Class 10 Science Sample Paper Term 1 With Solutions Set D

Please refer to Class 10 Science Sample Paper Term 1 With Solutions Set D below. These Class 10 Science Sample Papers will help you to get more understanding of the type of questions expected in the upcoming exams. All sample guess papers for Science Class 10 have been designed as per the latest examination pattern issued by CBSE. Please practice all Term 1 CBSE Sample Papers for Science in Standard 10.

Sample Paper Term 1 Class 10 Science With Solutions Set D

Question. A chemical reaction does not involve:
(a) Formation of new substances having entirely different properties than that of the reactants
(b) Breaking of old chemical bonds and formation of new chemical bonds
(c) Rearrangement of the atoms of reactants to form new products
(d) Changing of the atoms of an element into those of another element to form new products

Question. If we take food rich in lime juice, then
(a) action of ptyalin on starch is enhanced
(b) action of ptyalin on starch is reduced
(c) action of ptyalin on starch is unaffected
(d) action of ptyalin on starch stops

Question. The non-metal which is liquid at room temperature is:
(a) Mercury
(b) Bromine
(c) Carbon
(d) Helium

Question. When a beam of white light falls on a glass prism, the colour of light which will deviate least is:
(a) Violet
(b) Red
(c) Green
(d) Blue

Question. Sometimes we get painful cramps in our leg muscles after running for a long time due to the accumulation of:
(a) HCl
(b) Fat
(c) Carbon dioxide
(d) Lactic acid

Question. Sodium hydrogen carbonate when added to acetic acid evolves a gas. Which of the following statements are true about the gas evolved?
(i) It turns lime water milky
(ii) It extinguishes a burning splinter
(iii) It dissolves in a solution of sodium hydroxide
(iv) It has a pungent odour
(a) (i) and (ii)
(b) (i), (ii) and (iii)
(c) (ii), (iii) and (iv)
(d) (i) and (iv)

Question. In a spectrum of light the colour that has the least wavelength is –
(a) Red
(b) Violet
(c) Green
(d) Yellow

Question. The arrangement of cells inside the leaf of a green plant is shown in the given diagram. Which cells normally contain chloroplast?

(a) A and C
(b) B and D
(c) A, C and D
(d) All of these

Question. All the methods mentioned below can be used to prevent the food from getting rancid except:
I. Storing the food in the air-tight containers
II. Storing the food in refrigerator
III. Keeping the food in clean and covered containers
IV. Always touching the food with clean hands
(a) I and II
(b) I and III
(c) I, III and IV
(d) III and IV

Question. One of the following processes does not involve a chemical reaction. That is:
(a) Melting of candle wax when heated
(b) Burning of candle wax when heated
(c) Digestion of food in our stomach
(d) Ripening of banana

Question. The liquid waste product of plants formed due to oxidation of various essential oil is
(a) gums
(b) latex
(c) resins
(d) tannins

Question. You are given the following chemical reaction:
CuO + H₂^Heat → Cu + HO This reaction represents:
(a) Combination reaction as well as double displacement reaction
(b) Redox reaction as well as displacement reaction
(c) Double displacement reaction as well as redox reaction
(d) Decomposition reaction as well as displacement reaction

Question. Which of the following lenses would you prefer to use while reading small letters found in a dictionary?
(a) A convex lens of focal length 50 cm.
(b) A concave lens of focal length 50 cm.
(c) A convex lens of focal length 5 cm.
(d) A concave lens of focal length 5 cm.

Question. The blood plasma without fibrinogen is called
(a) serum
(b) bone marrow
(c) liquid tissue
(d) none of these.

Question. Where does aerobic respiration occur in a cell?
(a) Mitochondria
(b) Cytoplasm
(c) Nucleus
(d) Plastid

Question. The diagram represents a section through the small intestine. What is the role of the structure labelled X ?

(a) They help to move the food along
(b) They make a large surface area for absorption
(c) They protect against bacteria
(d) They move mucus over the surface

Question. An experiment is set up as shown. Flasks 1 and 2 contain lime water. Air is pumped through the flasks.

What is the appearance of lime water in flasks 1 and 2 after a period of ten minutes?

Question. A sample of soil is mixed with water and allowed to settle. The clear supernatant solution turns the pH paper yellowish-orange. Which of the following would change the colour of this pH paper to greenish-blue?
(a) Lemon juice
(b) Vinegar
(c) Common salt
(d) An antacid

Question. The gas produced when dil. HCl is added to a reactive metal:
(a) Oxygen
(b) Nitrogen
(c) Hydrogen
(d) None of these.

