Write the structural formula of ethanol. What happens when it is heated with excess of conc. H 2 SO 4 at 443 K ? Write the chemical equation for the reaction stating the role of conc. H 2 SO 4 in this reaction.

The molecular formula of ethanol is CH 3 CH 2 OH . 100 % of this solution is known as absolute alcohol and 95 % of this solution in water is known as rectified spirit. The structural formula of ethanol is, When ethanol is heated with excess of concentrated H 2 SO 4 at 443 K , dehydration takes place and ethene is formed. The reaction involved in this process is given as follows: CH 2 CH 2 OH ( l ) ethanol + Conc . H 2 SO 4 ( l ) Sulphuric acid → Dehydration 443 K CH 2 = CH 2 ( g ) Ethene + H 2 O ( aq ) Water Concentrated H 2 SO 4 acts as the dehydrating agent in this reaction as it removes one water molecule from ethanol.

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Why is ethanoic acid sometimes referred to as a glacial acetic acid?

Important Questions on Carbon and Its Compounds

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10th CBSE

IMPORTANT

New Millenium Science - Chemistry Class X>Chapter 4 - Carbon and Its Compounds>PRACTICE QUESTIONS SET>Q 3

What type of fuels burn with a flame?

EASY

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IMPORTANT

New Millenium Science - Chemistry Class X>Chapter 4 - Carbon and Its Compounds>PRACTICE QUESTIONS SET>Q 4

An organic compound burns with a sooty flame. Is it a saturated or an unsaturated compound?

HARD

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New Millenium Science - Chemistry Class X>Chapter 4 - Carbon and Its Compounds>PRACTICE QUESTIONS SET>Q 5

On dropping a small piece of sodium in a test tube containing carbon compound 'X' with molecular formula

C_{2} H_{6} O

, a brisk effervescence is formed and a gas 'Y' is produced. On bringing a burning splinter at the mouth of the test tube, the gas evolved burns with a pop sound. Identify 'X' and Y'. Also, write the chemical equation for the reaction. Write the name and structure of the product formed, when you heat 'X' with excess conc. sulphuric acid.

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IMPORTANT

New Millenium Science - Chemistry Class X>Chapter 4 - Carbon and Its Compounds>PRACTICE QUESTIONS SET>Q 6

Write three different chemical reactions showing the conversion of ethanoic acid to sodium ethanoate. Write a balanced chemical equation in each case. Write the name of the reactants and the products other than ethanoic acid and sodium ethanoate in each case.

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New Millenium Science - Chemistry Class X>Chapter 4 - Carbon and Its Compounds>PRACTICE QUESTIONS SET>Q 7

Explain esterification reaction with the help of a chemical equation. Describe an activity to show esterification.

HARD

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IMPORTANT

New Millenium Science - Chemistry Class X>Chapter 4 - Carbon and Its Compounds>PRACTICE QUESTIONS SET>Q 8

Write the structural formula of ethanol. What happens when it is heated with excess of conc.

H_{2} {SO}_{4}

443 K

? Write the chemical equation for the reaction stating the role of conc.

H_{2} {SO}_{4}

in this reaction.

HARD

10th CBSE

IMPORTANT

New Millenium Science - Chemistry Class X>Chapter 4 - Carbon and Its Compounds>PRACTICE QUESTIONS SET>Q 9

An organic compound 'X' is a liquid at room temperature. It is also a very good solvent and has the molecular formula

C_{2} H_{6} O

. On oxidation 'X' gives 'Y' which give, brisk effervescence on reacting with

{NaHCO}_{3}

. X reacts with Y in the presence of conc.

H_{2} {SO}_{4}

to give another compound 'Z' which has a pleasant smell. Identify X, Y and Z. Also write chemical equations to show the formation of Y and Z.

HARD

10th CBSE

IMPORTANT

New Millenium Science - Chemistry Class X>Chapter 4 - Carbon and Its Compounds>PRACTICE QUESTIONS SET>Q 10

Give two examples of oxidation reactions.

Why is ethanoic acid sometimes referred to as a glacial acetic acid?

Important Questions on Carbon and Its Compounds

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