chem monthly test.docx

7/28/2019 chem monthly test.docx

1/8PEPERIKSAAN DIAGNOSTIK AKADEMIK

BULAN MAC 2013 - PTSMI Page 1

Nama Pelajar : .

PUSAT TUISYEN SERI MINDA INTELEK

TAMAN MOUNT AUSTIN

PEPERIKSAAN DIAGNOSTIK AKADEMIK PERTAMA

(MAC 2013)

CHEMISTRY

FORM 5

2 HOUR

ARAHAN AM :-

1. Answer all questions.

2. This question paper consists of :-

SECTION A - OBJECTIVE - 10 MARKS

SECTION B - STRUCTURE - 20 MARKS

SECTION C - ESSAY - 30 MARKS


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PEPERIKSAAN DIAGNOSTIK AKADEMIK


SECTION A

10 MARKS

[You are advised to spend 20 minutes]

1. The following equation represents the reaction between calcium carbonate and hydrochloric acid.

Which of the following factors cannot increase the rate of reaction ?A. Decrease the size of calcium carbonate

B. Increase temperature of mixture

C. Increase the volume of hydrochloric acid

D. Increase the concentration of hydrochloric acid [trial-pahang-2012]

2. Which of the following is a role of catalyst to increase the rate of reaction ?

A. It increase the kinetic energy of reacting particle

B. It lowers the activation energy in reaction

C. It decrease the number of collision per second in the reaction

D. It increase the surface area of the reacting particle. [trial-pahang-2012]

3. Diagram 1 shows the apparatus for an experiment to determine the rate of reaction between

Sodium thiosulphate solution and sulphric acid.

Which of the following combination of conditions will make the mark X to disappear the fastest ?

[trial-pahang-2012]

4. Calcium carbonates reacts with acid to produce a salt, carbon dioxide and water. Which acid will

produce the highest rate of reaction ?

[trial-SBP-2012]


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5. Which of the following can be used to determine the rate of reaction ?

I Release of gas per unit time

II Change of colour intensity per unit time

III Formation of precipitate per unit

IV Increase the mass of reactant per unit time

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

[trial-terengganu-2012]

6. Which of the following factors does not affect rate of reaction ?

A. Volume of reactant B. Concentration of reactant

C. Temperature of reactant D. Size of solid reactant [trial-perak-2012]

7. Diagram 2 shows the structural formula of an organic compound

What is the IUPAC name for this compound ?

A. 2-pentene C. 2-metylbut-2-ene

B. 2-metylbut-1-ene D. 3-metylbut-2-ene [trial-terengganu-2012]

8. A compound has the formula CH3CH2CH=CH2

Which pair of type of compound and colour change when bromine water is added is correct ?

[trial-MRSM-2012]

9. Which of the following are NOT chemical properties of alkanes ?

A. Dissolve in organic solvents

B. Conduct electricity

C. low boiling point

D. less dence than water

10. Which is NOT correct for isomers of a compound ?

A. they differ in physical properties

B. they differ in chemical properties

C. they have same molecular formula

D. they have same structural formula

Type of compound Colour change

A Saturated Brown to colourlessB Saturated Colourless to brown

C Unsaturated Brown to colourless

D Unsaturated Colourless to brown


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SECTION B

20 MARKS


1. An experiment is conducted to determine the rate of reaction between 25 cm3 of hydrochloric acid 0.1 mol dm3 and10.0 g of marble chips. The gas evolved is collected into a burette by water displacement technique. Diagram 1shows the incomplete apparatus set-up for this experiment. Table 1 shows the result of the experiment.

[Relative atomic mass: Ca=40; C=12; 0=16. Molar volume of gas = 24 dm3 mol'' at room condition]

(a) Complete the diagram above with a suitable apparatus. [1 mark]

(b) Write the chemical equation for the reaction between hydrochloric acid and calcium carbonate. [1 mark]

.

(c ) Calculate the average rate of reaction in the first 50 seconds. [1 mark]

(d) (i) Plot a graph of volume of gas against time on the graph paper provided. [4 marks]

(ii) Calculate the rate of reaction at 100 seconds. [3 marks]


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2. A student carried out two experiments to investigate the effects of the factors influencing therate of reaction. Table 2 shows the results of the experiment.

Experiment Reactants Volume of gas collected in2 minutes (cm3)

I

2 g of granule calcium carbonate,CaCO3and 20 cm3 of 0.2 mol dm-3

hydrochloricacid, HCl

22.00

II

2 g of powdered calciumcarbonate,CaCO3 and 20 cm3 ofhydrochloric acid, HCl0.2 mol dm-3

37.00

(a) What is meant by rate of reaction? [1 mark]

.

(b) Calculate the average rate of reaction for Experiment I and Experiment II in cm3s-1 [2 marks]

(c) Sketch the graphs of the total volume of gas collected against time for Experiment I

and II on the same axes. [2 marks]

(d) With reference to the Collision Theory, compare and explain why there are differences inthe rates of reaction between Experiment I and Experiment II. [3 marks]...

...

...


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(e) Draw a labelled diagram of the set up of the apparatus for experiment I. [2 marks]


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SECTION C

30 MARKS


Question 1 [trial-melaka-2009]

Sodium thiosulphate solution reacts with an acid to produce a salt,

sulphur and a smelly gas, sulphur dioxide.

(a) Write an ionic equation to represent the reaction given in the box above [2 marks]

(b) Give two factors that can affect the rate of reaction stated above and state the respectiveeffects. [2 marks]

(c) You are given a conical flask, a piece of white paper and all other common apparatus found ina normal school laboratory.Describe, by writing the steps in detail, an experiment to prove the effect of one of the factorsthat you have given in (b).In your answer, you are required to show how the data obtained can be analysed to help youdraw a conclusion for your experiment.

[11 marks]

Question 2 [trial-perak-2009 & 2010]

(a) Octane and Octene are two examples of hydrocarbon. Octane is a saturated hydrocarbon

whereas octene is an unsaturated hydrocarbon.

(i) What is the meaning of hydrocarbon? [1 mark](ii) What is the difference between saturated hydrocarbon and unsaturated

hydrocarbon in terms of bonding? [2 marks](iii) Octane and octene are colourless liquids. Briefly describe a chemical test to

differentiate the two liquids.In your description, state the reagent used and the expected observations. [4 marks]

(b) Alkene X contains four carbon atoms and is able to show isomerism.

(i) Draw and name the structural formulae of two isomers of alkene X. [4 marks](ii) Unsaturated hydrocarbon can be converted into saturated hydrocarbon.

State the process and the condition needed Write the chemical equation involved. [4 marks]

- END OF QUESTION PAPER -

chem monthly test.docx

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