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Question 1:

Topic – B6.1 (Photosynthesis)

What do plants need for their nutrition?
(A) carbon dioxide, ions, organic compounds and light
(B) carbon dioxide, ions, organic compounds and water
(C) carbon dioxide, ions, light and water
(D) carbon dioxide, organic compounds, light and water

▶️Answer/Explanation

Ans: C

Question 2:

Topic – B3.2 (Osmosis)

The photograph shows red onion cells placed in a concentrated salt solution.

Which statement explains their appearance?
(A) Water has moved into the cells against a water potential gradient.
(B) Water has moved out of the cells down a water potential gradient.
(C) Water has moved out of the cells against a water potential gradient.
(D) Water has moved into the cells down a water potential gradient.

▶️Answer/Explanation

Ans: B

Question 3:

Topic – B4.1 (Biological molecules)

Glycerol is a component of which large molecules?
(A) fats
(B) glycogen
(C) proteins
(D) starch

▶️Answer/Explanation

Ans: A

Question 4:

Topic – B5.1 (Enzymes)

The graph shows the rate of reaction of salivary amylase at different temperatures.

What does the graph show at point X?
(A) The enzyme has stopped working.
(B) The reaction is nearly completed.
(C) The reaction rate is controlled by pH.
(D) The temperature is higher than the optimum.

▶️Answer/Explanation

Ans: D

Question 5:

Topic – B6.2 (Leaf structure)

The diagram shows a section of a dicotyledonous leaf.
Which layer is the spongy mesophyll?

▶️Answer/Explanation

Ans: C

Question 6:

Topic – B7.1 (Diet)

The condition kwashiorkor is characterised by a poor growth rate, swelling of the hands and feet, and a bulging stomach.
Which component of a balanced diet is lacking in someone with kwashiorkor?
(A) fibre
(B) protein
(C) iron
(D) vitamin D

▶️Answer/Explanation

Ans: B

Question 7:

Topic – B9.2 (Heart)

Which sequence is correct for part of the blood flow pathway in a mammal?
(A) heart → pulmonary artery → lungs → pulmonary vein
(B) heart → pulmonary vein → lungs → vena cava
(C) lungs → pulmonary artery → heart → pulmonary vein
(D) lungs → pulmonary vein → heart → pulmonary artery

▶️Answer/Explanation

Ans: A

Question 8:

Topic – B11.1 (Gas exchange in humans)

An athlete is running 1000 m.
Which graph shows the changes in their breathing rate and the concentration of carbon dioxide in their vena cava during the run?

▶️Answer/Explanation

Ans: C

Question 9:

Topic – B13.3 (Homeostasis)

The graph shows the variation of body temperature over time of a healthy person at rest.

How will the body reverse the temperature change shown between times X and Y?
(A) decreased breathing rate
(B) decreased pulse rate
(C) shivering
(D) sweating

▶️Answer/Explanation

Ans: D

Question 10:

Topic – B15.1 (Asexual reproduction)

What are the advantages of a plant reproducing asexually?
1 increased variety of genetic material
2 only small flowers need to be produced
3 rapid increase in population size
(A) 1 only

(B) 2 only

(D) 1, 2 and 3

▶️Answer/Explanation

Ans: C

Question 11:

Topic – B16.1 (Chromosomes and genes)

The diagram shows a nucleus from a cell of an organism. The structures shown within the nucleus are chromosomes.

Why is the nucleus haploid?
(A) because each chromosome contains only one copy of the DNA
(B) because there are only four chromosomes
(C) because there are two sets of chromosomes
(D) because there is a single set of unpaired chromosomes

▶️Answer/Explanation

Ans: D

Question 12:

Topic – B18.2 (Food chains and food webs)

What is a carnivore?
(A) an organism that gets its energy by eating animals
(B) an organism that gets its energy by eating plants
(C) an organism that gets its energy from dead matter
(D) an organism that makes its own organic matter

▶️Answer/Explanation

Ans: A

Question 13:

Topic – B19.1 (Habitat destruction)

What is an undesirable effect of deforestation?
(A) It increases the oxygen concentration of the atmosphere.
(B) It leads to erosion and loss of soil.
(C) It makes land available for agriculture.
(D) It pollutes the air with methane.

