Home / 0654_w22_qp_11

Question 1 :

 (a): B1.1 – Gas exchange in fish (Adaptive features of gills)

 (b): B1.2 – Composition of inspired and expired air

 (c): B2.1 – Adaptive features of red blood cells for oxygen transport

 (d): B3.1 – Diseases caused by smoking and the role of goblet cells, mucus, and ciliated cells

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-2 – Diseases Caused by Smoking

    • Lung cancer and other smoking-related diseases

    • Components in tobacco smoke that cause cancer

    • Protection mechanisms of the gas exchange system

What is the formula for magnification?
(A) $\frac{\text{actual size}}{\text{image size}}$

(B) $\frac{\text{actual size}}{\text{image size}}$× 100

(C) $\frac{\text{image size}}{\text{actual size}}$

(D) $\frac{\text{image size}}{\text{actual size}}$ mm

▶️Answer/Explanation

Ans : C

Question 3 :

      Topic-3   Energy Release from Fuels

    • Combustion of ethanol

    • Exothermic reactions and energy level diagrams

    • Production of ethanol by fermentation and catalytic addition

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

▶️Answer/Explanation

Ans : A

Question 4 :

    topic – Kinetic Energy and Motion

    • Calculation of kinetic energy

    • Deceleration and speed-time graphs

    • Pressure and area calculations

Which elements can be found in an enzyme molecule?

1 carbon
2 nitrogen
3 oxygen

(A)  1, 2 and 3

(B)  1 and 3 only

(C)  1 only

(D)  2 only

▶️Answer/Explanation

Ans : A

Question 5 :

  topic-  Photosynthesis and Plant Growth

    • Effect of light intensity on photosynthesis

    • Role of magnesium and nitrate ions in plant growth

    • Synthesis of carbohydrates and amino acids

Which row is correct for photosynthesis?

 

▶️Answer/Explanation

Ans : B

Question 6 :

Topic –  Metals and Their Properties

    • Flame tests for Group I metals

    • Transition elements and precipitation reactions

    • Ionic bonding and melting points of ionic compounds

Dogs are mammals and have the same types of teeth as humans.
Which tooth is a canine?

▶️Answer/Explanation

Ans : D

Question 7 :

   Topic-  Density and Thermal Expansion

    • Calculation of density

    • Effects of thermal expansion on density

    • Conduction in materials

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 – Anaerobic Respiration

    • Production of carbon dioxide by yeast

    • Role of enzymes in respiration

    • Products of different types of respiration

The diagram shows apparatus used to investigate respiration of blowfly larvae.
Air is sucked through the solutions of hydrogencarbonate indicator as shown.
Hydrogencarbonate indicator turns orange with carbon dioxide at atmospheric concentration. It
turns yellow with high carbon dioxide concentration.

What are the colours of the hydrogencarbonate indicator in the flasks after 24 hours?

▶️Answer/Explanation

Ans : B

Question 9 :

Topic –   Water Treatment and Testing

    • Stages of water treatment

    • Testing for chloride and sulfate ions

    • Reactions involving barium chloride and sodium sulfate

When a seed germinates in the soil, the root grows downwards.
Which type of response is the root exhibiting?
(A)  negative gravitropism
(B)  negative phototropism
(C)  positive gravitropism
(D)  positive phototropism

▶️Answer/Explanation

Ans : C

Question 10 :

   topic – Ionising Radiation

    • Properties of β-particles and α-particles

    • Safety measures when handling radioactive sources

    • Efficiency and power calculations in electronic devices

The graph shows the change in number of new HIV infections and deaths from AIDS between 1990 and 2014.

What does the graph show?
1   The number of new HIV infections fell after condom use was promoted.
2   The use of anti-HIV drugs has led to a decrease in deaths from AIDS.
3   The highest rate of deaths from AIDS occurred in 1995.

(A)  1 and 2 only

(B)  3 only

(C)  1, 2 and 3

(D)  2 only

▶️Answer/Explanation

Ans : D

Question 11 :

Which sex chromosomes are found in a healthy male human?
(A)  XO

(B)  XX

(C)  XY

(D)  YY

▶️Answer/Explanation

Ans : C

Question 12 :

Which type of organism gets its energy from the remains of dead organisms or other organic waste?
(A)  a carnivore
(B)  a decomposer
(C)  a herbivore
(D)  a producer

▶️Answer/Explanation

Ans : B

Question 13 :

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 :

Which properties are used to distinguish between solids and gases?

