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Question 1:

Topic –  B1.1 (Characteristics of living organisms)

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)

Which structure in a plant cell allows osmosis to occur?

▶️Answer/Explanation

Ans: D

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 process involves enzymes?
(A)  absorption
(B)  digestion
(C)  egestion
(D)  ingestion

▶️Answer/Explanation

Ans: B

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)

Which food ensures the blood has enough haemoglobin to carry oxygen?
(A)  cheese which contains a large amount of calcium
(B)  orange juice which contains a large amount of vitamin C
(C)  liver which contains a large amount of iron
(D)  salmon which contains a large amount of vitamin D

▶️Answer/Explanation

Ans: C

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)

A student places an insect in a sealed test-tube and measures the concentration of oxygen and
carbon dioxide in the test-tube. The insect is left for 30 minutes.
The concentration of oxygen and carbon dioxide are then measured again. The results are shown in the table.
Which row shows how these concentrations change during the experiment?

▶️Answer/Explanation

Ans: B

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-  B15.3 (Sexual reproduction in plants)

The diagram shows a cross-section of a carpel of an insect-pollinated flower.

Which row correctly shows the processes that have taken place?

▶️Answer/Explanation

Ans: B

Question 11:

Topic –  B16.1 (Chromosomes and genes)

Which diagram correctly shows sex inheritance in humans?

▶️Answer/Explanation

Ans: C

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

(C)  N$_{2}$

(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

(C)  35

(D  52

▶️Answer/Explanation

Ans: B

Question 16:

Topic-  C2.1 (Elements, compounds, and mixtures)

A mixture contains water, H$_{2}$O, copper chloride, CuCl$_{2}$, and barium sulfate, BaSO$_{4}$.
How many different non-metallic elements are in the mixture?
(A)  2

(B)  4

(C)  7

(D)  12

▶️Answer/Explanation

Ans: B

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 –  C7.1 (The characteristic properties of acids and bases)

A metal oxide powder is added to a dilute acid.
The initial temperature of the acid is 21 ºC. The pH of the acid is 2.
When all the acid has reacted, the temperature of the reaction mixture is 23 ºC and the pH is 7.
Which statement describes this reaction?
(A)  It is endothermic and neutralisation.
(B)  It is endothermic and oxidation.
(C)  It is exothermic and neutralisation
(D)  It is exothermic and oxidation.

▶️Answer/Explanation

Ans:  C

Question 19:

Topic-  C6.2 (Rate of reaction)

A chemical reaction produces a gas.
The volume of gas given off over time is measured.
The results are shown.

During which time period is the rate of reaction greatest?
(A)  0–10 seconds
(B)  20–30 seconds
(C)  40–50 seconds
(D)  60–70 seconds

▶️Answer/Explanation

Ans: A

Question 20:

Topic- C9.2 (Uses of metals)

Which gas is produced when zinc reacts with dilute hydrochloric acid?
(A)  carbon dioxide
(B)  hydrogen
(C)  oxygen
(D) sulfur dioxide

▶️Answer/Explanation

Ans: B

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- C9.6 (Extraction of metals)

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- C10.1 (Water)

Which substance turns blue when it is added to pure water?
(A)  anhydrous copper(II) sulfate
(B)  anhydrous cobalt(II) chloride
(C)  red litmus
(D)  universal indicator

▶️Answer/Explanation

Ans: A

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- C11.4 (Alkanes)

Which statement about alkanes is correct?
(A)  They rapidly decolourise aqueous bromine.
(B) They are unsaturated hydrocarbons.
(C)  They are used to make polymers.
(D)  They can be used as fuels.

▶️Answer/Explanation

Ans: D

Question 28:

Topic – C12.1 (Experimental design)

Which quantity can be measured using only a measuring cylinder?
(A)  the density of a liquid
(B)  the mass of a liquid
(C)  the volume of a liquid
(D) the weight of a liquid

▶️Answer/Explanation

Ans: C

Question 29:

Topic – P1.2 (Motion)

The graph shows how the speed of an object varies with time.

How is the motion of the object described during the time shown by the graph?
(A)  moving at the start, then increasing speed with constant acceleration
(B)  moving at the start, then increasing speed with increasing acceleration
(C))  starting from rest, then increasing speed with constant acceleration
(D)  starting from rest, then moving at a constant speed

▶️Answer/Explanation

Ans: A

Question 30:

Topic-  P1.4 (Density)

The density of gold is 19 g/cm$^{3}$. The masses and volumes of four coins are given in the table.

Which coin is made of gold?

▶️Answer/Explanation

Ans: B

Question 31:

Topic- P1.6 (Energy, work, and power)

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 32:

Topic- P2.2 (Thermal properties and temperature)

A bowl of water is placed on a balance outside where it is sunny and windy. The reading on the balance is recorded.
After some time, the reading on the balance is less than the original reading.
Which statement explains why the reading is less?
(A)  The water has become cooler.
(B)  The water has become warmer.
(C)  The water has condensed.
(D)  The water has evaporated.

▶️Answer/Explanation

Ans: D

Question 33:

Topic-  P2.3 (Transfer of thermal energy)

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 (Light)

Light from an underwater lamp is refracted at the surface of water.
Which labelled angle is the angle of refraction of the light?

▶️Answer/Explanation

Ans: C

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-  P4.3 (Electrical circuits)

The diagram shows a 12V battery connected to two 6.0  resistors and a switch.

What is the current in the battery with the switch closed and what is the current with the switch open?

▶️Answer/Explanation

Ans: C

Question 37:

Topic- P4.3 (Electrical circuits)

The diagrams show four circuits each containing a motor and two switches. The switches are all open.
In one of the circuits, closing one of the switches on its own starts the motor turning, and closing
the other switch on its own also starts the motor turning.
Which circuit is this?

▶️Answer/Explanation

Ans: A

Question 38:

Topic- P4.3 (Electrical 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 39:

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 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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