Home
Class 12
CHEMISTRY
What is 'white, solid hard mass' called ...

What is 'white, solid hard mass' called as?

A

Talcum powder

B

Paris of Plaster

C

Plaster of Paris

D

Copper sulphate

Text Solution

AI Generated Solution

The correct Answer is:
To answer the question "What is 'white, solid hard mass' called as?", let's analyze the options provided and the relevant chemistry behind them. ### Step-by-Step Solution: 1. **Identify the Options**: The options given are: - Talcum powder - Paris of plaster - Plaster of Paris - Copper sulphate 2. **Understanding Plaster of Paris**: - Plaster of Paris is a white powder that is made from gypsum (calcium sulfate dihydrate). - The chemical formula for Plaster of Paris is \( \text{CaSO}_4 \cdot \frac{1}{2} \text{H}_2\text{O} \). 3. **Reaction with Water**: - When Plaster of Paris is mixed with water, it undergoes a chemical reaction to form gypsum: \[ \text{CaSO}_4 \cdot \frac{1}{2} \text{H}_2\text{O} + \text{H}_2\text{O} \rightarrow \text{CaSO}_4 \cdot 2\text{H}_2\text{O} \] - This reaction results in a hard solid mass known as gypsum, which is also white in color. 4. **Conclusion**: - Therefore, the 'white, solid hard mass' that is formed when Plaster of Paris is mixed with water is called gypsum. - However, if gypsum is not listed as an option, the closest correct answer would be Plaster of Paris itself, as it is the precursor to the hard mass. 5. **Final Answer**: The correct answer to the question is **Plaster of Paris**.
Promotional Banner

Similar Questions

Explore conceptually related problems

Two metals are melted and mixed together. The resulting mass is cooled to solidify. What is this solid called ?

What is the solid crust or the hard top layer of the earth called?

Novolac on heating with formaldehyde undergoes ___________ to form an infusible solid mass called ____________ .

Why is heat energy needed to melt a solid ? What is this heat energy called ?

Why is heat energy needed to melt a solid? What is this heat energy called ?

If green is called blue, blue is called white, white is called black and black is called green, what is the colour of the hair of a man? 1) black 2) white 3) green 4) Data inadequate 5) None of these

You are given a question and two statements. Identify which of the statements is/are necessary/sufficient to answer the question. Question: What is the colour of Jasmine? Statements: I. Blue is called white, white is called red and red is called yellow. II. Yellow is called purple, purple is called black, white is called brown and brown is called orange.

If water is called blue, blue is called red, red is called white, white is called sky, sky is called rain, rain is called green and green is called air, which .of the following is the colour of milk? 1) Air 2) Green 3) White 4) Sky 5) None of these

If cloud is called white, white is called rain, rain is called green, green is called air, air is called blue and blue is called water. where will the birds fly? 1) Air 2) Cloud 3) White 4) Blue 5) None of these