✓ Board-verified
Science · 2023 · 5 marks
CBSE 2023 · Region 4 · Set 1 · Q34
(i)Draw the structure of the following compounds:(ii)How are structure (i) and structure (ii) given below related to one another? Give reason to justify your answer.
Structure (i) Structure (ii) Draw one more possible structure for above case.(iii)Differentiate between saturated and unsaturated carbon compounds on the basis of their general formula.(i)What happens when a small piece of sodium is dropped in ethanol? Write the equation for this reaction.(ii)Why is glacial acetic acid called so?(iii)What happens when ethanol is heated at $\displaystyle 443$ K in the presence of conc. $\displaystyle \mathrm{H}_{2} \mathrm{SO}_{4}$? Write the role of conc. $\displaystyle \mathrm{H}_{2} \mathrm{SO}_{4}$ in this case.(iv)Write an equation showing saponification.
(i)
Draw the structure of the following compounds:
(ii)
How are structure (i) and structure (ii) given below related to one another? Give reason to justify your answer.
Structure (i) Structure (ii) Draw one more possible structure for above case.
(iii)
Differentiate between saturated and unsaturated carbon compounds on the basis of their general formula.
(i)
What happens when a small piece of sodium is dropped in ethanol? Write the equation for this reaction.
(ii)
Why is glacial acetic acid called so?
(iii)
What happens when ethanol is heated at $\displaystyle 443$ K in the presence of conc. $\displaystyle \mathrm{H}_{2} \mathrm{SO}_{4}$? Write the role of conc. $\displaystyle \mathrm{H}_{2} \mathrm{SO}_{4}$ in this case.
(iv)
Write an equation showing saponification.
Marking-scheme solution
\(\displaystyle \frac{1}{2}\) $\displaystyle 1$
Hot Conc. \(\displaystyle \mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{OH} \xrightarrow[\mathrm{H}_{2} \mathrm{SO}_{4}]{ } \mathrm{CH}_{2}=\mathrm{CH}_{2}+\mathrm{H}_{2} \mathrm{O}\) Ethene - \(\displaystyle \mathrm{H}_{2} \mathrm{SO}_{4}\) - Dehydrating agent / removes water from Ethanol (iv) \(\displaystyle \mathrm{CH}_{3} \mathrm{COOCH}_{2} \mathrm{CH}_{3} \xrightarrow{\mathrm{NaOH}} \mathrm{CH}_{3} \mathrm{COO}^{-} \mathrm{Na}^{+}+\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{OH}\)
More from Carbon and its Compounds
- The number of single and double bonds present in a molecule of benzene (C 6 H 6) respectively, are:2024 · asked 3×
- Hydronium ions are formed by the reaction between:2023 · asked 3×
- (i) Give reason why carbon can neither form C^4+ cations nor C^4- anions but form covalent compounds. (ii)…2024 · asked 3×
- Assertion: Carbon and its compounds are our major sources of fuels. Reason (R): Most of the carbon compounds…2025 · asked 3×
- State the reason why (i) carbon compounds have low melting and boiling points. (ii) carbon compounds do not…2022 · asked 3×
- More than three million carbon compounds have been discovered in the field of chemistry. The diversity of…2024 · asked 3×
- Assertion: There are large number of compounds with many carbon atoms linked to each other. Reason (R):…2026 · asked 3×
- Attempt either or: (i) What is homologous series? Which two of the following organic compounds belong to the…2026 · asked 3×
CBSE Class 10 Science past-paper question from the 2023board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.