Identify the compounds A , B and C in the following reaction sequence : (a) CH 3 CH 2 OH → dil . HCl KMnO 4 / KOH A + H 2 O (b) CH 3 CH 2 OH + A → Conc . H 2 SO 4 B + H 2 O (c) B + NaOH → C + CH 3 CH 2 OH

(a) Ethanol on oxidation with a strong oxidising agent gets converted to ethanoic acid. CH 3 CH 2 OH → dil . HCl KMnO 4 / KOH CH 3 COOH + H 2 O (b) Ethanol on reaction with ethanoic acid gets converted to ethyl ethanoate. CH 3 CH 2 OH + CH 3 COOH → Conc . H 2 SO 4 CH 3 COOC 2 H 5 + H 2 O (c) Ethyl ethanoate on reaction with sodium hydroxide gets converted to sodium ethanoate. CH 3 COOC 2 H 5 + NaOH → CH 3 COONa + CH 3 CH 2 OH Therefore ' A ' is ethanoic acid CH 3 COOH , ' B ' is ethyl ethanoate CH 3 COOC 2 H 5 and ' C ' is sodium ethanoate CH 3 COONa .

E M B I B E

New Millenium Science - Chemistry Class X>Chapter 4 - Carbon and Its Compounds>SELF-EVALUATION TEST>Q 3

MEDIUM

10th CBSE

IMPORTANT

Earn 100

Illustrate the formation of nitrogen molecule using an electron dot diagram.

Important Questions on Carbon and Its Compounds

HARD

10th CBSE

IMPORTANT

New Millenium Science - Chemistry Class X>Chapter 4 - Carbon and Its Compounds>SELF-EVALUATION TEST>Q 4

Atomic numbers of three elements X, Y and Z are

11

,

16

and

15

respectively.
(a) Write down the molecular formula of the compound formed by elements ‘X’ and ‘Y’.
(b) Explain the bonding of other compounds formed.

HARD

10th CBSE

IMPORTANT

New Millenium Science - Chemistry Class X>Chapter 4 - Carbon and Its Compounds>SELF-EVALUATION TEST>Q 4

Draw the possible isomers of the compound with molecular formula

C_{3} H_{6} O

and also give their electron dot structures.

MEDIUM

10th CBSE

IMPORTANT

New Millenium Science - Chemistry Class X>Chapter 4 - Carbon and Its Compounds>SELF-EVALUATION TEST>Q 5

Explain the saponification with the help of a suitable chemical equation.

MEDIUM

10th CBSE

IMPORTANT

New Millenium Science - Chemistry Class X>Chapter 4 - Carbon and Its Compounds>SELF-EVALUATION TEST>Q 5

Explain the esterification with help of a suitable chemical equation.

.

HARD

10th CBSE

IMPORTANT

New Millenium Science - Chemistry Class X>Chapter 4 - Carbon and Its Compounds>SELF-EVALUATION TEST>Q 6

A neutral organic compound X with molecular formula

C_{2} H_{6} O

, on oxidation with potassium dichromate and sulphuric acid gives an acidic compound Y. The compound X on warming with Y in presence of concentrated sulphuric acid gives a sweet smelling substance Z. Identify X, Y and Z.

HARD

10th CBSE

IMPORTANT

New Millenium Science - Chemistry Class X>Chapter 4 - Carbon and Its Compounds>SELF-EVALUATION TEST>Q 7

Soaps and detergents are both type of salts. State the difference between the two. Write the mechanism of the cleansing action of soaps. Why do soaps not form lather (foam) with hard water? Mention any two problems that arise due to use of detergents instead of soaps.

HARD

10th CBSE

IMPORTANT

New Millenium Science - Chemistry Class X>Chapter 4 - Carbon and Its Compounds>SELF-EVALUATION TEST>Q 8

Identify the compounds $A$ , $B$ and $C$ in the following reaction sequence :

(a) ${CH}_{3} {CH}_{2} OH \to_{dil . HCl}^{{KMnO}_{4} / KOH} A + H_{2} O$