✓ Board-verified
Science · 2024 · 3 marks
CBSE 2024 · Region 1 · Set 3 · Q32
A compound which is prepared from gypsum has the property of hardening when water is mixed in right quantity with it :(i)Write common name and the chemical name of this compound.(ii)Give chemical equation for its preparation.(iii)List its two uses.
A compound which is prepared from gypsum has the property of hardening when water is mixed in right quantity with it :
(i)
Write common name and the chemical name of this compound.
(ii)
Give chemical equation for its preparation.
(iii)
List its two uses.
Marking-scheme solution
(i) Plaster of Paris ; Calcium Sulphate hemihydrate
(ii)
\[\mathrm{CaSO}_{4} \cdot 2 \mathrm{H}_{2} \mathrm{O} \xrightarrow{373 \mathrm{~K}} \mathrm{CaSO}_{4} \cdot \frac{1}{2} \mathrm{H}_{2} \mathrm{O}+1 \frac{1}{2} \mathrm{H}_{2} \mathrm{O}
\]
(iii)
Two uses :
More from Acids, Bases and Salts
- Assertion: Concentrated nitric acid is diluted by adding water slowly to acid with constant stirring. Reason…2025 · asked 3×
- An aqueous solution turns red litmus blue. Excess addition of which of the following solution would reverse…2026 · asked 3×
- (i) A compound 'X' which is prepared from gypsum has the property of hardening when mixed with proper…2023 · asked 3×
- Which of the given option represents a family of salts?2025 · asked 3×
- Select a pair of natural indicator from the following:2024 · asked 3×
- In order to prepare dry hydrogen chloride gas in humid atmosphere the gas produced is passed through a guard…2025 · asked 3×
- Acid-base indicators can be used to distinguish between an acid and a base. Universal indicator, a mixture of…2025 · asked 3×
- Consider the following reactions: (i) Dilute hydrochloric acid reacts with sodium hydroxide. (ii) Magnesium…2025 · asked 3×
CBSE Class 10 Science past-paper question from the 2024board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.