Question 1:
Topic – B1.1 Characteristics of living organisms
Auxin is a chemical that is produced in shoot tips.
With which characteristics of living things is auxin involved?
▶️Answer/Explanation
Ans: A
Question 2:
Topic – B2.1 Cell structure
Which statement about the named cells is correct?
(A) Palisade mesophyll cells have many chloroplasts.
(B) Red blood cells have a haploid nucleus.
(C) Root hair cells have many chloroplasts.
(D) Sperm cells have a diploid nucleus.
▶️Answer/Explanation
Ans: A
Question 3:
Topic – B4.1 Biological molecules
Which large molecule is made from many smaller glucose molecules?
(A) amino acid
(B) glycerol
(C) glycogen
(D) protein
▶️Answer/Explanation
Ans: C
Question 4:
Topic – B2.1 Cell structure
Some bacteria live in acidic, hot springs.
What are the optimum conditions for the enzymes of these bacteria?
(A) 20 ºC and pH4
(B) 20 ºC and pH9
(C) 80 ºC and pH4
(D) 80 ºC and pH9
▶️Answer/Explanation
Ans: C
Question 5:
Topic – B6.1 Photosynthesis
Which statement about the process of photosynthesis is correct?
(A) Chlorophyll produces chemical energy for the synthesis of carbohydrates.
(B) Chlorophyll produces light energy for the synthesis of carbohydrates.
(C) Chlorophyll transfers chemical energy to light energy for the synthesis of carbohydrates.
(D) Chlorophyll transfers light energy to chemical energy for the synthesis of carbohydrates.
▶️Answer/Explanation
Ans: D
Question 6:
Topic – B7.2 Digestive system
Protein shakes are used by athletes to supplement their diet. They are a drink made by dissolving protein powders in water or milk.
Which types of digestion will be required before they can be absorbed?
▶️Answer/Explanation
Ans: B
Question 7:
Topic – B9.4 Blood
Which component of blood is matched to its function?
▶️Answer/Explanation
Ans: D
Question 8:
Topic – B11.1 Gas exchange in humans
Changes in the body occur as a result of increased physical activity.
What are effects R and S?
▶️Answer/Explanation
Ans: C
Question 9:
Topic – P1.5.3 Centre of gravity
A plant was placed horizontally in complete darkness.
The diagram shows how the plant had grown after one week.
Which response has the shoot made?
(A) gravitropism away from gravity
(B) gravitropism towards gravity
(C) phototropism away from light
(D) phototropism towards light
▶️Answer/Explanation
Ans: A
Question 10:
Topic – B15.4 Sexual reproduction in humans
What processes occur in the oviduct?
(A) fertilization and then the zygote undergo meiosis
(B) fertilization and then the zygote undergo mitosis
(C) zygote undergoes meiosis and then fertilization occurs
(D) zygote undergoes mitosis and then fertilization occurs
▶️Answer/Explanation
Ans: B
Question 11:
Topic – B16.3 Monohybrid inheritance
The pedigree diagram shows the inheritance of a recessive condition.
Which statements are correct with reference to this condition?
1 P and Q are both heterozygous for the condition.
2 Q and R have different genotypes.
3 P and R have the same genotype.
(A) 1, 2 and 3
(B) 1 and 2 only
(C) 1 and 3 only
(D) 2 and 3 only
▶️Answer/Explanation
Ans: C
Question 12:
Topic – B18.2 Food chains and food webs
What is a description of a trophic level?
(A) the ability of an organism to make its own food through photosynthesis
(B) the death of organisms due to increased availability of nitrates
(C) the interaction of an organism with its environment
(D) the position of an organism in a food chain
▶️Answer/Explanation
Ans: D
Question 13:
Topic – B19.1 Habitat destruction
Which graph represents a pollution incident in a lake causing eutrophication?
▶️Answer/Explanation
Ans: B
Question 14:
Topic – C2.4 Ions and ionic bonds
The bonding in potassium iodide is ionic.
Which row describes the potassium iodide lattice structure?
▶️Answer/Explanation
Ans: C
Question 15:
Topic – C3.2 Relative masses of atoms and molecules
What is the definition of the relative atomic mass, Ar, of an element?
(A) the average mass of atoms of the element on a scale in which an atom of $^{12}$C has a mass of exactly 12 units
(B) the average mass of atoms of the element on a scale in which an atom of $^{1}$H has a mass of exactly 1 unit
(C) the average mass of atoms of the element on a scale in which an atom of $^{12}$C has a mass of exactly 1 unit
(D) the mass in grams of one mole of atoms of the element
▶️Answer/Explanation
Ans: A
Question 16:
Topic – C4.1 Electrolysis
Which statements about the electrolysis of aqueous copper(II) sulfate are correct?
