}_3\text{P}_2 \xrightarrow{\text{HCl}} \text{X} + \text{Y} \uparrow \]
Which of the following is not correct regarding Y?
Consider the following reaction:
\[ \text{Ca}_3\text{P}_2 \xrightarrow{\text{HCl}} \text{X} + \text{Y} \uparrow \]
Which of the following is not correct regarding Y?
Show Hint
Phosphine ($\text{PH}_3$) is a colorless, highly poisonous gas with a rotten fish smell.
Pure $\text{PH}_3$ is non-inflammable, but it becomes inflammable in the presence of impurities like $\text{P}_2\text{H}_4$ or $\text{P}_4$ vapors.
Pure $\text{PH}_3$ is non-inflammable, but it becomes inflammable in the presence of impurities like $\text{P}_2\text{H}_4$ or $\text{P}_4$ vapors.
Updated On: Jul 22, 2026
- Yellow colored gas with rotten fish smell
- Lewis base
- In aqueous solution it decomposes in presence of light
- Explodes in contact with traces of $\text{Cl}_2$ vapors
Show Solution
Verified By Collegedunia
The Correct Option is A
Solution and Explanation
Step 1: Understanding the Question:
The question is about the reaction of calcium phosphide ($\text{Ca}_3\text{P}_2$) with hydrochloric acid (HCl) and requires us to identify the incorrect statement about the gaseous product Y.
Step 2: Key Formula or Approach:
We must first write the balanced chemical equation for the reaction to identify gas Y.
Then, we evaluate the chemical and physical properties of Y against the given options.
Step 3: Detailed Explanation:
• The reaction of calcium phosphide with hydrochloric acid is:
\[ \text{Ca}_3\text{P}_2 + 6\text{HCl} \rightarrow 3\text{CaCl}_2 + 2\text{PH}_3 \uparrow \] Therefore, product X is Calcium chloride ($\text{CaCl}_2$), and Y is Phosphine gas ($\text{PH}_3$).
• Let us evaluate the statements regarding phosphine ($\text{PH}_3$):
• Statement (A): "Yellow colored gas with rotten fish smell"
Phosphine is a colorless gas, not a yellow-colored gas. It does have a characteristic rotten fish smell. Because it is described as yellow-colored, this statement is incorrect (which makes it the correct option to select).
• Statement (B): "Lewis base"
This statement is correct. The phosphorus atom in $\text{PH}_3$ has a lone pair of electrons ($\text{:PH}_3$), which it can donate, making it a weak Lewis base.
• Statement (C): "In aqueous solution it decomposes in presence of light"
This statement is correct. Aqueous solutions of $\text{PH}_3$ decompose in the presence of light to give red phosphorus and hydrogen gas.
• Statement (D): "Explodes in contact with traces of $\text{Cl}_2$ vapors"
This statement is correct. Phosphine is highly reactive and explodes when it comes into contact with oxidizing agents like $\text{Cl}_2$, $\text{HNO}_3$, or $\text{Br}_2$ vapors.
Step 4: Final Answer:
The incorrect statement is (A) because phosphine is a colorless gas.
The question is about the reaction of calcium phosphide ($\text{Ca}_3\text{P}_2$) with hydrochloric acid (HCl) and requires us to identify the incorrect statement about the gaseous product Y.
Step 2: Key Formula or Approach:
We must first write the balanced chemical equation for the reaction to identify gas Y.
Then, we evaluate the chemical and physical properties of Y against the given options.
Step 3: Detailed Explanation:
• The reaction of calcium phosphide with hydrochloric acid is:
\[ \text{Ca}_3\text{P}_2 + 6\text{HCl} \rightarrow 3\text{CaCl}_2 + 2\text{PH}_3 \uparrow \] Therefore, product X is Calcium chloride ($\text{CaCl}_2$), and Y is Phosphine gas ($\text{PH}_3$).
• Let us evaluate the statements regarding phosphine ($\text{PH}_3$):
• Statement (A): "Yellow colored gas with rotten fish smell"
Phosphine is a colorless gas, not a yellow-colored gas. It does have a characteristic rotten fish smell. Because it is described as yellow-colored, this statement is incorrect (which makes it the correct option to select).
• Statement (B): "Lewis base"
This statement is correct. The phosphorus atom in $\text{PH}_3$ has a lone pair of electrons ($\text{:PH}_3$), which it can donate, making it a weak Lewis base.
• Statement (C): "In aqueous solution it decomposes in presence of light"
This statement is correct. Aqueous solutions of $\text{PH}_3$ decompose in the presence of light to give red phosphorus and hydrogen gas.
• Statement (D): "Explodes in contact with traces of $\text{Cl}_2$ vapors"
This statement is correct. Phosphine is highly reactive and explodes when it comes into contact with oxidizing agents like $\text{Cl}_2$, $\text{HNO}_3$, or $\text{Br}_2$ vapors.
Step 4: Final Answer:
The incorrect statement is (A) because phosphine is a colorless gas.
Was this answer helpful?
0
0
Top AP EAPCET Chemistry Questions
- The four quantum numbers of the valence electron of potassium are :
- The volume of $0.02\, M$ acidified permanganate solution required for complete reaction of $60\, mL$ of $0.01\, MI^{-}$ ion solution to form $I_2$ in $mL$ is
- In which of the following the election gain enthalpy of elements is correctly arranged?
- The radii of $ \text{F,}{{\text{F}}^{-}}\text{O} $ and $ {{\text{O}}^{2-}} $ are in the order
- Which of the following has the highest first ionization potential?
View More Questions
Top AP EAPCET phosphorus Questions
- White phosphorus reacts with sulphuryl chloride and forms a solid substance A and a gas D. When A is heated at high temperature, it decomposes to give a colorless oily liquid 'X' and a gas C. The shape of X is:
- In the reaction of phosphorus with conc. \(HNO_3\), the oxidized and reduced products respectively are
- Observe the following reaction \[ \mathrm{PH_3(g)} \xrightarrow{\text{Light}} X+\mathrm{H_2} \] \[ \mathrm{PH_3(g)} \xrightarrow{300^\circ\mathrm{C}} X+\mathrm{H_2} \] Which of the following is NOT correct regarding \(X\)?
Top AP EAPCET Questions
- A body is projected from the ground at an angle of $\tan^{-1} \left( \frac{8}{7}\right)$ with the horizontal. The ratio of the maximum height attained by it to its range is
- The four quantum numbers of the valence electron of potassium are :
- A lens forms real and virtual images of an object, when the object is at $u_{1}$ and $u_{2}$ distances respectively. If the size of the virtual image is double that of the real image, then the focal length of the lens is (take, the magnification of the real image as $m$ )
- Two spheres $P$ and $Q$, each of mass $200\, g$ are attached to a string of length one metre as shown in the figure. The string and the spheres are then whirled in a horizontal circle about $O$ at a constant angular speed. The ratio of the tension in the string between $P$ and $Q$ to that of between $P$ and $O$ is $(P$ is at mid-point of the line joining $O$ and $Q$ )
- The volume of $0.02\, M$ acidified permanganate solution required for complete reaction of $60\, mL$ of $0.01\, MI^{-}$ ion solution to form $I_2$ in $mL$ is
View More Questions