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Question 1:-

Topic – B1.1 (Characteristics of living organisms)

Which characteristic of living things is shown when a green plant absorbs light energy and
produces glucose?
(A) excretion
(B) growth
(C) nutrition
(D) respiration

▶️Answer/Explanation

Ans : C

Question 2:-

Topic – B3.1 (Diffusion)

What is the effect of increasing the concentration gradient on the rate of diffusion?

▶Answer/Explanation

Ans 😀

Question 3:-

Topic – B4.1 (Biological molecules)

Which row identifies the elements that are found in a protein molecule?

▶Answer/Explanation

Ans :C

Question 4:-

Topic – B5.1 (Enzymes)

Which statements explain why an enzyme stops working when heated to high temperatures?
1. There is a low frequency of collisions between substrate and enzyme.
2. The active site no longer has a complementary shape to the substrate.
3. The enzyme is denatured.
(A) 1, 2 and 3 (B) 1 and 2 only (C) 1 and 3 only (D) 2 and 3 only

▶Answer/Explanation

Ans 😀

Question 5:-

Topic – B6.1 (Photosynthesis) and B6.2 (Leaf structure)

A farmer notices that the older leaves of his maize plant are becoming yellow between the veins.
What is the plant lacking?
(A) carbon dioxide
(B) magnesium ions
(C) sunlight
(D) water

▶Answer/Explanation

Ans :B

Question 6:-

Topic – B7.1 (Diet)

Which statements are correct?
1. A lack of vitamin C causes scurvy.
2. A lack of vitamin D causes softening of bones.
3. A lack of calcium causes kwashiorkor.
4. A lack of iron causes marasmus.
(A) 1 and 2 (B) 1 and 4 (C) 2 and 3 (D) 3 and 4

▶Answer/Explanation

Ans :A

Question 7:-

Topic – B8.1 (Xylem and phloem)

Which statement is correct?
(A) Xylem vessels are living and are involved in translocation.
(B) Xylem vessels are living and are involved in transpiration.
(C) Xylem vessels are dead and are involved in translocation.
(D) Xylem vessels are dead and are involved in transpiration.

▶Answer/Explanation

Ans 😀

Question 8:-

Topic – B12.1 (Respiration)

Which substances are used and produced in aerobic respiration?

▶Answer/Explanation

Ans :B

Question 9:-

Topic – B13.1 (Coordination and response)

The diagram shows a neurone and associated structures.

Which type of neurone is shown and in which direction do impulses travel?

▶Answer/Explanation

Ans :A

Question 10:-

Topic – B16.1 (Chromosomes and genes)

The body cells of tigers have 38 chromosomes. Which row shows the numbers of chromosomes involved during sexual reproduction in tigers?

▶Answer/Explanation

Ans :C

Question 11:-

Topic – B16.3 (Monohybrid inheritance)

Cystic fibrosis is a genetic condition. The allele for cystic fibrosis is recessive. The diagram shows inheritance of cystic fibrosis in a family.

What is the chance of the next child having cystic fibrosis?

(A) 0% (B) 25% (C) 75% (D) 100%

▶Answer/Explanation

Ans :B

Question 12:-

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

Which type of organism obtains energy by feeding only on plants?
(A) herbivore
(B) carnivore
(C) producer
(D) secondary consumer

▶Answer/Explanation

Ans :A

Question 13:-

Topic – B19.1 (Habitat destruction)

Deforestation changes the concentration of carbon dioxide and oxygen in the atmosphere. Which statement is correct?
(A) There is less carbon dioxide and more oxygen because there are fewer trees photosynthesising.
(B) There is less carbon dioxide and less oxygen because there are fewer trees respiring.
(C) There is more carbon dioxide and less oxygen because there are fewer trees photosynthesising.
(D) There is more carbon dioxide and more oxygen because there are fewer trees respiring.

▶Answer/Explanation

Ans :C

Question 14:-

Topic – C6.1 (Physical and chemical changes)

Which changes are chemical changes?
1. iron rusting
2. burning coal
3. dissolving sugar in water
4. boiling water
(A) 1 and 2 (B) 1 and 3 (C) 2 and 4 (D) 3 and 4

▶Answer/Explanation

Ans :A

Question 15:-

Topic – C2.5 (Simple molecules and covalent bonds)

Which row identifies the types of elements that form covalent compounds and a physical property
of covalent compounds?