▶️Answer/Explanation

Ans: B

Question 14:

Topic – C1.1 (Solids, liquids, and gases)

In which substance are the particles closest together at room temperature?
(A) CO$_{2}$

(B) Ne

(D) Zn

▶️Answer/Explanation

Ans: D

Question 15:

Topic – C2.3 (Isotopes)

How many neutrons are in one atom of the isotope $ _{17}^{35}\textrm{Cl}$

(A) 17

(B) 18

(D) 52

▶️Answer/Explanation

Ans: B

Question 16:

Topic – C2.4 (Ions and ionic bonds)

Which statement about ions is not correct?
(A) Atoms form ions by gaining or losing electrons.
(B) Ions are formed by non-metal atoms only when they lose electrons.
(C) Ions in a solid ionic compound form a lattice structure.
(D) Ions with opposite charges attract each other.

▶️Answer/Explanation

Ans: B

Question 17:

Topic – C3.3 (The mole and the Avogadro constant)

1 g of hydrogen contains 6 × 10$^{23}$ atoms.
The relative atomic mass of helium is 4.
How many atoms does 1 g of helium contain?
(A) 1.5 × 10$^{23}$

(B) 3 × 10$^{23}$

(D) 2.4 × 10$^{24}$

▶️Answer/Explanation

Ans: A

Question 18:

Topic – C4.1 (Electrolysis)

Molten calcium bromide is electrolysed using inert electrodes.
What is the ionic half-equation at the cathode?
(A) Ca$^{+}$→ Ca + e$^{-}$
(B) Ca$^{+}$ + e$^{-}$→ Ca
(C) Ca$^{2+}$ → Ca + 2e$^{-}$
(D) Ca$^{2+}$ + 2e$^{-}$ → Ca

▶️Answer/Explanation

Ans: D

Question 19:

Topic – C5.1 (Exothermic and endothermic reactions)

Which energy level diagram correctly represents an exothermic reaction?

▶️Answer/Explanation

Ans: D

Question 20:

Topic – C6.3 (Redox)

Which equation represents a redox reaction?
(A) CaCO$_{3}$ → CaO + CO$_{2}$
(B) CuSO$_{4}$•5H$_{2}$O → CuSO$_{4}$ + 5H$_{2}$O
(C) 2Na + Cl$_{2}$ → 2NaCl
(D) NaOH + HCl → NaCl + H$_{2}$O

▶️Answer/Explanation

Ans: C

Question 21:

Topic – C8.4 (Transition elements)

What is not a property of transition elements?
(A) They often act as catalysts.
(B) They form coloured compounds.
(C) They have high densities.
(D) They have low melting points.

▶️Answer/Explanation

Ans: D

Question 22:

Topic – C8.5 (Noble gases)

Filament lamps require an inert atmosphere.
Which gas is used to fill these lamps?
(A) argon
(B) helium
(C) hydrogen
(D) oxygen

▶️Answer/Explanation

Ans: A

Question 23:

Topic – C9.3 (Alloys and their properties)

Alloys are formed by dissolving one metal in another.

Alloys are …….1….. .
……2…… alloys conduct electricity.

Which words complete gaps 1 and 2?

▶️Answer/Explanation

Ans: C

Question 24:

Topic – C9.4 (Reactivity series)

P, Q, R and S are four metals.
The oxide of metal R can be reduced by metal S, but not by metal P.
The oxide of metal Q can be reduced both by metal S and by metal P.
Which row shows the order of reactivity of these metals?

▶️Answer/Explanation

Ans: B

Question 25:

Topic – C10.2 (Air quality and climate)

Which statements about the Contact process are correct?

1 An iron catalyst is used.
2 Oleum is added to water.
3 Sulfur dioxide is converted to sulfur trioxide.
4 Sulfur trioxide is reacted with water.

(A) 1 and 2

(B) 1 and 4

(D) 3 and 4

▶️Answer/Explanation

Ans: C

Question 26:

Topic – C10.1 (Water)

What is not a use of limestone?
(A) manufacture of calcium oxide
(B) neutralising industrial waste products
(C) purifying water
(D) treating acidic soil

▶️Answer/Explanation

Ans: C

Question 27:

Topic – C11.7 (Polymers)

Which statement describes addition polymers?
(A) They contain long chains made from only one type of monomer.

