Class 10 Science Board Exam Paper 2023 { Expected }

Class 10 Science Board Exam Paper 2023

Expected Class 10 Science Board Question Paper 2023: The CBSE Class 10 Science Examination will be held on March 4, 2023. Therefore now is a key moment to enhance our Class 10 Science Test result. Students should practice the Sample question papers for Science as often as possible; this will help them face the questions in the examination hall.

CBSE Class 10 Science Answer Key 2023

CBSE Class 10 Science Additional Practice Question Paper 2023

Science Class 10 Board Exam Paper Full Revision

Our Adda247 Expert faculty prepares the Expected expected Class 10 Board Science Exam Paper 2023 for the benefit of class 10 candidates, which is based on the genuine Cbse Class 10 Exam pattern. Students who are planning to do class 10 must take the Expected Class 10 Board Science Exam Paper 2023.

CBSE Class 10 Science Syllabus 2022-23

Science Class 10 Board Exam Paper 2023- Expected

Adda247’s Class 10 Board Science Exam Paper 2023, like the official CBSE Class 10 Science sample paper, has 39 questions in 5 sections for an overall score of 80. check the mark distribution for the Class 10 Board Science Exam Paper 2023 below.

CBSE Class 10 Science Important Topics – You Should Not Miss in Board Exam 2023

•  Section A consists of 20 objective-type questions carrying 1 mark each.
• Section B consists of 6 Very Short questions carrying 02 marks each. Answers to these
  questions should in the range of 30 to 50 words.
• Section C consists of 7 Short Answer type questions carrying 03 marks each. Answers to these questions should in the range of 50 to 80 words
• Section D consists of 3 Long Answer type questions carrying 05 marks each. Answers to these questions should be in the range of 80 to 120 words.
• Section E consists of 3 source-based/case-based units of assessment of 04 marks each with sub-parts.

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Expected Class 10 Board Science Exam Paper 2023 Section A

SECTION – A

Select and write one most appropriate option out of the four options given for each of the questions 1 – 20.Each Questions carries 1 Mark.

Q1 A complete circuit is left on for several minutes, causing the connecting copper wire to become hot. As the temperature of the wire increases, the electrical resistance of the wire
(a) Increases
(b) Decreases
(c) Remains constant
(d) None of the above

Q2 Carbon atom attains its stability by sharing its valance electron in covalent bond sharing. The number of electrons that the carbon atom shares is/are
(a) 1
(b) 2
(c) 3
(d) 4

Q3 Diksha was playing with her friend Pragati with some wires, batteries, and a magnetic compass. Pragati was trying to find the direction of the magnetic north of the Earth so she put the compass on the ground steadily but Diksha connects a battery to the wire and put the wire over the compass. The compass deflects from the magnetic north of the Earth. The reason was

(a) Magnetic effect due to current carrying wire
(b) Gravitational effect due to current carrying wire
(c) Electric effect due to current carrying wire
(d) Mechanical effect due to current carrying wire

Q4 Name a device that helps to maintain a potential difference across a conductor.
(a) Ammeter
(b) Voltmeter
(c) Cell
(d) Resistor

Q5 Fe2O3 + 2Al —-→ Al2O3 + 2Fe
The above reaction is an example of an
(a) combination reaction.
(b) double displacement reaction.
(c) decomposition reaction.
(d) displacement reaction.

Q6 Food is synthesized from simple inorganic raw materials such as CO2 and water.
(a) Heterotrophic Nutrition
(b) Autotrophic Nutrition
(c) Both (a) and (b)
(d) neither (a) nor (b)

Q7

This is a structure of
(a) Sulphur Molecule
(b) Carbon Molecule
(c) Iron molecule
(d) Helium molecule

Q8 The number of isomeric structures are possible for Bromopentane
(a) 1
(b) 3
(c) 8
(d) 4

Q9 The sex chromosomes present in a female gamete is
(a) XX
(b) XY
(c) YY
(d) YZ

Q10 Sunita was trying to measure the resistance of a wire using a very sensitive reading device. She measures it and finds that the resistance of the wire is 1Ω. Her friend took that wire and stretched it so its length increases as well as its diameter decreases. The resistance of the wire has become
(a) More than 1Ω
(b) Less than 1Ω
(c) Equal to 1Ω
(d) 100 Ω

