Question
Give two examples of thermal decomposition.
✓
Answer
(1) At high temperature, calcium carbonate decomposes into calcium oxide and carbon dioxide.
(2) At high temperature sugar decomposes into black mass of carbon and water vapour.
(2) At high temperature sugar decomposes into black mass of carbon and water vapour.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
| Plant/Microbes | Functions |
| (1) Pteris vitata | ______________________ |
| (2) Pseudomonas | ______________________ |
| (3) ________________ | Absorption of uranium and arsenic |
| (4) ________________ | Absorption of radiations of nuclear waste |
What is meant by a combination reaction?
OR
Define: combination reaction.
OR
Define: combination reaction.
Why does the eye-lens not have to do all the work of converging incoming light rays?
Explain the terms: Metallurgy
Why does the sky appear blue on a clear day?
What are the appliances that work on the principle of heating effect of electric current?
Explain the following reactions giving their balanced chemical equations: Sugar is heated.
| Column I | Column II |
| (1) Cyclohexane | (a) $\mathrm{CH}_3 \mathrm{COOH}$ |
| (2) Methanol | (b) $\mathrm{CH}_3 \mathrm{Cl}$ |
| (3) Acetaldehyde | (c) $\mathrm{CH}_2 \mathrm{Cl}_2$ |
| (4) Ethanoic acid | (d) $\mathrm{CH}_3 \mathrm{OH}$ |
| (e) $\mathrm{C}_6 \mathrm{H}_{12}$ | |
| (f) $\mathrm{CH}_3 \mathrm{CHO}$ |
Five persons A, B, C, D and E have diabetes, leukaemia, asthma, meningitis and hepatitis, respectively.
- Which of these persons can donate eyes?
- Which of these persons cannot donate eyes?
write the molecular formulae of oxides of the following elements by referring to the Mendeleev’s periodic table. Na, Si, C, Rb, P, Ba, Cl, Sn.