ICSE Class 10 Chemistry 2023 Solved Paper

Differentiate between the following pairs based on the criteria given in the brackets:

Question : 81

Total: 88

Cane sugar and hydrated copper sulphate [using concentrated H2SO4 ]

Solution:

When conc. H2SO4 is poured on the cane sugar, acid acts as dehydrating agent which removes moisture from sugar and sugar turns into spongy mass of carbon called sugar charcoal.
When conc. H2SO4 is added to CuSO4 . 5H2O , acid acts as dehydrating agent, which removes crystalline water. The salt converted into anhydrous salt which has white.
‌

CuSO4.5H2O

‌ Blue ‌

conc.

─────▸

H2SO4

CuSO4

‌ White. ‌

+5H2O

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