Q11 Mirrors used by dentists and for makeup are
(a) Concave, Convex
(b) Convex, Concave
(c) Concave, Concave
(d) Convex, Convex

Q12 A ray of light is passing through the centre of curvature gets reflected along the same path. The mirror is used in this case is
(a) Convex
(b) Concave
(c) Plane
(d) It’s a lens

Q13 When resistors of same value are joined in parallel combination, the total resistance value of the construction will
(a) Increase
(b) Remains constant
(c) Decrease
(d) Increase then decrease

Q14 The resistance of an ideal Ammeter and a Voltmeter is
(a) 0Ω ,∞Ω
(b) ∞Ω, 0Ω
(c) 0Ω ,0Ω
(d) ∞Ω,∞Ω

Q15 The formation of sperms in testes and ova is called
(a) Ovulation
(b) Gametogenesis
(c) Fertilization
(d) None of the above

Q16 Involuntary actions controlled by the hindbrain are
(a) Vomiting
(b) Salvation
(c) Heart beat
(d) All of the above

Q17 The secretion of which hormone is responsible for the dramitic changes in appearance in girls when they hit puberty
(a) Oestrogen
(b) Testosterone
(c) Thyroid
(d) Spinal cord

Q18 When the leaf of a touch me not plant (Mimosa pudica) is touched, the electrical signal send signals from leaflets to pulvinars (petiole) of leaf. The movement due to the difference of turgidity of the cells is known as
(a) Relaxed movement
(b) Turgor Movement
(c) Stiff movement
(d) None of the above

Q19 When a white beam of light passed through a glass prism, it disperses into its constitute colours. The least and the most deviated lights are
(a) Red, Violet
(b) Violet, Red
(c) Red, Yellow
(d) Yellow, Green

Q20 Consider the following reaction Which of these two reactions will take place?

(a) Only (i) —
(b) Only (ii)
(c) Both (i) and (ii)
(d) Neither (I) nor (ii)

Science Sample Paper Class 10 2023 with Solutions

Class 10 Board Science Exam Paper 2023 -Section B

SECTION – B

Q. no. 21 to 26 are very short answer questions and Each Question carries 2 Marks

Q21 List three factors on which the resistance of a conductor depends.
Q22 Covalent compounds have low melting and boiling point. Why?
Q23 Draw ray diagrams for the following cases when a ray of light passing through center of curvature of a concave mirror is incident on it.

Q24 List any two steps involved in sexual reproduction and write its two advantage.
Q25 State the reason why carbon can neither form C4+ cations nor C4- anions, but forms covalent compounds.

Q26 Write one point of difference between a hydrated salt and an anhydrous salt.

Class 10 Science Board Expected Test Paper 2023 Section C

SECTION – C

Q. no. 27 to 33 are short answer questions. Each Question carries 3 marks

Q27 State the changes that take place in the uterus when:
(a) Implantation of embryo has occurred.
(b) Female gamete/egg is not fertilised.

Q28 State three factors on which the strength of magnetic field produced by a current carrying solenoid depends.

Q29 What is a gene? Explain heredity. All the variations in a species do not have equal chances of survival. Why?

Q30 Write the electronic configuration of two elements X and Y whose atomic numbers are 20 and 17 respectively. Write the molecular formula of the compound formed when element X reacts with element Y. Draw electron-dot of structure of the product and also state the nature of the bond formed between both the elements.

Q31 Write the function of each of the following parts of human eye:
(i) Cornea
(ii) Iris
(iii) Crystalline lens

Q32 What is water of crystallization? Write the common name and chemical formula of a commercially important compound which has ten water molecules as water of crystallization.

Q33 Design an activity to demonstrate that a bar magnet has a magnetic field around it.

Class 10 Board Science Exam Paper 2023-Section D

SECTION – D

Q. no. 34 to 36 are long answer questions. Each Question carries 4 marks

Q34 In the following food chain, plants provide 500 J of energy to rats. How much energy will be available to hawks from snakes? List two biotic components of a biosphere.

