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Question 1:

Topic – B12.1 (Respiration)

Which characteristic of living organisms involves chemical reactions that break down nutrient molecules to release energy?
(A)  excretion
(B)  nutrition
(C)  reproduction
(D)  respiration

▶️Answer/Explanation

Ans: D

Question 2:

Topic- B2.1 (Cell Structure)

What is found in plant cells but not in animal cells?
(A)  cell membrane
(B)  cell wall
(C)  nucleus
(D)  cytoplasm

▶️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)

Which statement about enzymes is correct?
(A)  They are made from fat molecules.
(B) They are used up in a reaction.
(C)  They speed up reactions.
(D) They are not affected by temperature.

▶️Answer/Explanation

Ans: C

Question 5:

Topic- B6.1 (Photosynthesis)

A plant with variegated leaves is destarched. A strip of black paper is attached to both sides of a leaf and the plant is placed in the light for 24 hours.

The leaf is then tested for starch.

Which areas of the leaf stain blue-black with iodine?
(A)  1 and 4

(B)  1 only

(C)  2 and 3

(D)  2 only

▶️Answer/Explanation

Ans: D

Question 6:

Topic- B7.2 (Digestive System)

The diagram shows part of the human alimentary canal.

Which row identifies P, Q and R?

▶️Answer/Explanation

Ans: D

Question 7:

Topic – B8.1 (Xylem and Phloem)

The diagrams represent sections through a root, a stem and a leaf mid-rib, not drawn to the same scale.

In which row are the sections correctly identified?

▶️Answer/Explanation

Ans: C

Question 8:

Topic- B12.1 (Respiration)

Which diagram of a cell shows the correct movement of substances for the process of aerobic respiration?

▶️Answer/Explanation

Ans: C

Question 9:

Topic- B13.2 (Hormones)

Which row shows a person’s response to a ‘fight or flight’ situation?

▶️Answer/Explanation

Ans: D

Question 10:

Topic- B15.1 & B15.2 (Asexual/Sexual Reproduction)

Aphids are insects. The information shown describes part of the lifecycle of the aphid.

             stage 1 In the spring, wingless females reproduce without fertilisation to produce many female offspring.

             stage 2 In late summer, both males and females are produced. The female’s eggs are fertilised by the male’s sperm.

Which row shows the type of reproduction occurring at stages 1 and 2?

▶️Answer/Explanation

Ans: B

Question  11:

Topic- B17.1 (Variation)

The size of tomatoes is an inherited characteristic with a range of phenotypes between two extremes.
What best describes this?
(A)  continuous variation
(B)  discontinuous variation
(C)  natural selection
(D)  selective breeding

▶️Answer/Explanation

Ans: A

Question 12:

Topic- B18.2 (Food Chains and Webs)

What is a producer in a food web?
(A)  an organism that gets its energy by digesting plants
(B)  an organism that makes its own food using light energy
(C)  an organism that obtains energy from digested animals
(D) an organism that gets its energy from dead or waste organic matter

▶️Answer/Explanation

Ans: B

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 (States of Matter)

Which change is represented by the diagram?

(A)  condensation
(B)  diffusion
(C)  evaporation
(D  solidification

▶️Answer/Explanation

Ans: B

Question 15:

Topic- C2.2 (Atomic Structure)

An atom of an element contains 9 protons, 10 neutrons and 9 electrons.
What is the nucleon number (mass number) of this element?
(A)  9

(B)  10

(C)  19

(D)  28

▶️Answer/Explanation

Ans: C

Question 16:

Topic-C3.1 (Formulas)

There are three times as many hydrogen atoms as carbon atoms in one molecule of hydrocarbon X.
What is the formula of X?
(A)  CH$_{4}$

(B)  C$_{2}$H$_{4}$

(C)  C$_{2}$H$_{6}$

(D)  C$_{2}$H$_{5}$OH

▶️Answer/Explanation

Ans: C

Question 17:

Topic-  C4.1 (Electrolysis)

Which process is used to produce sodium and chlorine from the compound sodium chloride?
(A)  chromatography
(B)  cracking
(C)  distillation
(D)  electrolysis

▶️Answer/Explanation

Ans: D

Question 18:

Topic- C5.1 (Chemical Energetics)

The temperature change as the result of a chemical reaction may go up or down.

Which rows about reactions are correct?
(A)  1 and 3

(B)  1 and 4

(C)  2 and 3

(D)  2 and 4

▶️Answer/Explanation

Ans: A

Question 19:

Topic- C6.2 (Rate of Reaction)

Two separate experiments X and Y are used to investigate the rate of the reaction between equal
masses of calcium carbonate and excess dilute hydrochloric acid.
The volume of carbon dioxide given off is measured over time.
A graph of the results is shown.

Which statement explains the difference between experiments X and Y?
(A)  A catalyst is added to Y.
(B)  A higher temperature is used in Y.
(C)  Larger pieces of calcium carbonate are used in X.
(D)  The acid is more concentrated in X.

▶️Answer/Explanation

Ans: D

Question 20:

Topic-  C7.1 (Acids and Bases)

Indigestion is caused by excess hydrochloric acid in the stomach.
Which substance can be used to neutralise the acid?

▶️Answer/Explanation

Ans: D

Question 21:

Topic- C8.3 (Group VII Properties)

Which statements about the elements in Group VII of the Periodic Table are correct?

