CBSE Class 10 Science Term 1 Sample Paper Solved 2022

Question. Beams of light are incident through the holes A and B and emerge out of box through the holes C and D respectively as shown in the given figure. Which of the following could be inside the box? 

(a) A rectangular glass slab
(b) A convex lens
(c) A concave lens
(d) A prism

Answer : D

Question. A ray of light is travelling in a direction perpendicular to the boundary of a parallel glass slab. The ray of light:
(a) is refracted towards the normal
(b) is refracted away from the normal
(c) is reflected along the same path
(d) does not get refracted

Answer : D

Question. A rainbow occurs after a shower. It always appears on which side of the sun? 
(a) On the same side of sun
(b) On the opposite side of sun
(c) On the right side of sun
(d) On the left side of sun

Answer : B

Question. Calcium oxide can be reduced to calcium, by heating with sodium metal. Which compound would act as an oxidizing agent in the above process?
(a) Sodium
(b) sodium oxide
(c) calcium
(d) calcium oxide

Answer : D

Question. A ray of light that strikes a plane mirror PQ at an angle of incidence of 30°, is reflected from the plane mirror and then strikes a second plane mirror QR placed at right angles to the first mirror. The angle of reflection at the second mirror is:
(a) 30°
(b) 45°
(c) 60°
(d) 90°

Answer : C

Question. Photosynthesis is an anabolic process. It occurs in
(a) Chloroplast
(b) Mitochondria
(c) Cytoplasm
(d) None of these

Answer : A

Question. Three beakers labelled as A, B and C each containing 25 mL of water were taken. A small amount of NaOH, anhydrous CuSO4 and NaCl were added to the beakers A, B and C respectively. It was observed that there was an increase in the temperature of the solutions contained in beakers A and B, whereas in case of beaker C, the temperature of the solution falls. Which one of the following statement(s) is(are) correct?
(i) In beakers A and B, exothermic process has occurred.
(ii) In beakers A and B, endothermic process has occurred.
(iii) In beaker C exothermic process has occurred.
(iv) In beaker C endothermic process has occurred.
(a) (i) only
(b) (ii) only
(c) (i) and (iv)
(d) (ii) and (iii)

Answer : C

Question. In an attempt to demonstrate electrical conductivity through an electrolyte, the following apparatus as shown in figure was set up. Which among the following statement(s) is(are) correct? 


(i) Bulb will not glow because electrolyte is not acidic
(ii) Bulb will glow because NaOH is a strong base and furnishes ions for conduction.
(iii) Bulb will not glow because circuit is incomplete
(iv) Bulb will not glow because it depends upon the type of electrolytic solution
(a) (i) and (iii)
(b) (ii) and (iv)
(c) (ii) only
(d) (iv) only

Answer : C

Question. Which one of the following four metals would be displaced from the solution of its salt by other three metals?
(a) Mg
(b) Ag
(c) Zn
(d) Cu

Answer : B

Question. Which of the following salts does not contain water of crystallisation?
(a) Blue vitriol
(b) Baking soda
(c) Gypsum
(d) Washing soda

Answer : B

Question. Refractive index of diamond with respect to glass is 1.6. If the absolute refractive index of glass is 1.5, then the absolute refractive index of diamond is
(a) 1.4
(b) 2.4
(c) 3.4
(d) 4.4

Answer : B

Question. During the preparation of hydrogen chloride gas on a humid day, the gas is usually passed through the guard tube containing calcium chloride. The role of calcium chloride taken in the guard tube is to
(a) absorb the evolved gas
(b) moisten the gas
(c) absorb moisture from the gas
(d) absorb Cl– ions from the evolved gas

Answer : C

Question. If a few drops of a concentrated acid accidentally spills over the hand of a student, what should be done?
(a) Wash the hand with saline solution
(b) Wash the hand immediately with plenty of water and apply a paste of sodium hydrogencarbonate
(c) After washing with plenty of water apply solution of sodium hydroxide on the hand
(d) Neutralise the acid with a strong alkali

Answer : B

Question. The given figure shows a ray of light as it travels from medium A to medium B. Refractive index of the medium B relative to medium A is


(a) √3 / √2
(b) √2 / √3
(c) 1 / √2
(d) √2

Answer : D

Question. The following reaction is used for the preparation of oxygen gas in the laboratory:
2KCIO₃^Heat→ Catalyst 2KCI(S) + 3O₂(g)
Which of the following statement(s) is correct about the reaction?
(a) It is a decomposition reaction and endothermic in nature.
(b) It is a combination reaction
(c) It is a decomposition reaction and is accompanied by release of heat.
(d) It is a photochemical decomposition reaction and exothermic in nature.

