Question:
X, Y, Z are calcium compounds. X is a primary raw material for manufacturing cement. Y is used to recover ammonia in Solvay process and Z is employed for making casts of statues. Identify the incorrect statement from the following:
X, Y, Z are calcium compounds. X is a primary raw material for manufacturing cement. Y is used to recover ammonia in Solvay process and Z is employed for making casts of statues. Identify the incorrect statement from the following:
Show Hint
CaCO$_3$ $\xrightarrow{\Delta}$ CaO $\xrightarrow{H_2O}$ Ca(OH)$_2$ is the correct sequence.
Updated On: Jun 10, 2026
- Y is prepared by adding water to X
- Y is also used as a starting material to manufacture bleaching powder
- Z is formed by heating gypsum at 373 K
- X with P$_4$O$_{10}$ forms calcium phosphate
Show Solution
Verified By Collegedunia
The Correct Option is A
Solution and Explanation
Concept:
This question is based on identification and interconversion of important calcium compounds such as limestone, lime, slaked lime, gypsum, and plaster of Paris.
Step 1: Identification of compounds
• X = CaCO$_3$ (limestone), used in cement manufacturing.
• Y = Ca(OH)$_2$ (slaked lime), used in Solvay process to recover NH$_3$.
• Z = CaSO$_4 \cdot \frac{1}{2}H_2O$ (Plaster of Paris), used for making casts.
Step 2: Checking each statement
• (A) Incorrect: Y (Ca(OH)$_2$) is NOT prepared by adding water to X (CaCO$_3$). It is prepared by adding water to CaO.
• (B) Correct: Ca(OH)$_2$ is used in bleaching powder preparation.
• (C) Correct: Gypsum heated at 373 K forms Plaster of Paris.
• (D) Correct: CaCO$_3$ reacts with P$_4$O$_{10}$ to form calcium phosphate.
Thus, statement (A) is incorrect.
Step 1: Identification of compounds
• X = CaCO$_3$ (limestone), used in cement manufacturing.
• Y = Ca(OH)$_2$ (slaked lime), used in Solvay process to recover NH$_3$.
• Z = CaSO$_4 \cdot \frac{1}{2}H_2O$ (Plaster of Paris), used for making casts.
Step 2: Checking each statement
• (A) Incorrect: Y (Ca(OH)$_2$) is NOT prepared by adding water to X (CaCO$_3$). It is prepared by adding water to CaO.
• (B) Correct: Ca(OH)$_2$ is used in bleaching powder preparation.
• (C) Correct: Gypsum heated at 373 K forms Plaster of Paris.
• (D) Correct: CaCO$_3$ reacts with P$_4$O$_{10}$ to form calcium phosphate.
Thus, statement (A) is incorrect.
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 GROUP 2 ELEMENTS Questions
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