7/31/2019 set IV

1/6

Set IV

Section A

1. Which of the following organic compounds undergoes addition reaction?

A. Propane B. Propene C. Propan-1-ol D. Propanoic acidb

2. Which of the following is the chemical name for common salt?

A. Sodium sulphate B. Sodium carbonate C. Sodium chloride

D. Sodium bromide c

3. What is the systematic name for the following organic compound?

H H H H

HCC==CCCH

H H H

HCH

HCH

H

A. 2-ethylpent-2-ene B. 3-methylhex-3-ene

C. 3-methylhex-4-ene D. 4-ethylpen-2-ene b

4. A sequence of reactions involving ethene is as follows.

Reaction I Reaction II

C2H4 C2H5OH CH 3COOH

Which of the following represents Reaction I and Reaction II?

Reaction I Reaction II

A. Esterification Oxidation

B. Hydration Reduction

C. Dehydration Oxidation

D. Hydration Oxidation d

5. Isomers of an organic compound have similarI physical properties

II chemical properties

III structural formula

IV relative molecular mass

A. I and III only B. II and IV only C. I, II, and III only

D. II, III, and IV only b

6. Which of the following ions does not produce a white precipitate when sodium hydroxide solution is added in

excess?

I Zn 2+

II Al 3+

III Pb 2+

IV NH4+

7/31/2019 set IV

2/6

A. I and III only B. II and IV only C. I, II, and III only

D. I, II, III, and IV d

7. The figure below shows the cooling curve of acetamide.

temperature/oC

80

70

60

50

40

t1 t2 t3 t4 t5 time/s

Which of the following is the correct conclusion?

A. The melting point of acetamide is 80 oC

B. The volume of acetamide increases from t4 to t5.

C. Both solid and liquid exist between t2 and t4.

D. Heat is absorbed from the surrounding between t1 and t2. c

8.

X is a mono atomic inert gas The electron configuration of Y is 2.8.8

Which of the following statements is true?

A. X and Y have octet electron configuration

B. X and Y can form a covalent bond C. Size of X is bigger than that of Y

D. Y is more reactive than X. a

9. The electron configuration of two elements are shown below.

Element Electron configuration

J 2.8.2

Z 2.8.7

Which of the following formula and the type of bonding of the compound formed between J and Z?

Formula Type of bond

A. JZ ionic

B. J2Z covalent

C. JZ2 ionic

D. JZ2 covalent c

7/31/2019 set IV

3/6

10. A chemical equation is shown below.

2R + CuSO4 R2SO4 + CuWhat is the volume of copper(II) sulphate 1 mol dm 3 that is required to react completely 1.95 g of R? [relative

atomic mass: R = 39]

A. 25 cm 3 B. 30 cm 3 C. 35 cm 3 D. 40 cm 3 a

11. An electrolytic cell is shown below.

ammeter

carbon electrodes

Glacial ethanoic acid

Which of the following would result in a flow of current through the electrolyte?

A. Tetrachoromethane is added to the glacial ethanoic acid

B. The carbon electrodes are moved closer to each other

C. Water is added to the glacial ethanoic acid D. A more powerful battery is used. c

12. The figure below shows a syringe containing X g of sulphur dioxide at room temperature and pressure.

X g of sulphur dioxide

20 40 60 80 100 120

Which of the following values represent X? [relative atomic mass: S = 32; O = 16; 1 mol of gas occupies 24 dm 3 at

room temperature and pressure.]

A. 0.32 g B. 0.64 g C. 0.96 g D. 1.28 g a

13. The proton numbers of two elements R and J are shown below.

Element Proton number

R 19

J 8

7/31/2019 set IV

4/6

What is the relative molecular mass of the compound formed between R and J?

[relative atomic mass: R = 39 ; J = 16]

A. 55 B. 71 C. 94 D. 110 c

14. Some information on particles P, Q, R, and S is shown below.

Particle Proton number Nucleon number Number of electrons

P 12 24 10

Q 12 24 12

R 17 35 17

S 17 37 17

Based on the above information, which of the following statements is true?

I P is positively charged

II R and S are isotopes of the same element

III Q reacts with S to form an ionic compound

IV Q is a neutral particle

A. I and III only B. II and IV only C. I, II, and III onlyD. I, II, III, and IV d

15. Which of the following shows that iron is a transition metal?

I Iron(II) hydroxide is green in colour

II Iron forms two chlorides, iron(II) chloride and iron(III) chloride

III Iron(II) oxide is soluble in dilute hydrochloric acid

IV A compound containing iron is potassium hexacyanoferrate(IV)

A. I and III only B. II and IV only C. I, II, and IV only

D. I, II, III, and IV c

Section B

1. The table below shows the proton number of a few elements.

Element Sodium Magnesium Aluminium Sulphur Chlorine

Protonnumber

11 12 13 16 17

Based on the above table, answer the following questions.

(a) Name (i) a metal and a non metal. [1]

(b) Name (i) the group which chlorine belong in the Periodic Table. [1]

(ii) another element in the same group as chlorine. [1]

(c) Write the electron configuration of sulphur. [1]

(d) (i) Arrangement the elements in order of increasing atomic size. [1]

(ii) Explain your answer in (d) (i) above. [1]

(e) In a simple experiment, magnesium ribbon is burnt in excess of chlorine.

(i) State one observation obtained. [1]

(ii) Write an equation for the reaction occurred. [1]

(iii) State one physical of the product formed above. [1]

(f) State the period of the elements in the above table. [1]

2.

7/31/2019 set IV

5/6

ammeter

Carbon electrode X carbon electrode Y

U-tube

concentrated

copper(II)

chloride

The electrolysis of concentrated copper(II) chloride solution using carbon electrodes is shown above.

(a) (i) Write the formulae of all ions present in concentrated copper(II) chloride solution. [1]

(ii) Explain why copper(II) chloride solution conducts electricity. [1]

(b) State the observation at

(i) electrode X

(ii) electrode Y [2]

(c) (i) Write the equation for the half-reaction at

(i) electrode X

(ii) electrode Y [2]

(d) Some product at electrode X is collected and passed into an aqueous solution of potassium iodide, a chemical

reaction takes place.

(i) Name the product formed. [1]

(ii) Name the type of reaction occurred. [1]

(iii) Write an equation to represent the chemical reaction occurred. [1]

(e) If both the carbon electrodes are replaced by copper electrodes, explain what happens to electrode X.

[1]

Section C

6. (a) With the aid of a labeled diagram, describe how you would electroplate an iron key with silver. State the

materials required and any precautions taken. [8]

7/31/2019 set IV

6/6

(b) The figure below shows the arrangement of a simple chemical cell to measure the potential difference between two

different metals.

voltmeter

Metal electrode Metal electrode

U-tube

electrolyte

The potential difference between two metals is shown in the following table.

Pairs of metal electrodes Potential difference /V Negative terminal

Copper and zinc

zinc and magnesium

silver and copper

1.10

2.90

0.46

zinc

magnesium

copper

(i) Arrange the metals copper, zinc, magnesium and silver in descending order of the tendency to donate electrons.

Explain your answer. [6]

(ii) If a chemical cell is set up by using silver and zinc and the same electrolyte, what would be the potential

difference? Name the negative electrode. [2]

(c) The symbol of an element X is shown below.

37

X17

Describe how element X can react with sodium. [4]