1   Only one of them is a liquid at room temperature.
2   Their colours become darker down the group.
3   Their melting points and boiling points decrease down the group.
4   They are all metallic elements called halogens.

(A)  1 and 2

(B)  1 and 4

(C)  2 and 3

(D)  3 and 4

▶️Answer/Explanation

Ans: A

Question 22:

Topic- C8.3 (Group VII Properties)

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-  C8.5 (Noble Gases)

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-  C9.3 (Alloys)

Metal X is extracted from its ore by heating the ore with carbon.
Which statement explains why carbon is used?
(A)  Carbon is a non-metal.
(B)  Carbon is more reactive than X.
(C)  Carbon reacts with oxygen in the air.
(D)  Carbon is less reactive than X.

▶️Answer/Explanation

Ans: B

Question 25:

Topic- C10.2 (Air Quality)

Which row shows the relative abundance of the gases in clean air?

▶️Answer/Explanation

Ans: B

Question 26:

Topic –  C10.2 (Air Quality)

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-  C11.3 (Fuels)

Which fractions obtained by the fractional distillation of petroleum are used as fuels?

1 bitumen
2 diesel oil
3 gasoline
4 refinery gas

(A)  1 and 2 only

(B)  3 and 4 only

(C)  1, 2 and 3

(D)  2, 3 and 4

▶️Answer/Explanation

Ans: D

Question 28:

Topic-  P1.2 (Motion)

The diagram is the speed–time graph for a moving object.

What happens to the acceleration of the object during the time represented by the graph?
(A)  It decreases.
(B)  It increases.
(C)  It is greater than zero and stays constant.
(D)  It is zero and stays constant.

▶️Answer/Explanation

Ans: C

Question 29:

Topic-  P1.4 (Density)

A metal has a density of 10 g / cm$^{3}$ . A solid, cuboid block of this metal has the dimensions shown.

What is the mass of the block?
(A)  2.0 g

(B)  10 g

(C)  200 g

(D) 1000 g

▶️Answer/Explanation

Ans: D

Question 30:

Topic-  P1.5.1 (Effects of Forces)

An object is travelling at constant speed in a straight line. There is no resultant force on the object.
What happens to the object?
(A)  It continues at constant speed but changes direction.
(B)  It continues at constant speed in the same direction.
(C)  Its speed decreases but it continues in the same direction.
(D)  Its speed increases but it continues in the same direction.

▶️Answer/Explanation

Ans: B

Question 31:

Topic-  P1.6.4 (Power)

Two forklift trucks P and Q lift identical loads through the same vertical height.
Truck P takes a greater time than truck Q to lift the load.
Which statement is correct?
(A)  Truck P does more work than truck Q.
(B)  Truck P produces more power than truck Q.
(C)  Truck Q does more work than truck P.
(D)  Truck Q produces more power than truck P.

▶️Answer/Explanation

Ans: D

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-  P2.3.2 (Convection)

A hot metal ball is placed in a small hollow in a piece of wood. Two thermometers are placed
equal distances from the ball, one at position P and one at position Q.

Which thermometer gives the higher reading and why?

▶️Answer/Explanation

Ans: C

Question 34:

Topic-  P3.2.3 (Thin Converging Lens)

An object is placed at a certain distance from a converging lens. This distance is greater than
twice the focal length of the lens. The principal focus on each side of the lens is marked F and
two rays from the top of the object are shown.

Which statement about the image formed is correct?
(A)  The image is diminished and inverted.
(B)  The image is diminished and upright.
(C)  The image is enlarged and inverted.
(D)  The image is enlarged and upright.

▶️Answer/Explanation

Ans: A

Question 35:

Topic-  P3.3 (Electromagnetic Spectrum)

Which group shows electromagnetic waves in order of increasing frequency (lowest frequency first)?
(A) gamma-rays → X-rays → ultraviolet waves
(B) microwaves → infrared waves → gamma-rays
(C) ultraviolet waves → radio waves → infrared waves
(D) X-rays → radio waves → microwaves

▶️Answer/Explanation

Ans: B

Question 36:

Topic-  P4.1 (Simple 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 37:

Topic-  P4.2.1 (Electrical Charge)

A plastic rod is rubbed with a cloth causing a negative charge on the rod.
Which statements are correct?
1 The rod gains electrons.
2 The cloth loses electrons.
3 The cloth becomes positively charged.
(A)  1 and 2 only

(B)  1 and 3 only

(C) 2 and 3 only

(D) 1, 2 and 3

▶️Answer/Explanation

Ans: D

Question 38:

Topic-  P4.3.2 (Series and Parallel Circuits)

X, Y and Z are combinations of identical resistors.

The combinations are put in order of decreasing resistance (largest resistance to smallest resistance).
What is this order?
(A)  Y → X → Z

(B)  Y → Z → X

(C)  Z → X → Y

(D)  Z → Y → X

▶️Answer/Explanation

Ans: B

Question 39:

Topic-  P4.4 (Electrical Safety)

The maximum current in a food mixer during normal use is 3.1 A.
What is the most suitable rating for a fuse used to protect the mixer?
(A)  1A

(B)  3A

(C)  5A

(D)  8A

▶️Answer/Explanation

Ans: C

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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