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CBSE Xth Science Model Paper

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Free Online Study Materials
(CBSE Xth Science Model Paper)

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Science Sample Paper

Section – A

 CBSE Xth Science Model Paper
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(CBSE Xth Science Model Paper)

Q1. A Mendelian experiment consisted of breeding pea plants bearing violet flowers with pea plants bearing white flowers. What will be the result in F1 progeny ? 01

Q2. Write the energy conversion that takes place in a hydropower plant. 01

Q3. A compound ‘X’ on heating with excess conc. sulphuric acid at 443 K gives an unsaturated compound ‘Y’. ‘X’ also reacts with sodium metal to evolve a colourless gas ‘Z’. Identify ‘X’, ‘Y’ and ‘Z’. Write the equation of the chemical reaction of formation of ‘Y’ and also write the role of sulphuric acid in the reaction. 02

Q4. (a) Name one gustatory receptor and one olfactory receptor present in human beings. 01

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Q5. If the image formed by a spherical mirror for all positions of the object placed in front of it is always erect and diminished, what type of mirror is it? Draw a labelled ray diagram to support your answer. 02

Q6. Decomposition reactions require energy either in the form of heat or light or electricity for breaking down the reactants. Write one equation each for decomposition reactions where energy is supplied in the form of heat, light and electricity. 03

Q7. The pH of a salt used to make tasty and crispy pakoras is 14. Identify the salt and write a chemical equation for its formation. List its two uses. 03

Online Study Mart is giving you the free access of study materials to school and college students. Now you can access model paper, previous year paper, notes and solutions at just one point.

Q8. (a) Why are most carbon compounds poor conductors of electricity ?
(b) Write the name and structure of a saturated compound in which the carbon atoms are arranged in a ring. Give the number of single bonds present in this compound. 03

Q9. Name the hormones secreted by the following endocrine glands and specify one function of each –

(a) Thyroid

(b) Pituitary

(c) Pancreas 03

Q10. Write one main difference between asexual and sexual mode of reproduction. Give reason to justify your answer. 03

 CBSE Xth Science Model Paper
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Q11. State the laws of refraction of light. Explain the term ‘absolute refractive index of a medium’ and write an expression to relate it with the speed of light in vacuum.
or
What is meant by power of a lens ? Write its SI unit. A student uses a lens of focal length 40 cm and another of –20 cm. Write the nature and power of each lens. 03

Q12. (a) Write Joule’s law of heating. 01
(b) Two lamps, one rated 100 W; 220 V, and the other 60 W; 220 V, are connected in parallel to electric mains supply. Find the current drawn by two bulbs from the line, if the supply voltage is 220 V. 02

Q13. (a) List the factors on which the resistance of a conductor in the shape of a wire depends. 01
(b) Why are metals good conductors of electricity whereas glass is a bad
conductor of electricity ? Give reason. 01
(c) Why are alloys commonly used in electrical heating devices ? Give reason. 01

Q14. What is a dam ? Why do we seek to build large dams ? While building large dams, which three main problems should particularly be addressed to maintain peace among local people ? Mention them. 03

Q15. Students in a school listened to the news read in the morning assembly that the mountain of garbage in Delhi, suddenly exploded and various vehicles got buried under it. Several people were also injured and there was traffic jam all around. In the brain storming session the teacher also discussed this issue and asked the students to find out a solution to the problem of garbage.

Finally they arrived at two main points
– one is self management of the garbage we produce and the second is to generate less garbage at individual level.
(a) Suggest two measures to manage the garbage we produce.
(b) As an individual, what can we do to generate the least garbage ? Give 2 points.
(c) List two values the teacher instilled in his students in this episode. 03

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for CBSE Xth English Sample Paper you can access : https://onlinestudymart.com/cbse-xth-sample-papers/

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