1 Oxygen is produced at the anode when carbon electrodes are used.
2 Copper is produced at the cathode when copper electrodes are used.
3 Hydrogen is produced at the cathode when carbon electrodes are used.
4 Electrolysis does not occur when inert electrodes are used.
(A) 1 and 2
(B) 1 and 4
(C) 2 and 3
(D) 3 and 4y
▶️Answer/Explanation
Ans: A
Question 17:
Topic – C5.1 Exothermic and endothermic reactions
What describes an endothermic reaction?
(A) a reaction in which all the bonds in all the reactants are broken
(B) a reaction in which energy is released to the surroundings
(C) a reaction which goes to completion
(D) a reaction in which energy is taken in from the surroundings
▶️Answer/Explanation
Ans: D
Question 18:
Topic – C6.2 Rate of reaction
The rate of a reaction that produces carbon dioxide gas is investigated.
Which piece of apparatus gives the least accurate measurement for the gas production?
(A) burette
(B) gas syringe
(C) measuring cylinder
(D) 3-decimal-place digital balance
▶️Answer/Explanation
Ans: C
Question 19:
Topic – C7.1 The characteristic properties of acids and bases
What happens when an acid reacts with an alkali?
(A) Neutralisation takes place and the temperature falls.
(B) Neutralisation takes place and the temperature rises.
(C) Reduction takes place and the temperature falls.
(D) Reduction takes place and the temperature rises.
▶️Answer/Explanation
Ans: B
Question 20:
Topic – C12.5 Identification of ions and gases
A student tests an aqueous solution for the presence of sulfate ions.
What is the test and observation for sulfate ions?
(A) Acidify the solution and add aqueous barium ions to produce a white precipitate.
(B) Acidify the solution and add aqueous silver ions to produce a cream precipitate.
(C) Add aqueous iron(III) ions to produce a brown precipitate.
(D) Add aqueous copper(II) ions to produce a pale blue precipitate.
▶️Answer/Explanation
Ans: A
Question 21:
Topic – C8.1 Arrangement of elements
Elements in Group VI share similar chemical and physical trends as elements in Group VII.
Which statement about the elements of Group VI is correct?
(A) Atoms of Group VI elements form cations when they react with sodium.
(B) Sulfur has a lower boiling point than tellurium.
(C) Selenium displaces sulfur from metal sulfides.
(D) The elements become lighter in colour as Group VI is descended.
▶️Answer/Explanation
Ans: B
Question 22:
Topic – C4.1 Electrolysis
The reactions of four different metals W, X, Y and Z with aqueous solutions of their ions are
listed.
● W reacts with aqueous ions of X and of Z but not with aqueous ions of Y.
● X does not react with aqueous ions of W, Y or Z.
● Y reacts with aqueous ions of W, X and Z.
● Z reacts with aqueous ions of X but not with aqueous ions of Y or W.
Which row shows the tendency of the metals to form positive ions?
▶️Answer/Explanation
Ans: B
Question 23:
Topic – C10.2 Air quality and climate
A sample of air is analyzed before and after it is used in an experiment.
The percentage composition of the air before and after the experiment is recorded.
Which process does not produce this change in the composition of the air?
(A) combustion of coal
(B) combustion of natural gas
(C) combustion of sulfur
(D) respiration
▶️Answer/Explanation
Ans: C
Question 24:
Topic – B5.1 Enzymes
What is the catalyst used in the Contact process?
(A) yeast
(B) iron
(C) nickel
(D) vanadium(V) oxide
▶️Answer/Explanation
Ans: D
Question 25:
Topic – C9.6 Extraction of metals
What is the word equation for the manufacture of lime?
(A) calcium carbonate → calcium hydroxide + carbon dioxide
(B) calcium carbonate → calcium oxide + carbon dioxide
(C) calcium sulfate → calcium hydroxide + sulfur dioxide
(D) calcium sulfate → calcium oxide + sulfur dioxide
▶️Answer/Explanation
Ans: B
Question 26:
Topic – C11.3 Fuels
Petroleum is separated into useful fractions by fractional distillation.
Which row shows the uses of the named fractions?
▶️Answer/Explanation
Ans: D
Question 27:
Topic – C11.5 Alkenes
Which substance decolorizes aqueous bromine?
▶️Answer/Explanation
Ans: C
Question 28:
Topic – P1.1 Physical quantities and measurement techniques
The weight of a man on the Earth is 600 N, where the gravitational field strength is 10 N/ kg.