▶Answer/Explanation

Ans :C

Question 16:-

Topic – C3.1 (Formulas) and C3.2 (Relative masses of atoms and molecules)

In an experiment, 2.4 g of magnesium, Mg, is burned in 5.0 g of oxygen, O₂.
The equation for the reaction is shown.
2Mg + O₂ → 2MgO
Which row identifies the substance that reacts completely and shows the mass of magnesium oxide formed?

▶Answer/Explanation

Ans :A

Question 17:-

Topic – C4.1 (Electrolysis)

Aqueous copper(II) sulfate is electrolysed using carbon electrodes.
Which row describes this electrolysis?

▶Answer/Explanation

Ans :C

Question 18:-

Topic – C5.1 (Exothermic and endothermic reactions)

Ultraviolet light causes a chlorine molecule to break down to form two chlorine atoms.
The equation for the reaction is shown.
Cl₂(g) → 2Cl(g)
What is the energy level diagram for this reaction?

▶Answer/Explanation

Ans 😀

Question 19:-

Topic – C6.2 (Rate of reaction)

A reaction is carried out at two different temperatures.
Which statement about the reaction at the higher temperature is not correct?
(A) A greater proportion of reacting particles possess the activation energy.
(B) Reacting particles collide more frequently.
(C) Reacting particles have greater kinetic energy.
(D) The activation energy of the reaction decreases.

▶Answer/Explanation

Ans 😀

Question 20:-

Topic – C6.3 (Redox)

The equation for the reaction between sodium bromide and concentrated sulfuric acid is shown.
2NaBr + 2H₂SO₄ → Na₂SO₄ + Br₂ + SO₂ + 2H₂O
What is oxidised in this reaction?
(A) sodium ions
(B) bromide ions
(C) hydrogen ions
(D) sulfate ions

▶Answer/Explanation

Ans :B

Question 21:-

Topic – C12.5 (Identification of ions and gases)

What is used to test for ammonia gas?
(A) a lighted splint
(B) aqueous sodium hydroxide
(C) damp red litmus paper
(D) limewater

▶Answer/Explanation

Ans :C

Question 22:-

Topic – C8.2 (Group I properties)

Which description of the Group I elements is correct?
(A) relatively hard metals
(B) relatively soft metals
(C) low melting point non-metals
(D) unreactive gases

▶Answer/Explanation

Ans :B

Question 23:-

Topic – C8.4 (Transition elements)

Element E is a transition element. It reacts with oxygen to form an oxide with the formula EO.
A student suggests three properties for element E and its oxide.
1. Element E floats on water.
2. The oxide EO is a white solid.
3. The oxide EO is basic and reacts with dilute acid.
Which of the suggestions must be correct?
(A) 1 and 2 (B) 1 only (C) 2 and 3 (D) 3 only

▶Answer/Explanation

Ans 😀

Question 24:-

Topic – C9.4 (Reactivity series)

Elements Q, T, X and Z are metals.
The equations for three reactions between some of these metals and some oxides and chlorides of these metals are shown.
Q(s) + XO(s) → QO(s) + X(s)
T(s) + ZCl₂(aq) → TCl 2(aq) + Z(s)
X(s) + TCl₂(aq) → XCl 2(aq) + T(s)
Which metal has the greatest tendency to form positive ions?
(A) Q (B) T (C) X (D) Z

▶Answer/Explanation

Ans :A

Question 25:-

Topic – C10.1 (Water)

Which row explains the use of chlorination and filtration in the treatment of the water supply?

▶Answer/Explanation

Ans 😀

Question 26:-

Topic – C10.2 (Air quality and climate)

The Contact process is used to manufacture sulfuric acid.
Which step in the Contact process is reversible?
(A) sulfur reacting with oxygen
(B) sulfur dioxide reacting with oxygen
(C) sulfuric acid reacting with sulfur trioxide
(D) oleum, H₂S₂O₇, reacting with water

▶Answer/Explanation

Ans :B

Question 27:-

Topic – C11.2 (Naming organic compounds)

Which compound name matches the structure shown?

▶Answer/Explanation

Ans :B

Question 28:-

Topic – P1.5.1 (Effects of forces)

X and Y are two springs.
The graph shows how the lengths of X and Y vary with the loads suspended from them.

Which statement about X and Y is correct?
(A) Neither spring obeys Hooke’s law for any value of load.
(B) The unstretched lengths of X and Y are different.
(C) The spring constant of X is greater than the spring constant of Y.
(D) Y needs a greater load than X to reach its limit of proportionality.

