SAMPLE QUESTION PAPER
Subject : SCIENCE (033)
Class : 10th
Time : 3 Hours Max. Marks : 80
There are 27 questions in this paper. All questions are Compulsory.
Marks allotted to the question are mentioned against them.
Read each question carefully and answer to the point.
Question No.1 is multiple choice question. Four options are given in answer of each part of the question. Write correct option in your answer book.
Question No. 2 is related to Assertion/Reason type question. Four options are given in answer of each part of the question. Write correct option in your answer book.
Each part of question No. 1 and question no.2 carries one (1) mark. Question no. 3 to 6 is of one (1) mark each. Question No.7 to 12 is of two (2) marks each. Question no.13 to 20 are of three marks (3) each. Question No. 21 to 26 are of four marks (4) each. Question no. 27 related to case study question carries 4 marks (1+1+2).
There is no overall choice in this question paper, however an internal choice has been provided in few questions. Attempt only one of the given choices in such questions.
( Section – A )
a) Which of these non-metals is a good conductor of electricity?
i) Sulphur ( ) ii) Phosphorus ( ) iii) Graphite ( ) ( iv) Chlorine ( )
b) Which of Mendel’s principal accounts for the appearance of recessive traits in the second filial generation (F2)?
i) Law of Dominance ( ) ii) Law of Segregation ( )
iii) Law of Independent Assortment ( ) iv) Law of Inheritance ( )
c) Which of the following chromosome combinations will produce girl child in humans?
i) XX ( ) ii) XY ( ) iii) YY ( ) iv) X/Y ( )
d) When white light passes through a prism, it is dispersed into seven colors, which colour will deviate the most?
i) Red ( ) ii) Blue ( ) iii) Green ( ) iv) Violet ( )
e) Which of the following solutions will turn blue litmus red?
i) Sodium chloride ( ) ii) Potassium hydroxide ( )
ii) Hydro-chloric acid i( ) iv) Sodium carbonate ( )
f) Which part of the human eye controls the amount of light entering?
i) Retina ( ) ii) Lens ( ) iii) Iris ( ) iv) Optic nerve ( )
g) SI Unit of Electrical resistivity-
i) Ωm-3 ( ) ii) Ωm-1 ( ) iii) Ωm-2 ( ) iv) Ωm ( )
h) If a virtual, erect, and magnified image of an object is formed by a concave mirror. Where is the object located?
i) Between the principle focus and center of curvature
ii) At the center of curvature
iii) Behind the center of curvature
iv) Between the pole of the mirror and principle focus
i) The main source of energy in a biosphere is –
i) Air ( ) ii) Sun ( ) iii) Plants ( ) iv)Atomic energy ( )
j) Which human activity can cause the highest level of ozone layer depletion?
i) Use of electric vehicles ( ) ii) Increased CFC emission ( )
ii) Rainwater harvesting ( ) iv) Afforestation ( )
k) There are two statements given below, one as Assertion (A) and the other labeled as Reason(R). Select the correct answer to these questions from the given four options below.
Assertion (A): Magnesium ribbon should be cleaned before burning in air.
Reason: – (R) The oxide layer formed on the surface of magnesium ribbon prevent it from burning.
a) Both A and R are true and R is the correct explanation of A.
b) Both A and R are true but R is the not the correct explanation of A.
c) Assertion (A) is true, but Reason (R) is false.
d) Assertion (A) is false , but Reason (R) is true.
Assertion (A) : Household electric circuits are wired in parallel.
Reason (R) : In a parallel circuit, each appliance receives the same voltage, and if one device fails, others continue to work.
a) Both A and R are true and R is the correct explanation of A.
b) Both A and R are true but R is the not the correct explanation of A.
c) Assertion (A) is true, but Reason (R) is false.
d) Assertion (A) is false , but Reason (R) is true.
2.Write the chemical name and formula of washing soda.
3.What process do plants use to make their own food?
4.What is the power of a concave lens of focal length 50 cm?
5.Name the process by which harmful substances enter the food chain and their concentration increases at higher tropic levels?
6.Explain why-
a) Sodium is stored under kerosene.
b) Aluminum forms hard protective layer on its surface.
7.How can ethanol be converted to Ethanoic acid? Write the reaction.
8.Describe any two methods of asexual reproduction in organisms.
9.How do family planning methods help in controlling the population?
( Section – B )
10.A child, while playing with his father’s spectacles, burnt a hole in a piece of paper by focusing a small image of the sun on it-
a) What defect of vision is his father suffering from?
b) Explain the correction of this defect with a ray diagram.
11.What will be the power of the combination formed, by combining two lenses with power +2.5D and -1.5D?