The gravitational field strength on the Moon is 1.6 N/ kg.
What is the weight of the man on the Moon?
(A) 60 N
(B) 96 N
(C) 600 N
(D) 960 N
▶️Answer/Explanation
Ans: B
Question 29:
Topic – P1.5 Forces
A uniform beam of length 20 cm is balanced on a pivot at its centre.
A 20 N load is placed at one end of the beam and a 30 N load is placed at the other end.
A 25 N load is also placed on the beam to balance it.
How far from the pivot is the 25 N load placed?
(A) 4.0 cm
(B) 5.0 cm
(C) 8.0 cm
(D) 10 cm
▶️Answer/Explanation
Ans: A
Question 30:
Topic – P1.3 Mass and weight
A rope is used to pull a block of mass 25 kg up a slope from point X to point Y.
Three distances are shown on the diagram.
The gravitational field strength g is 10 N/ kg.
What is the increase in gravitational potential energy of the block?
(A) 125 J
(B) 750 J
(C) 1000 J
(D) 1250 J
▶️Answer/Explanation
Ans: B
Question 31:
Topic – B8.3 Transpiration
A liquid starts to evaporate.
Which molecules escape and what happens to the temperature of the remaining liquid?
▶️Answer/Explanation
Ans: C
Question 32:
Topic – P1.6 Energy, work and power
Water in a metal pan is heated on a gas burner.
What are the main methods by which heat is transferred through the metal pan to the water and throughout the water?
(A) conduction through the metal pan and convection in the water
(B) convection through the metal pan and conduction in the water
(C) convection through the metal pan and radiation in the water
(D) radiation through the metal pan and conduction in the water
▶️Answer/Explanation
Ans: A
Question 33:
Topic – P3.2 Light
The critical angle of water is 49º.
A ray of light from the bottom of a swimming pool has an angle of incidence of 50º at the surface of the water.
What happens to the ray of light?
(A) It is all refracted with an angle of refraction of 49º.
(B) It is partly reflected and partly refracted.
(C) It is totally internally reflected with an angle of reflection of 50º.
(D) It travels along the surface of the water.
▶️Answer/Explanation
Ans: C
Question 34:
Topic – P3.4 Sound
Humans can hear sounds with a range of frequencies.
Which row shows the smallest frequency and the greatest frequency that can be heard by a healthy human ear?
▶️Answer/Explanation
Ans: B
Question 35:
Topic – P4.2 Electrical quantities
A plastic rod is rubbed with a cloth.
The rod becomes positively charged.
What happens to the rod and what happens to the cloth?
▶️Answer/Explanation
Ans: A
Question 36:
Topic – P4.3 Electrical circuits
The circuit shown contains a battery, two resistors, a voltmeter and an ammeter.
One of the resistors has a resistance of 2.0 Ω. The reading on each meter is shown.
What is the potential difference (p.d.) across the battery?
(A) 3.0V
(B) 6.0V
(C) 8.0V
(D) 11V
▶️Answer/Explanation
Ans: D
Question 37:
Topic – P4.2 Electrical quantities
A heating element in an electric kettle has a resistance of 24 Ω.
When the kettle is connected to a 240V supply, it takes 2.5 minutes to boil some water.
How much energy is used to boil the water?
(A) 16 J
(B) 960 J
(C) 6000 J
(D) 360 000J
▶️Answer/Explanation
Ans: D
Question 38:
Topic – P4.3 Electrical circuits
A student connects the circuit shown.
When the switch is closed, the fuse blows and stops the current.
What is a possible reason for this?
(A) The current rating of the fuse is too high.
(B) The current is too large.
(C) The lamp is too dim.
(D) The voltage is too small.
▶️Answer/Explanation
Ans: B
Question 39:
Topic – P4.2.5 Electrical energy and electrical power
Electrical energy from a power station is transmitted over a large distance. A 100% efficient
transformer is used near to the power station. This transformer reduces the energy that is wasted thermally in the transmission cables.
How does the transformer reduce the energy that is wasted?
(A) It decreases the power transmitted so the current and the voltage are both larger.
(B) It decreases the power transmitted so the current and the voltage are both smaller.
(C) It increases the current so the voltage is smaller.
(D) It increases the voltage so the current is smaller.
▶️Answer/Explanation
Ans: D
Question 40:
Topic – P5.2.1 Detection of radioactivity
The diagram shows a radioactive source emitting three types of ionizing radiation, X, Y and Z.
The radiation passes through an electric field between two metal plates, as shown.
Which row identifies the three types of radiation?
▶️Answer/Explanation
Ans: A