(B) They contain links.

(D) They contain links.

▶️Answer/Explanation

Ans: A

Question 28:

Topic – P1.3 (Mass and weight)

The gravitational field strength at the Earth’s North Pole is greater than at the Equator.
An object is moved from the Equator to the North Pole.
What effect, if any, does this have on the mass and on the weight of the object?

▶️Answer/Explanation

Ans: C

Question 29:

Topic – P1.7 (Pressure)

A brick has a mass of 1.5 kg. It rests on the ground and the area of contact with the ground is 0.030 m2 .
A stack of such bricks is made by placing the bricks on top of each other, as shown.

The pressure on the ground due to the stack must not exceed 5700Pa.
What is the maximum number of bricks that can be made into such a stack?
gravitational field strength = 10 N/ kg
(A) 11

(B) 12

(D) 256

▶️Answer/Explanation

Ans: A

Question 30:

Topic – P1.6.1 (Energy)

Which equation for kinetic energy (K.E.) is correct?
(A) K.E. =$ \frac{1}{2}(mv)^{2}$
(B) K.E. = $\frac{1}{2}mv^{2}$
(C) K.E. = $(mv)^{2}$
(D) K.E. = mgh

▶️Answer/Explanation

Ans: B

Question 31:

Topic – P1.6.4 (Power)

A car accelerates uniformly from rest along a horizontal road. After 5.0 s, its kinetic energy is 400 kJ.
What is the useful power produced by the engine of the car?
(A) 80W

(B) 2000W

(D) 2 000 000W

▶️Answer/Explanation

Ans: C

Question 32:

Topic – P1.6.3 (Energy resources)

From which type of energy is electrical energy transferred in a hydroelectric power station?
(A) chemical potential energy
(B) elastic potential (strain) energy
(C) gravitational potential energy
(D) nuclear energy

▶️Answer/Explanation

Ans: C

Question 33:

Topic – P2.1.3 (Pressure changes)

A fixed mass of gas is trapped in a container. The temperature of the gas is increased but the volume of the container does not change.
How do the kinetic energy of the molecules and the pressure of the gas change?

▶️Answer/Explanation

Ans: D

Question 34:

Topic – P3.2.2 (Refraction of light)

The critical angle for diamond in air is 25°. Light travels faster in air than in diamond.
Which diagram shows the path of light passing from diamond into air?

▶️Answer/Explanation

Ans: D

Question 35:

Topic – P4.1 (Simple phenomena of magnetism)

Which type of magnet can be switched on and off many times per second?
(A) an electromagnet only
(B) a permanent magnet only
(C) both electromagnets and permanent magnets
(D) neither electromagnets or permanent magnets

▶️Answer/Explanation

Ans: A

Question 36:

Topic – P4.2.2 (Electric current)

A charge of 480 C passes through a wire in 3.0 minutes.
What is the average current in the wire?
(A) 2.7A

(B) 24A

(D) 1440A

▶️Answer/Explanation

Ans: A

Question 37:

Topic – P4.3.2 (Series and parallel circuits)

What is an advantage of connecting lamps in parallel in a circuit, rather than in series?
(A) The lamps do not use as much energy.
(B) The lamps last longer before failing.
(C) The potential difference (p.d.) across each lamp is smaller.
(D) When one lamp fails, all the others remain lit.

▶️Answer/Explanation

Ans: D

Question 38:

Topic – P4.4 (Electrical safety)

A device that is designed to protect a circuit contains a thin wire. When there is a large current
in the circuit, the thin wire melts and cuts off the supply.
What is the device?
(A) fuse
(B) lamp
(C) resistor
(D) thermistor

▶️Answer/Explanation

Ans: A

Question 39:

Topic – P4.5.4 (Force on a current-carrying conductor)

A current-carrying wire is placed between the poles of a magnet, as shown.
The current direction in the wire is shown.
A force is produced on the wire.
In which labelled direction does the force act?

▶️Answer/Explanation

Ans: B

Question 40:

Topic – C2.3 (Isotopes)

The diagrams represent pairs of nuclei of some atoms.
Which pair shows nuclei of different isotopes of the same element?

▶️Answer/Explanation

Ans: B

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