Same chapter3 marksDifficulty: Medium
Why must concentrated sulphuric acid always be added to water and never water to the acid?
Study of Compounds: Sulphuric Acid
1 markDifficulty: Medium
When concentrated sulphuric acid is added to sugar, the black mass left behind is:
- acarbon
- bcharcoal ash
- csulphur
- dcarbon dioxide
Original Khojo Papers practice question — not from a past board paper.
Answer
carbon
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
The acid removes hydrogen and oxygen from the sugar in the proportion in which they occur in water, leaving carbon behind.
Related questions
From the same topic and chapter, at a similar level.
Same chapter2 marksDifficulty: Medium
What is oleum and why is sulphur trioxide dissolved in sulphuric acid rather than in water?
Study of Compounds: Sulphuric Acid
Same chapter3 marksDifficulty: Medium
Describe the contact process for the manufacture of sulphuric acid, giving the equations and the catalyst used.
Study of Compounds: Sulphuric Acid
Same chapter3 marksDifficulty: Medium
Give two examples showing that concentrated sulphuric acid acts as a dehydrating agent.
Study of Compounds: Sulphuric Acid
Same chapter3 marksDifficulty: Medium
State one use of sulphuric acid in each of three different industries.
Study of Compounds: Sulphuric Acid
Same chapter3 marksDifficulty: Medium
Write equations to show sulphuric acid acting as (i) a dilute acid with zinc and (ii) an oxidising agent with copper.
Study of Compounds: Sulphuric Acid