Question. One of the constituents of baking powder is sodium hydrogen carbonate, the other constituent is
(a) hydrochloric acid
(b) tartaric acid
(c) acetic acid
(d) sulphuric acid

Question. Sodium carbonate is a basic salt because it is a salt of
(a) strong acid and strong base.
(b) weak acid and weak base.
(c) strong acid and weak base.
(d) weak acid and strong base.

Question. Which of the following help in protecting the inner lining of the stomach from the harmful effect of hydrochloric acid?
(a) Mucus
(b) Pepsin
(c) Trypsin
(d) Bile

Question. Twinkling of stars is a phenomenon that occurs due to
(a) Refraction
(b) Reflection
(c) Varying conditions of the earth’s atmosphere
(d) (a) and (c).

Question. Which of the following substance will not give carbon dioxide on treatment with dilute acid?
(a) Marble
(b) Limestone
(c) Baking soda
(d) Lime

Question. Blue colour of the sky is due to the phenomenon of:
(a) Reflection of light
(b) Refraction of light
(c) Dispersion of light
(d) Scattering of light

Question. An object is placed 20 cm in front of a plane mirror. The mirror is moved 2 cm towards the object. The distance between the positions of the original and final images seen in the mirror is:
(a) 2 cm
(b) 4 cm
(c) 10 cm
(d) 22 cm

Question. Which position of the object will produce a magnified virtual image, if a concave mirror of focal length 15 cm is being used? 
(a) 10 cm
(b) 20 cm
(c) 30 cm
(d) 35 cm

Question. An element X is soft and can be cut with the help of a knife. It is very reactive to air and cannot be kept open in the air. It reacts vigorously with water. Identify the element from the following:
(a) Mg
(b) Na
(c) P
(d) Ca

Question. At noon the sun appears white as
(a) light is least scattered
(b) all the colours of the white light are scattered away
(c) blue colour is scattered the most
(d) red colour is scattered the most

Question. Which of the following statements is correct about an aqueous solution of an acid and of a base?
I. Higher the pH, stronger the acid
II. Higher the pH, weaker the acid
III. Lower the pH, stronger the base
IV. Lower the pH, weaker the base
(a) I and III
(b) II and III
(c) I and IV
(d) II and IV

Question. In which of the following cases will no dispersion take place when sunlight passes through it?

Question. A convex lens A of focal length 20 cm and a concave lens B of focal length 5 cm are kept along the same axis with a distance d between them. If a parallel beam of light falling on A leaves B as a parallel beam, then the distance d in cm will be
(a) 25
(b) 15
(c) 30
(d) 50

Question. Which of the following statements is not correct?
(a) All metal carbonates react with acid to give a salt, water and carbon dioxide
(b) All metal oxides react with water to give salt and acid
(c) Some metals react with acids to give salt and hydrogen
(d) Some non metal oxides react with water to form an acid

Question. The neutralization reaction between an acid and a base is a type of:
(a) Double displacement reaction
(b) Displacement reaction
(c) Addition reaction
(d) Decomposition reaction

Question. Which of the following pairs of reactants will undergo a displacement reaction?
(a) CuSO₄ + Fe
(b) ZnSO₄ + Fe
(c) MgSO₄ + Fe
(d) Ca(SO4)2 + Fe

Question. A concave mirror produces a magnification of +4. The object is placed:
(a) At the focus
(b) Between focus and centre of curvature
(c) Between focus and pole
(d) Beyond the centre of curvature

Question. Which of the following represent the correct order of decreasing reactivity?
(a) Mg > Al > Zn > Fe
(b) Mg > Zn > Al > Fe
(c) Al > Zn > Fe > Mg
(d) Mg > Fe > Zn > Al

Question. A man is 6.0 ft tall. What is the smallest size plane mirror he can use to see his entire image
(a) 3.0 ft
(b) 6.0 ft
(c) 12 ft
(d) 24 ft

Question. Which of the following phenomena of light are involved in the formation of a rainbow?
(a) Reflection, refraction and dispersion
(b) Refraction, dispersion and total internal reflection
(c) Refraction, dispersion and internal reflection
(d) Dispersion, scattering and total internal reflection

Question. Common salt besides being used in kitchen can also be used as the raw material for making I. Washing Soda II. Bleaching powder III. Baking soda IV. Slaked lime
(a) I and II
(b) I, II and IV
(c) I and III
(d) I, III and IV

Question. Match Group (A) with Group (B)

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

Question. A prism ABC (with BC as base) is placed in different orientations. A narrow beam of white light is incident on the prism as shown in the given figures. In which of the following cases, after dispersion, the third colour from the top corresponds to the colour of the sky?

