: CARBON COMPOUNDS (SECTION A)

SET 4 : CARBON COMPOUNDS (SECTION A)

1. Diagram 1.1 shows few series of chemical reactions of alcohol T with molecular formula C 3 H 8 O. Rajah 1.1 menunjukkan satu siri tindak balas kimia bagi alcohol T dengan formula molekul C 3 H 8 O.

Carbon dioxide + Water Karbon dioksida +

I Combustion Pembakaran

Alcohol T

Compound S

IV II Compound U

Alkohol T

Sebatian S Sebatian U

Dehydration

C 3 H 8 O + Compound V

Pendehidratan

Sebatian V

III acidified potassium dichromate (VI)solution

Larutan kalium dikromat(VI) berasid

Compound V Sebatian V

Diagram 1.1/ Rajah 1.1

(a) Draw the structural formula of alcohol T. Lukiskan formula struktur bagi alkohol T

[1 mark]

(b) Write the chemical equation for the complete combustion of alcohol T in conversion I Tuliskan persamaan kimia bagi pembakaran lengkap bagi alkohol T dalam perubahan I

………………………………………………………………………………………….................................. [1 mark]

(c) Compound U is a colourless liquid. Sebatian U ialah cecair yang tidak berwarna

(i) State a special characteristic of compound U . Nyatakan satu ciri istimewa bagi sebatian U

[1 mark]

(ii) Name the organic compound W that is required in reaction of conversion II Namakan sebatian organik W yang diperlukan dalam tindakbalas bagi perubahan II

……………………………………………………………………………………………………………. [1 mark]

(iii) Draw the structural formula of compound U. Lukiskan formula struktur bagi sebatian U.

[1 mark] (d) (i) Name the reaction in conversion III to produce compound V . Namakan tindakbalas dalam perubahan III untuk menghasilkan sebatian V.T

……………………………………………………………………………………………………………. [1 mark]

(ii) State an observation in the reaction of conversion III Nyatakan satu pemerhatian dalam tindak balas bagi perubahan III.

……………………………………………………………………………………………………………. [1 mark]

(iii) Write the chemical reaction for the reaction in conversion III Tuliskan persamaan kimia bagi tindak balas dalam perubahan III

……………………………………………………………………………………………………………. [1 mark] (e) Write the chemical equation for the reaction in conversion IV.

……………………………………………………………………………………………………………. [1 mark]

(f) Draw a labeled diagram to show the set-up of apparatus that can be used for conversion IV in laboratory.

Lukiskan gambar rajah berlabel untuk menunjukkan susunan radas yang digunakan untuk perubahan IV dalam makmal.

. [2 marks]

2. Diagram 2 shows a series of reactions involving compound Q with molecular formula C 2 H 6 O. Rajah 2 menunjukkan satu siri tindak balas melibatkan sebatian Q, dengan formula molekul C 2 H 6 O

Glucose

Compound W

Glukos

Sebatian W

VI

I Yeast / Yis

III Gas R Water +

II Compound Q, C 2 H 6 O

Gas P

Combustion/

Sebatian Q, C 2 H 6 O

Porcelain chips

Air

Pembakaran Serpihan porselin

IV Acidified potassium manganate(VII) solution Larutan kalium manganat(VII) berasid

Compound T Compound S, C 2 H 4 O 2 V Sebatian T Sebatian S, C 2 H 4 O 2 reflux with compound Q and conc. H 2 SO 4 refluks dengan sebatian Q dan H 2 SO 4 pekat

Diagram 2/ Rajah 2

(a) (i) State the name of reaction I. Nyatakan nama bagi tindak balas I

…………....………………………………………………………………………………. [1 mark]

(ii) Name of compound Q.

Namakan sebatian Q. …………………………………………………………………………..........……………

[1 mark]

(b) Write a chemical equation for the complete combustion of compound Q in reaction II. Tuliskan satu persamaan kimia bagi pembakaran lengkap sebatian Q dalam tindak balas II

…………………………………………………………………………………...…………… [2 marks]

(c) (i) State the name of gas R that is produced in reaction III. Nyatakan nama bagi gas R yang dihasilkan dalam tindak balas III.

……………………………………………………………………………....……………. [1 mark]

(ii) Gas R undergoes addition polymerisation to form polymer W in reaction VI. Draw the structural formula for polymer W. Gas R menjalankan pempolimeran tambahan dengan membentuk polimer W dalam tindak balas

VI. Lukiskan formula struktur bagi polimer W.

[1 mark]

(d) State the change of colour of acidified potassium manganate(VII) solution in reaction IV. Nyatakan perubahan warna bagi larutan kalium manganat(VII) berasid dalam tindakbalas IV.

[1 mark] (e) (i) State the name of compound T. Nyatakan nama bagi sebatian T

……………………………………………………………………………………………… [1 mark]

(ii) Write the chemical equation for reaction V

Tuliskan persamaan kimia bagi tindak balas V ………………………………………………………………………………………………

[2 marks]