OR
Why does the sky appear blue from the surface of earth? What will be the colour of the sky for an astronaut in a space station? Give reason.
12.A student took a small amount of lead nitrate in a test tube and heated it gently. He observed the evolution of brown fumes and a yellow residue was left in the test tube.
a) Write the balanced chemical equation for this reaction.
b) Name the type of chemical reaction taking place.
c) Identify the brown fumes and yellow residue.
13.A piece of iron was left in the open for some days. A brown layer was observed on it. Identify the phenomenon; write the chemical formula of the new product. Explain how it can be prevented.
14.Draw the electron dot structure for-
a) Methane b) Ethane (c) Ethyne d) propanyl
15.Draw a neat and clean labeled diagram of the human heart showing the flow of oxygenated and de-oxygenated blood using arrows.
OR
Draw a neat diagram of the human endocrine system and mark the answer only in the diagram.
a) A boy grows very tall, which gland is overactive?
b) A woman gains weight, feels tired and has swelling in her neck. Which gland is affected?
c) A man’s heart beat increases suddenly due to fear. Which gland is active?
16.a) When a pure breed tall pea plant is crossed with a pure bred dwarf plant, all the offspring’s resembled one parent i.e., tall pea plant. What might be the reason for this? Explain With the help of a neat genetic diagram, show the possible offspring in F2 generation.
b) A house has 10 LED bulbs rated 10 W each, used 5 hours per day and 5 tube lights rated 40W each, used 4 hours per day.
17.The supply voltage is 220V. Answer the following-
a) Calculate the total energy consumed per day in kilowatt-hours (KWh).
b) Find the total current drawn by all bulbs when all the appliances are operating together.
c) A fuse rated 2 A will be effective or not. Give reason.
18. a)What will be the effect on the magnetic field if the current in a solenoid is reversed? Explain and Give one practical application of this principle.
b)Non-biodegradable substances cause more harm to the environment than biodegradable substances? Support your answer with an example.
c) What term is used for organisms that feed on dead and decaying matter?
19.Write the chemical equation for the following reaction and identify the type of reaction.
a) Action of heating on ammonium chloride.
b) Reaction of calcium oxide with water.
c) Heating of gypsum.
d) On putting an iron nail in a solution of copper sulphate.
OR
a) Write the general formula of alkanes, alkenes and alkynes.
b) Draw the structural formula of the first member of alkane’s series.
c) Why alkanes are called saturated hydrocarbons?
d) How can an alkene be converted to an alkane?
( Section – C )
20. a) Why do herbivores have a longer small intestine compared to carnivores? Explain with reasoning.
b) A doctor has advised Sohan to reduce sugar intake in his diet and do regular exercise after checking his blood test reports.
- Which disease do you think Sohan is suffering from?
- Name the hormone responsible for this disease and the gland producing the hormone.
21.a) Elucidated the steps involved in the sexual reproduction of flowering plants. Support your answer with a well labeled diagram of a bisexual flower showing key reproductive organs.
b) Discuss the significance of pollination and fertilization in the formation of a seed.
OR
a) Name the process by which Amoeba and Hydra reproduce. Distinguish between these modes of reproduction.
b) Explain the role of the following enzymes in the process of digestion of food in humans-
i) Pepsin ii) Lipase iii) Trypsin iv) Salivary amylase
22.Study the circuit and find out –
a) Total resistance of the circuit.
b) Current flowing through 12 Ω resistor.
c) Is there any difference in the readings of ammeter A1 and A2 ?If any than what is it?
OR
a) What are magnetic field lines? Justify the following statements –
i) Two magnetic field lines never intersect each other.
ii) Magnetic field lines are closed curves.
b) Name four devices where current carrying conductors and magnetic fields are used along with them.
23.Name the device (type of lens/ mirror) used in the following cases and draw ray diagrams to show the image formation in each case-
a) Object is placed between the device (lens/mirror) and its focus, the enlarged image is formed behind the device.
b) Object is placed between the focus and device, enlarged image formed on the same side as that of an object.
OR
An object of 5.0 cm in size is placed 24 cm in front of a concave mirror of focal length 16 cm. At what distance from mirror should a screen be placed in order to obtain a sharp image?Also find size and nature of the image.
24. A science teacher conducted an experiment with potted plant. Part A of an leaf was enclosed in a jar containing soda lime and part B of same leaf was left in the open air. The pot was exposed in bright sunlight for several hours. Afterwards, the teacher applied the iodine test to both parts of that leaf. Part B turned blue–black, but part A did not.
a) Which gas required during photosynthesis is absorbed by soda lime?
b) Why did part B turn blue- black after the iodine test?
c) What is the role of this gas in the process of photosynthesis?
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This science sample paper has consisting NCERT based questions for your Board Exams practice.
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