1  compressibility
2  melting point
3  flammability

(A)  1 and 2 only

(B) 1 and 3 only

(C)  2 and 3 only

(D)  1, 2 and 3

▶️Answer/Explanation

Ans : A

Question 15 :

An atom of fluorine is represented by $\frac{19}{9}F$.
How many electrons does this atom contain?
(A)  9

(B)  10

(C)  19

(D)  28

▶️Answer/Explanation

Ans : A

Question 16 :

Hydrogen reacts with oxygen to produce water.
What is the balanced equation for this reaction?
(A)  H$_{2}$ + O$_{2}$ → H$_{2}$O
(B)  H$_{2}$ + O$_{2}$ → 2H$_{2}$O
(C)  H$_{2}$ + O → H$_{2}$O
(D)  2H$_{2}$ + O$_{2}$ → 2H$_{2}$O

▶️Answer/Explanation

Ans : D

Question 17 :

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 :

Equal amounts of substances W, X, Y and Z are reacted separately with equal amounts of dilute acid.
The following temperature changes are recorded.

Which substances produce the most exothermic and the least endothermic reactions?

▶️Answer/Explanation

Ans : D

Question 19 :

The rate of a reaction between a powdered metal and a dilute acid is investigated by measuring  the volume of hydrogen gas produced per minute.

The investigation is repeated using a catalyst. The same mass of powdered metal and the same volume and concentration of acid is used.

Which statement about the second investigation is correct?
(A)  The rate of the reaction is higher and a greater total volume of hydrogen is produced.
(B)  The rate of the reaction is higher and the same total volume of hydrogen is produced.
(C)  The rate of the reaction is lower and a smaller total volume of hydrogen is produced.
(D)  The rate of the reaction is lower and the same total volume of hydrogen is produced.

▶️Answer/Explanation

Ans : B

Question 20 :

Copper carbonate is reacted with dilute hydrochloric acid.
Which gas is given off?
(A)  carbon dioxide
(B) hydrogen
(C) nitrogen
(D) sulfur dioxide

▶️Answer/Explanation

Ans : A

Question 21 :

Which statement about the halogens is not correct?
(A)  Iodine has a darker colour than chlorine.
(B)  They all exist as diatomic molecules.
(C)  They are all gases at room temperature.
(D)  They are all non-metals.

▶️Answer/Explanation

Ans : C

Question 22 :

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 :

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 :

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 :

Water is tested with white copper(II) sulfate powder and with blue cobalt(II) chloride paper.
Which row shows the results of the tests?

▶️Answer/Explanation

Ans : B

Question  26 :

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 :

In which row is the name of the structure correct?

▶️Answer/Explanation

Ans : C

Question 28 :

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

Which graph is the distance–time graph for this object?

▶️Answer/Explanation

Ans : D

Question 29 :

Five identical solid glass balls, each of mass 5.0 g, are put into a measuring cylinder containing water.
The water level in the measuring cylinder rises from the 30 cm$^{3}$ mark to the 40 cm$^{3}$ mark.

What is the density of the glass from which the balls are made?
(A)  0.50 g/cm$^{3}$

(B)  1.2 g/cm$^{3}$

(C)  1.6 g/cm$^{3}$

(D)  2.5 g/cm$^{3}$

▶️Answer/Explanation

Ans : D

Question 30 :

A force of 10 N is applied to a beam at a distance of 0.25 m from a pivot.

Which calculation gives the moment of the force about the pivot in N m?
(A)  10 × 0.25

(B)  $\frac{10}{0.25}$

(C)  10 + 0.25

(D) 10 – 0.25

▶️Answer/Explanation

Ans : A

Question 31 :

Which electrical device transfers chemical energy into electrical energy?
(A)  battery
(B)  lamp
(C)  electric motor
(D) television

▶️Answer/Explanation

Ans : A

Question 32 :

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 :

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 :

Which description is correct for the image of an object formed by a vertical plane mirror?
(A)  upright and larger than the object
(B)  upright and the same size as the object
(C)  upside down and smaller than the object
(D)  upside down and the same size as the object

▶️Answer/Explanation

Ans : B

Question 35 :

Two students conduct an experiment to determine the speed of sound in air.
They stand 639 m apart.
One student hits two blocks of wood together while the other uses a stop-watch to time how long
it takes for the sound to reach him.
It takes 1.80 s for the sound to reach the second student.
What is the speed of sound in air, calculated using these results?
(A)  330 m/s

(B)  355 m/s

(C)  710 m/s

(D)  1150 m/s

▶️Answer/Explanation

Ans : B

Question 36 :

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 :

In which circuit is it possible to change the brightness of one lamp without changing the brightness of the other lamp?

▶️Answer/Explanation

Ans : B

Question 38 :

Circuits 1 and 2 contain identical cells and identical resistors. Each resistor has the same 
resistance R. The current in the cell in circuit 1 is I.

How do the total resistance of circuit 2 and the current in the cell in circuit 2 compare with R and I?

▶️Answer/Explanation

Ans : C

Question 39 :

The current in an electric heater during normal use is 11A.
What is an appropriate rating for a fuse to protect the heater?
(A)  3A

(B)  10A

(C)  13A

(D)  36A

▶️Answer/Explanation

Ans : C

Question 40 :

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

▶️Answer/Explanation

Ans : B

Scroll to Top