Answer : A

Question. An object is placed 60 cm in front of a concave mirror. The real image formed by the mirror is located 30 cm in front of the mirror. What is the object’s magnification?
(a) +2
(b) -2
(c) +0.5
(d) -0.5

Answer : D

Question. In which of the following groups of organisms, food material is broken down outside the body and absorbed?
(a) Mushroom, green plants, Amoeba
(b) Yeast, mushroom, bread mould
(c) Paramecium, Amoeba, Cascuta
(d) Cascuta, lice, tapeworm

Answer : B

Question. Plants use the energy stored in ATP to accomplish the process of transportation of:
(a) Water and minerals
(b) Oxygen
(c) Water, minerals and food
(d) Food

Answer : D

Question. Which of the following is not an ionic compound?
(a) KCl
(b) MgCl₂
(c) CCl₄
(d) NaCl

Answer : C

Question. If salivary amylase is lacking in the saliva, which of the following events in the mouth cavity will be affected?
(a) Proteins breaking down into amino acids.
(b) Starch breaking down into sugars.
(c) Fats breaking down into fatty acids and glycerol.
(d) Absorption of vitamins.

Answer : B

Question. Identify X, Y, Z and match with their respective functions.



(a) X-allows blood flow
(b) Y-returns blood to patient
(c) X-allows blood flow
(d) X-diffusion of blood

Answer : B

Question. The pH of gastric juices released during digestion is:
(a) less than 7
(b) more than 7
(c) equal to 7
(d) equal to 0

Answer : A

Question. An element reacts with oxygen to give a compound with a high melting point. This compound is also soluble in water. The element is likely to be
(a) Ca
(b) C
(c) Si
(d) Fe

Answer : A

Question. A convex mirror used for the rear view on an automobile has a focal length of 2.5 m. A car is located at a distance of 4 m from the mirror. In the above scenario the sign that should be assigned to f and u is
(a) u positive, f negative
(b) f positive, u negative
(c) f and u are positive
(d) f and u negative

Answer : B

Question. Raw materials required in the autotrophic mode of nutrition involves:
I. Carbon dioxide and water
II. Chlorophyll
III. Nitrogen
IV. Sunlight
(a) I, II and III
(b) I and II
(c) I, II and IV
(d) All of these.

Answer : C

Question. Match the chemical substances given in Column (A) with their appropriate application given in Column (B) 

(a) A—(ii), B—(i), C—(iv), D—(iii)
(b) A—(iii), B—(ii), C—(iv), D—(i)
(c) A—(iii), B—(iv), C—(i), D—(ii)
(d) A—(ii), B—(iv), C—(i), D—(iii)

Answer : C

Question. A lens of focal length 12 cm forms an erect image, three times the size of the object. The distance between the object and image is:
(a) 8 cm
(b) 16 cm
(c) 24 cm
(d) 36 cm

Answer : A

Question. Amoeba shows the following kind of nutrition
(a) Autotrophic
(b) Holozoic
(c) Saprotrophic
(d) Parasitic

Answer : B

Question. Which of these statements is incorrect regarding human lungs?
(a) It is the secondary organ for respiration.
(b) It is located on the two sides of heart.
(c) The membrane that encloses lungs is pleural membrane.
(d) The alveolar epithelium of lungs is non-ciliated epithelium.

Answer : A

Question. In a concave mirror an erect and virtual image is formed when the object is placed
(a) Between C and F
(b) Beyond C
(c) Between P and F
(d) At C

Answer : C

Question. The magnification (m) of a lens can be calculated by using the formula
(a) m = –v/u
(b) m = v/u
(c) m = hi/ho
(d) Both (b) and (c)

Answer : D

Question. Which of the following pairs will give displacement reactions?
(a) NaCl solution and copper metal
(b) MgCl₂ solution and aluminium metal
(c) FeSO₄ solution and silver metal
(d) AgNO₃ solution and copper metal

Answer : D

Question. The process by which blood is cleared of metabolic wastes in case of kidney failure is called
(a) Artificial kidney
(b) Dialysis
(c) Transplantation
(d) Filtration

Answer : B

Question. Which of the following statements is/are correct?
I. Value of F in a concave mirror is taken as negative.
II. Value of F in a convex mirror is taken as negative.
III. Distances measured to the right of the origin are taken as positive.
IV. Distances measured to the left of the origin are taken as negative.
(a) I, III, IV
(b) II, III, IV
(c) II only
(d) I only

Answer : A

Question. Sodium metal reacts with water vigorously to produce a gas with a hissing sound. The gas evolved is
(a) Hydrogen gas
(b) Nitrogen gas
(c) Carbon dioxide gas
(d) Oxygen gas

Answer : A

Question. The diameter of the reflecting surface of a spherical mirror is called its
(a) Centre of curvature
(b) R = 2f
(c) Aperture
(d) Principal focus

Answer : C

Question. Which of the following are present in a dilute aqueous solution of hydrochloric acid?
(a) H₃O⁺ + Cl–
(b) H₃O⁺ + OH–
(c) Cl– + OH–
(d) unionised HCl

Answer : A

Question. Which of the following organisms have parasitic mode of nutrition?
(a) Penicillium
(b) Plasmodium
(c) Paramecium
(d) Rhizobium

Answer : B

Question. Which among the following is not a base?
(a) NaOH
(b) KOH
(c) NH₄OH
(d) C₂H₅OH

Answer : D

Question. The diagram shows a kidney and its associated vessels. 

