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MODEL PAPER - 8 [2026] — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceMODEL PAPER - 8 [2026]5 Marks
Question
i. Name a commercially important carbon compound having functional group - OH and write its molecular formula.
ii. Write chemical equation to show its reaction with
1. Sodium metal
2. Excess conc. sulphuric acid
3. Ethanoic acid in the presence of an acid catalyst
4. Acidified potassium dichromate
iii. Also write the name of the product formed in each case.
✓

Answer

i. Ethanol - $\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH}$
ii. 1. $2 C_2 H_5 OH+2 Na \rightarrow \underset {\text{Sodium Ethoxide}}{2 C_2 H_5 ONa}+H_2$
2. $C _2 H _5 OH \xrightarrow{\text { Excess Conc. } H _2 SO _4, 443 K} CH _2= CH _2+ H _2 O$
3. $C _2 H _5 OH + CH _3 COOH \xrightarrow{\text { Acid Catalyst }} CH _3 COOC _2 H _5+ H _2 O$
4. $C _2 H _5 OH \xrightarrow{\text { Acid field } K _2 Cr _2 O _7} \underset{\text { Ethanoic acid }}{ CH _3 COOH }$
iii. 1. Sodium ethaxide
2. Ethene
3. Ester
3. Ester

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