▶Answer/Explanation

Ans : D

Question 29:-

Topic – P1.6.4 (Power)

A 900W oven operates for 2.0 minutes. How much energy is transferred by the oven?
(A) 7.5 J (B) 450 J (C) 1.8 kJ (D) 108 kJ

▶Answer/Explanation

Ans : D

Question 30:-

Topic – P1.6.3 (Energy resources)

Which list of energy sources contains only non-renewable sources?
(A) coal, gas, nuclear fission
(B) coal, gas, geothermal
(C) gas, geothermal, nuclear fission
(D) gas, solar, wind

▶Answer/Explanation

Ans : A

Question 31:-

Topic – P2.2.2 (Melting, boiling, and evaporation)

The more energetic molecules of a liquid are escaping from its surface, causing the liquid to cool. What is happening to the liquid?
(A) It is boiling.
(B) It is condensing.
(C) It is evaporating.
(D) It is melting.

▶Answer/Explanation

Ans :C

Question 32:-

Topic – P2.1.1 (States of matter)

When solids, liquids and gases are heated, they expand. What is the order of the expansions of solids, liquids and gases, from smallest to largest?
(A) gas → liquid → solid
(B) liquid → gas → solid
(C) solid → gas → liquid
(D) solid → liquid → gas

▶Answer/Explanation

Ans 😀

Question 33:-

Topic – P3.2.1 (Reflection of light)

An object is placed in front of a mirror on a wall. Which statement about the image formed by the mirror is correct?
(A) The image and the object are equal distances from the mirror.
(B) The image is diminished (smaller than the object).
(C) The image is enlarged (larger than the object).
(D) The image is inverted (upside down).

▶Answer/Explanation

Ans :A

Question 34:-

Topic – P3.2.2 (Refraction of light)

What is the definition of the refractive index n of a substance?
(A) \(\frac{speed\\\ of\\\ light\\\ in\\\ a\\\ vacuum}{speed\\\ of\\\ light\\\ in\\\ the\\\ substance}\)

(B) \(\frac{speed\\\ of\\\ light\\\ in\\\ the\\\ substance}{speed\\\ of\\\ light\\\ in\\\ a\\\ vacuum}\)

(D) \(\frac{frequency\\\ of\\\ light\\\ in\\\ the\\\ substance }{frequency\\\ of\\\ light\\\ in\\\ a\\\ vacuum}\)

▶Answer/Explanation

Ans :A

Question 35:-

Topic – P3.3 (Electromagnetic spectrum)

The electromagnetic spectrum includes radio waves, infrared waves and X-rays. What is the correct sequence of these waves in order of increasing wavelength (smallest wavelength first)?
(A) infrared waves, radio waves, X-rays
(B) infrared waves, X-rays, radio waves
(C) X-rays, infrared waves, radio waves
(D) X-rays, radio waves, infrared waves

▶Answer/Explanation

Ans :C

Question 36:-

Topic – P4.2.4 (Resistance)

The diagram shows a wire of length l and diameter d.

Which pair of changes must increase the resistance of the wire?
(A) decreasing l and decreasing d
(B) decreasing l and increasing d
(C) increasing l and decreasing d
(D) increasing l and increasing d

▶Answer/Explanation

Ans :C

Question 37:-

Topic – P4.2.4 (Resistance)

The circuit shows a resistor and an NTC thermistor connected in series with a power supply. A voltmeter is connected across the resistor.

The temperature of the thermistor increases. What happens to the resistance of the thermistor and what happens to the reading on the voltmeter?

▶Answer/Explanation

Ans :B

Question 38:-

Topic – P4.4 (Electrical safety)

The table shows the usual current in each of four household appliances and the fuse used to
protect each of them. The only fuses available are rated at 3A, 5A or 13A. Which row shows an appliance that has been fitted with the most appropriate of the fuses available?

▶Answer/Explanation

Ans :B

Question 39:-

Topic – P4.5.1 (Electromagnetic induction)

A magnet is moved in and out of a coil and an electromotive force (e.m.f.) is induced. How can the size of the induced e.m.f. be decreased?
(A) Add more turns to the coil.
(B) Move the magnet more quickly.
(C) Move the magnet more slowly.
(D) Turn the magnet around before moving it in and out.

▶Answer/Explanation

Ans :C

Question 40:-

Topic – P5.2.3 (Radioactive decay)

A nucleus of carbon \(_{6}^{14}\textrm{C}\) decays by beta (β^–)-emission to an isotope of nitrogen N. What is the nuclide of nitrogen formed?
(A) \(_{4}^{10}\textrm{N}\)
(B) \(_{5}^{14}\textrm{N}\)
(C) \(_{7}^{14}\textrm{N}\)
(D) \(_{7}^{15}\textrm{N}\)

▶Answer/Explanation

Ans : C

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