Which structure have the most and least urea concentration?
Most Least
(a) 1 2
(b) 4 1
(c) 4 3
(d) 5 3

Answer : D

Question. If a ray of light that is incident on a convex lens is parallel to its principal axis, the refracted ray passes through
(a) F₂
(b) 2F₂
(c) O
(d) Principal axis.

Answer : A

Question. Read the following statements carefully.
I. The prism behaves same as that of rectangular glass slab.
II. All the colours have different angles of deviation in case of dispersion through prism.
III. All the colours travel with the same speed of light in glass.
IV. Dispersion of light is observed in case of rectangular glass slab.
Which of the above statement/s is true?
(a) Only II
(b) I and II only
(c) I, II and IV only
(d) All of the above

Answer : A

Question. Rusting of iron involves a chemical reaction which is a combination of:
(a) Reduction as well as combination reactions
(b) Oxidation as well as combination reactions
(c) Reduction as well as displacement reactions
(d) Oxidation as well as displacement reactions

Answer : B

Question. Arteries and veins are connected by a network of extremely narrow tubes called:
(a) Sieve tubes
(b) Capillaries
(c) Vena cava
(d) Valves

Answer : B

(a) Both A and R are true and R is the correct explanation of A
(b) Both A and R are true and R is not the correct explanation of A
(c) A is true but R is false
(d) A is false but R is true

Question. Assertion: Lipases help in emulsification of fats.
Reason: Lipases hydrolyses fats and oils.

Answer : D

Question. Assertion: The sky appears dark to people flying at high altitudes.
Reason: The atmosphere is denser close to the earth.

Answer : B

Question. Assertion: Decomposition of vegetable matter into compost is an example of exothermic reactions.
Reason: Exothermic reaction are those reactions in which heat is evolved.

Answer : A

Question. Assertion: Bleaching powder has a strong smell of chlorine.
Reason: Bleaching powder is a white powder and an oxidizing agent.

Answer : B

I. Marble’s popularity began in ancient Rome and Greece, where white and off-white marble were used to construct a variety of structures, from hand-held sculptures to massive pillars and buildings. 

Question. Gas A, obtained above is a reactant for a very important biochemical process which occurs in the presence of sunlight. Identify the name of the process.
(a) Respiration
(b) Photosynthesis
(c) Transpiration
(d) Sphotolysis

Answer : B

Question. A student added 10g of calcium carbonate in a rigid container, secured it tightly and started to heat it. After some time, an increase in pressure was observed, the pressure reading was then noted at intervals of 5 mins and plotted against time, in a graph as shown below. During which time interval did maximum decomposition took place? 

(a) 15-20 min
(b) 10-15 min
(c) 5-10 min
(d) 0-5 min

Answer : D

Question. Marble statues are corroded or stained when they repeatedly come into contact with polluted rain water. Identify the main reason. 

(a) decomposition of calcium carbonate to calcium oxide
(b) polluted water is basic in nature hence it reacts with calcium carbonate
(c) polluted water is acidic in nature hence its with calcium carbonate
(d) calcium carbonate dissolves in water to give calcium hydroxide.

Answer : C

Question. The substance not likely to contain CaCO₃ is
(a) Dolomite
(b) A marble statue
(c) Calcined gypsum
(d) Sea shells.

Answer : C

II. A narrow beam of white light passing through a glass prism as shown in the diagram. Study the diagram and answer the questions. 

Question. Which of the following statement is correct about constituents of white light?
(a) White light consists of seven colours
(b) Violet colour suffers minimum deviation
(c) Red light suffers maximum deviation
(d) All the colours of the white light move with different speed in vacuum.

Answer : A

Question. The phenomenon observed in the given set-ups is
(a) scattering of light
(b) dispersion of light
(c) reflection of light
(d) refraction of light

Answer : B

Question. The cause of dispersion of light is
(a) All the colours of light travel with the speed more than the speed of light.
(b) All the colours have same angles of deviation.
(c) All the colours do not travel with the same speed of light.
(d) All the colours have the same wavelength.

Answer : C

Question. In nature, this phenomenon is observed in
(a) formation of rainbow
(b) twinkling of stars
(c) blue colour of sky
(d) advance sunrise

Answer : A

III. Sunaina, a class X student prepare a project on human respiratory system. She draws a diagram of human respiratory system but forgot to label it.
Study the diagram and answer the questions. 

Question. Which of these is the function of balloon like structure present in lungs?
(a) Exchange of gases
(b) Absorption of nutrients
(c) Transport of food
(d) Removal of waste materials

Answer : A

Question. The balloon like structures present in ‘S’ is:
(a) Nephron
(b) Alveoli
(c) Bronchi
(d) Bronchiole

Answer : B

Question. Trachea is divided into two smaller tubes called ...........
(a) Bronchi
(b) Bronchioles
(c) Larynx
(d) Alveoli

Answer : A

Question. Which of these organs is surrounded by cartilaginous rings?
(a) P
(b) Q
(c) R
(d) S

Answer : C