(a) I
(b) II
(c) III
(d) IV

Question. Movement of the synthesized products from the leaves to the roots and other parts of a plant’s body takes place through the phloem. This process is known as:
(a) Translocation
(b) Transpiration
(c) Transportation
(d) Excretion

Question. An object is placed 40.0 cm in front of a convex mirror. The image appears 15 cm behind the mirror. What is the focal length of the mirror?
(a) +24 cm
(b) +11 cm
(c) –11 cm
(d) –24 cm

(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: White silver chloride turns grey in sunlight.
Reason: Decomposition of silver chloride in presence of sunlight takes place to form silver metal and chlorine gas.

Question. Assertion: Translocation of sugar occurs through the phloem.
Reason: It is achieved by diffusion of sugars through phloem.

Question. Assertion: Carbonic acid is weak acid.
Reason: It is ionized completely in aqueous solution.

Question. Assertion: Refractive index is a quantity which does not have any unit.
Reason: Refractive index is the ratio of two similar quantities.

I. A teacher draws a flow chart depicting various processes of conversion of carbohydrate into energy. Study the given flow chart and answer the following questions.

Question. In which of these organisms the process Z takes place?
(a) Bacteria
(b) Humans
(c) Yeast
(d) Spirogyra

Question. In which part of human body do the process Z takes place?
(a) In muscle cells
(b) In kidneys
(c) In liver cells
(d) In leydig’s cell

Question. Identify X, Y and Z.
(a) X-Glycolysis, Y-Anaerobic, Z-Aerobic
(b) X-Kreb’s cycle, Y-Aerobic, Z-Anaerobic
(c) X-Glycolysis, Y-Aerobic, Z-Anaerobic
(d) X-Glycolysis, Y-Aerobic, Z-Kreb’s cycle

Question. The process X occurs in …………… and Y occurs in …………… part of cell.
(a) Mitochondria and cytoplasm respectively.
(b) Cytoplasm and mitochondria respectively.
(c) Both takes place in cytoplasm.
(d) Both takes place in mitochondria.

II. A student took the samples of four metals A, B, C and D and added the following solutions one by one. The results obtained have been tabulated as follows:

Question. Which is the correct decreasing order of reactivity?
(a) B > A > C > D
(b) A > B > D > C
(c) D > B > A > C
(d) B > A > D > C

Question. On the basis of sequence of reactions, identify the most and least reactive elements.
A + BX → AX + B
C + AY → CY + A
(a) Most reactive: C; Least reactive: B
(b) Most reactive: B; Least reactive: C
(c) Most reactive: A; Least reactive: B
(d) Most reactive: B; Least reactive: A

Question. Choose the most reactive metal:
(a) A
(b) B
(c) C
(d) D

Question. Which of the following will displace Cu from its solution of sulphate?
(a) A only
(b) B only
(c) Both A and B
(d) None of these.

III. Light is a form of energy which induces sensation of vision to our eyes. It becomes visible when it bounces off on surfaces and hits our eyes. The phenomenon of bouncing back of light rays in the same medium on striking a smooth surface is called reflection of light.

If parallel beam of incident rays remains parallel even after reflection and goes only in one direction is known as regular reflection. It takes place mostly in plane mirrors or highly polished metal surface. The mirror outside the driver side of a vehicle is usually a spherical mirror and printed on such a mirror is usually the warning ‘‘vehicles in this mirror are closer than they appear.’’

Question. The focal length of mirror is 12 cm. The radius of curvature is
(a) 12 cm
(b) 24 cm
(c) 20 cm
(d) 36 cm

Question. Which type of mirror is used outside the driver’s side of a vehicle?
(a) Plane mirror
(b) Concave mirror
(c) Convex mirror
(d) Magic mirror

Question. Which of the following diagrams represents the image formation in above case?

Question. No matter how far you stand from a mirror, your image appears erect. The mirror can be
(a) Plane
(b) Concave
(c) Convex
(d) Either plane or convex