EASE 4 CHEMISTRY GRADE 10 2023/2024 (SAMPLE)
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Question
Which statement about polymers is correct?
A) Addition polymers are all biodegradable.
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B) Condensation polymers can all be hydrolysed to give amino acids.
C) Condensation polymers only exist in nature.
D) Forming addition polymers produces only one product.
How is the end-point of a titration typically identified using an indicator?
A)
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The end-point is reached when the reaction mixture changes color, and the indicator's color matches the original color of the
reactants.
B) The end-point is determined when the reaction rate is maximum, indicating that the reaction has gone to completion.
C) The end-point is achieved when the volume of the titrant added is equal to the volume of the analyte in the solution.
D)
The end-point is signaled by a sudden and distinct change in color of the solution, as detected by the indicator, marking the
completion of the reaction.
Four substances are listed.
1. carbohydrate
2. ethanol
3. protein
4. sodium chloride
Which substances are natural polymers?
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A) 1 and 2
B) 1 and 3
C) 2 and 4
D) 3 and 4
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A student wants to investigate the rate of reaction between marble chips and hydrochloric acid by measuring the volume of carbon dioxide
produced with different concentrations of acid.
The equation for the reaction is as follows:
Which of the following lists of equipment can she use to measure the volume of the gas produced?
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A) Gas syringe, cotton wool, bung, delivery tube
B) Gas syringe, conical flask, bung, delivery tube
C) Gas syringe, beaker, bung, balance
D) Balloon, conical flask, stopper, balance
In some oil refineries, naphtha is heated with steam at 800
shown below.
Which two of these hydrocarbons are unsaturated?
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A) A and C
B) B and C
C) B and D
D) C and E
. A mixture of hydrocarbons is formed. Some of these hydrocarbons are
The diagram shows three repeat units in the sturcture of an addition polymer.
Which alkene monomer is used to make this polymer?
A)
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B)
C)
D)
Which of the following statements is correct about testing metal cations with flame?
A)
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B)
Lithium - Crimson/Red
Sodium - Yellow
Potassium - Lilac
Calcium - Red
Barium - Green
Copper - Blue green
Little Criminals.
Nasty Youths,
Kick Little,
Cats Round
Back Garden
C)
D)
What distinguishes addition polymerization from condensation polymerisation?
A) Addition polymerisation involves the elimination of small molecules like water, while condensation polymerisation does not.
B)
In addition polymerisation, monomers combine with the release of a by-product, while condensation polymerisation leads to the
formation of a by-product without the combination of monomers
C)
In addition polymerisation, the polymer chain grows by adding monomers without the release of any by-product, whereas
condensation polymerisation involves the release of a by-product, such as water or alcohol, during the polymerisation process.
D)
Addition polymerisation requires the presence of a catalyst, while condensation polymerisation proceeds spontaneously without the
need for a catalyst.
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Which of the following statements accurately describes the formation of poly(ethene) as an example of addition polymerisation using
ethene monomers?
A) Poly(ethene) is formed through condensation polymerisation by combining ethene monomers with the release of water.
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B)
Poly(ethene) is produced via addition polymerisation, where ethene monomers react to form a polymer with the release of a small
molecule like water.
C)
Poly(ethene) results from the addition polymerisation of ethene monomers, with no by-product released during the polymerisation
process.
D) Poly(ethene) is obtained by the condensation of ethene monomers, leading to the elimination of a small molecule like water.
Which statement about the names of organic compounds is correct?
A) Compounds containing C=C double bonds are alkanes.
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B) The compound of formula CH3CO2H is methanoic acid
C) The compound of formula C2H4 is ethane.
D) The compound of formula C2H5OH is an alcohol.
The hydrocarbon propane is an important constituent of liquefied petroleum gas (LPG).
Which is the correct equation of burning propane in an excess of air?
A)
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B)
C)
D)
Which one of the following that is isomer of 2-methyl butane?
A) Pentane
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B) Pentene
C) 2-pentene
D) propane
Mainly polymerization is classified into addition and condensation polymerization.
Which one of the following is true about addition and condensation polymerization?
A) Poly vynil chloride is example of addition polymerization
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B) In additon polymerization, there is a side product which is water
C) Cellulose is example of addition polymerization
D) In condensation polymerization, the monomers must have double or triple bond
PP, or phenolphtalein is one of the most common indicator used during titration process.
Which one of the following statements are CORRECT explaining the color change occurs during titration using PP as the indicator?
A) Pink - Base condition; Colorless - Acidic condition
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B) Green - Base condition; Pink - Acidic condition
C) Yellow - Base condition; Red - Acidic condition
D) Colorless - Base condition; Blue - Acidic condition
Esterification is a reaction between two different organic compounds, producing ester and another byproduct.
Which of the following is the correct general chemical equation of esterification?
A) Alkane + Alcohol → Ester
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B) Alcohol + Carboxylic acid → Ester + Water
C) Carboxylic acid + Water → Ester + Alcohol
D) Alcohol + Alkene → Ester + Alkane
An unknown white powder is to be identified using a flame test. When the powder is exposed to flame, the flame becomes green.
What is the cation present in the white powder?
A) Sodium (Na)
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B) Potassium (K)
C) Calcium (Ca)
D) Barium (Ba)
The diagram shows a molecule of an organic compound W.
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Which statement is NOT correct?
A) A solution of W in water has a pH greater than pH 7.
B) A solution of W in water reacts with sodium hydroxide solution.
C) When copper(II) carbonate is added to a solution of W in water, a gas is produced.
D) When magnesium is added to a solution of W in water, a gas is produced.
Which reaction would result in the production of a gas that would produce a squeaky pop with a lit splint?
A) Iron(II) oxide + sulfuric acid
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B) Methane + oxygen during complete combustion
C) Magnesium + hydrochloric acid
D) Carbon dioxide and water in the presence of light and chlorophyll
Which of the following structures shows a compound that belongs to a different homologous series to octane?
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A) A
B) B
C) C
D) D
Which type of covalent bond is found in both a molecule of methane and a molecule of ethane?
A) A double bond between a carbon atom and a hydrogen atom
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B) A double bond between two carbon atoms
C) A single bond between a carbon atom and a hydrogen atom
D) A single bond between two carbon atoms
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