Q35 Soaps and detergents are both types of salts. State the difference between the two. Write the mechanism of the cleansing action of soaps. Why do soaps not form lather (foam) with hard water? Mention any two problems that arise due to the use of detergents instead of soaps.

Q36 List three techniques that have been developed to prevent pregnancy. Which one of these techniques is not meant for males? How does the use of these techniques have a direct impact on the health and prosperity of a family?

Science Class 10 Question Paper 2023-Section E

SECTION – E

Q. no. 37 to 39 are case–based/data-based questions with 2 to 3 short sub-
parts. Internal choice is provided in one of these sub-parts. Each Question carries 5 marks

Q37 Read the following and answer any four questions from ( i ) to (v)
In an experiment, a scientist removed some cells from the growing point of a plant and placed it a suitable medium containing nutrients and plant hormones leading to the formation of shapeless lump or mass called X. X is then transferred to another medium which lead to development of roots. X with developed roots is then transferred into another medium that induced the development of shoots. X in this way differentiated into tiny plantlets which were transplanted into pots where they grew into mature plants.
(i) What is X in the given paragraph?
(a) Plantlet
(b) Callus
(c) Embryoid
(d) Tissue
(ii) Which technique has the scientist used for propagation of plant ?
(a) Layering
(b) Grafting
(c) Tissue culture
(d) Cutting
(iii) What is the advantage of the technique mentioned in the paragraph ?
(a) It helps in production of disease free plant
(b) It Is very fast technique as thousands of plantlets can be produced in a few weeks of time.
(c) It is also known as micropropagation due to extremely small amount of plant material used for propagation.
(d) All of these
(iv) Select the incorrect statement regarding the propagation technique mentioned in the paragraph
(a) It is used in the production of ornamental plants like orchids, Carnation etc.
(b) It is a modern method of artificial propagation of plant
(c) Plants produced by this method are genetically different from the parent
plant
(d) Very little space is needed for developing new plants by this technique.

Q38 The heart is a muscular organ which is as big as our fist. Because both oxygen and carbon dioxide have to be transported by the blood, the heart has different chambers to prevent the oxygen-rich blood from mixing with the blood containing carbon dioxide. The carbon dioxide rich blood has to reach the lungs for the carbon dioxide to be removed, and the oxygenated blood from the lungs has to be brought back to the heart. This oxygen-rich blood is then
pumped to the rest of the body.

i) How many chambers are present in the heart of mammals and reptiles?
ii) Who carry deoxygenated blood from body to heart?
iii) What do you meant by the term double circulation?
iv) What is hypertension?
V) Which device measured blood pressure?

Q39 The electrical energy consumed by an electrical appliance is given by the product of its power rating and the time for which it is used. The SI unit of electrical energy is Joule. Actually, Joule represents a very small quantity of energy and therefore it is inconvenient to use where a large quantity of energy is involved. So for commercial purposes we use a bigger unit of electrical energy which is called kilowatt hour. 1 kilowatt-hour is equal to 3.6 x 106 joules of electrical energy.

(i) The energy dissipated by the heater is E. When the time of operating the heater is doubled, the energy dissipated is
(a) doubled
(b) half
(c) remains same
(d) four times
(ii) The power of a lamp is 60 W The energy consumed in 1 minute is
(a) 360J
(b) 36J
(c) 3600J
(d) 3.6 J
(iii) The electrical refrigerator rated 400 W operates 8 hours a day. The cost of electrical energy is ₹5 per kWh. Find the cost of running the refrigerator for one day?
(a) ₹32
(b) ₹16
(c) ₹8
(d) ₹4
(iv) Calculate the energy transformed by a 5 A current flowing through a resistor of 2Ω for 30 minutes?
(a) 90 kJ
(b) 80 kJ
(c) 60 kJ
(d) 40 kJ

Science Class 10 Board Question Paper 2023- With Solutions

We have also provided you with detailed solutions for Science Class 10 Board Question paper 2023. So, after solving the Expected Class 10 Board Science Exam Paper 2023, students can analyze their scores.

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