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This section is Section 2 of 3.
Speed as well as accuracy is important in this section. Work quickly, or you might not finish the paper. There are no penalties for incorrect responses, only marks for correct answers, so you should attempt all 27 questions. Each question is worth one mark.
You must complete the answers within the time limit. Calculators are NOT permitted.
Good Luck!
Note – if press “End Exam” you can access full worked solutions for all past paper questions
Which one of the following involves active transport?
The correct answer is D.
Element Y forms an ion Y 3- with the electronic configuration 2, 8, 8.
|
Group | Period |
A |
3 | 3 |
B |
3 |
4 |
C |
5 |
3 |
D |
5 |
4 |
E |
8 |
3 |
F |
8 |
4 |
The correct answer is C.
A radioactive isotope X decays into the stable isotope Y with a half-life of 20s.
The correct answer is B.
In the formula P = 2r²t
r = 3 x 10-³ t = 2.5 x 10⁴
The correct answer is D.
In mice the recessive form of a gene causes the death of the fetus if present in the homozygous state. Mice heterozygous for this gene were crossbred.
The correct answer is C.
Look at the equation for making chlorine gas and decide which answer will provide you with the numbers to balance it
aKMnO4 + bHCl aKCl + aMnCl2 + xH2O + yCl2
The correct answer is E.
The nth term of a sequence is .
The correct answer is B.
The diagram shows a crane that lifts a load with a mass of 100 kg at a constant speed of 0.4 m/s for 5 seconds. (g=10 N/kg)
Here are 3 statements about this activity:
1. The gain in gravitational potential energy of the load is 2000 J.
2. The tension in the cable at point P is 2000 N.
3. The load accelerates at 10 m/s2.
The correct answer is A.
The graph shows oxygen supply and demand in muscle cells during exercise.
The correct answer is D.
Which one of the following would not be formed by cracking the hydrocarbon C12H26?
The correct answer is C.
Here are four statements about radioactivity:
1. A beta particle is an electron that is emitted from the outermost electron shell of an atom.
2. A beta particle is emitted from the nucleus of the atom when a proton changes into an electron.
3. A beta particle is emitted from the nucleus of the atom when a neutron changes into an electron.
4. After a beta particle is emitted the mass number of the nucleus of the atom is unchanged.
The correct answer is D.
During the breakdown of a solution containing carbohydrates, proteins and lipids by carbohydrase, protease and lipase enzymes, the pH changed from neutral due to the products formed.
|
Carbohydrate | Protein | Lipid |
A | yes | yes |
yes |
B |
no | yes | no |
C | no | no |
yes |
D |
yes | yes | no |
E | no | yes |
yes |
The correct answer is E.
In the diagram below, the triangles are congruent, PQ is a continuation of NL and both L and P are equidistant from the line X = 0 and from the line Y = 0.
1. Reflection in the line y = 0
2. Rotation of 90º about the origin
3. Reflection in the line y = x
4. Reflection in the line x = 0
5. Rotation of 180º about the origin
The correct answer is D.
In the manufacture of hydrogen from methane and steam, carbon monoxide is produced as an unwanted side product. The amount of carbon monoxide is reduced by mixing the gases with steam when the following reversible reaction takes place.
CO (g) + H2O (g) ↔ CO2 (g) + H2 (g) ∆H negative (exothermic)
The correct answer is D.
A car is accelerated from rest along a horizontal road by a constant thrust force produced by the engine. The car eventually reaches a terminal speed, and the graphs below show the variation with time of three quantities (X, Y and Z) for the car:
|
X | Y | Z |
A |
acceleration | drag force | kinetic energy |
B | acceleration | mass |
weight |
C |
potential energy | velocity | kinetic energy |
D | potential energy | drag force |
weight |
E |
resultant force | mass | kinetic energy |
F | resultant force | velocity |
weight |
The correct answer is F.
A right-angled triangle is shown.
The correct answer is A.
The reflex arc enables the body to make rapid responses to certain stimuli.
The correct answer is B.
The general formula for the alkane series is CnH2n+2
The amide series has the same saturated structure as the alkanes but with one H substituted by the -CONH2 group.
The correct answer is F.
I stop while out walking and take the bearing of a windmill and note it as θ º. I then walk 5 km north and take the bearing again – it is now 2 θ.
The correct answer is C.
The diagram below shows three identical resistors and a battery that supplies a constant 12 V.
With the switch open, as shown, the current in resistor Y is 20 mA.
|
Current in | Potential |
X (mA) |
difference |
|
|
across Z (V) |
|
A |
13 ⅓ |
4 |
B |
13 ⅓ |
6 |
C |
20 |
4 |
D |
20 |
6 |
E |
30 |
4 |
F |
30 |
6 |
The correct answer is F.
The four statements are about the movement of blood during one complete circuit of the body.
1. Blood flowing from the lungs flows through the heart twice.
2. All the blood flowing from the lungs flows through the kidneys.
3. All the blood flowing from the liver flows through the lungs.
4. Only blood flowing from the digestive system flows through the liver.
The correct answer is B.
In addition to diamond and graphite, another allotrope of carbon is Buckminster fullerene, C60, which is in the shape of a sphere.
The correct answer is D.
A lorry of mass m, and travelling initially at speed v along a horizontal road, is brought to rest by an average braking force F in time t.
The correct answer is C.
A quadratic equation has solutions a and b.
a + b = -5 ab = 3
The correct answer is A.
Red-green colour blindness is a condition caused by a recessive allele. The gene is carried on the X chromosome.
The correct answer is D.
A sample of an alkali XOH of mass 2.8 g was dissolved in water.
This solution was neutralised by 12.5 cm3 of sulphuric acid of concentration 2.0 mol dm-3.
2 XOH (aq) + H2SO4 (aq) → X2SO4 (aq) + 2 H2O (l)
The correct answer is C.
Taking the speed of sound in air as 300 m/s and in steel as 4800 m/s. A worker lies next to a railway line and hears the whistle of a train through the steel rails and 1.5 s later hears the same whistle through the air.
The correct answer is C.
Below is a summary of your answers. You can review your questions in three (3) different ways.
The buttons in the lower right-hand corner correspond to these choices:
1. Review all of your questions and answers.
2. Review questions that are incomplete.
3. Review questions that are flagged for review. (Click the 'flag' icon to change the flag for review status.)
You may also click on a question number to link directly to its location in the exam.
This review section allows you to view the answers you made and see whether they were correct or not. Each question accessed from this screen has an 'Explain Answer' button in the top left hand side. By clicking on this you will obtain an explanation as to the correct answer.
At the bottom of this screen you can choose to 'Review All' answers, 'Review Incorrect' answers or 'Review Flagged' answers. Alternatively you can go to specific questions by opening up any of the sub-tests below.
TI-108
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