CBSE Class 9 Science Sample Paper Set 68

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Official CBSE Practice Papers for Class 9 Science

Explore authentic exam practice materials through the CBSE Class 9 Science Sample Paper Set 68. Tailored for Class 9 learners, utilizing these Science sample papers ensures thorough preparation and strengthens time management skills before final CBSE evaluations.

Solved Model Papers for Science

View or download the dedicated CBSE Class 9 Science Sample Paper Set 68 resource below. Engaging with these sample papers under timed conditions ensures continuous academic progress and mastery of the 2026-27 exam format.

SECTION - A

Q.1 Write the symbols of phosphorus and potassium. 

Q.2 Name two groups of micro – organisms from which antibiotics could be extracted. 

Q.3 State the term used to describe bits of decayed living organisms present in soil. 

Q.4 Discover similarity between (i) frog and funaria and (ii) pinus and rice on the basis of your knowledge about diverse life forms. 

Q.5 Define negative work. Give two examples where negative work is done ? 

Q.6 Derive a relation between kinetic energy and momentum ‘p’ of an object having mass ‘m’ and moving with velocity ‘v’.

Q.7 (a) Do isobars belong to the same element ? Justify your answer by giving one example.

(b) Name two elements whose isotopes are used in the field of medicine. 

Q.8 List the observations in a-particle scattering experiment which led Rutherford to make the following conclusions :

(i) Most of the space in an atom is empty.

(ii) Whole mass of an atom is concentrated in its centre.

(iii) Centre is positively charged. 

Q.9 State any four postulates of Dalton’s atomic theory of matter. Which of his postulates does not hold correct at present ?

Q.10 Rohan and Prateek were discussing about the vaccination. Rohan was afraid of vaccines. According to him vaccines are very dangerous because these contain germs. Prateek explained that there is nothing to worry and Vaccines are lifesaving preventive measures and the new borns should be vaccinated as per the schedule.

Answer the following questions :
(i) Name two diseases for which vaccines are given.
(ii) What is a vaccine ?
(iii) Why Prateek removed the fear of Rohan ?
 
Q.11 An organism ‘A’ has a notochord, a dorsal nerve cord and is triploblastic, coelomate.
(i) State the phylum of ‘A’.
(ii) State the class of ‘A’, if it is warm blooded and gives birth to young ones.
(iii) How many chambers are there in its heart ?
 
Q.12 State what is the outer ear called. Explain its function. Which has smaller wave amplitude - soft sound or loud sound?
 
Q.13 What is reverberation? How can it be reduced? Give two applications of reflection of sound wave.
 
Q.14 An object with 100 N weight is raised to a height of 15 m. Find the potential energy possessed by the object at that height. Also find the new potential energy :
(a) if the same object is raised half of its original height.
(b) if the same object is raised to three times of its original height.
 
Q.15 (a) Define Power. Write its SI unit.
(b) Compute the power required by a man to move a 10 kg mass so as to change the speed of mass from 10 m/s to 20 m/s in 5 sec.
 
Q.16 State, what are the waves of frequency greater than 20,000 Hz called ? Explain any two applications of these waves.
 
Q.17 Define the term “biosphere”. Write its two components. 
Q.18 State the role of plants in preventing soil erosion ? 
Q.19 Write the names of the following compounds :
(a) Ca3(PO4)2
(b) KHCO3
(c) NH4 Cl
(d) Fe (OH)2
(e) CuS
 
Q.20 (a) What do signs and symptoms indicate if a person is suffering from any disease ?
(b) Based on the duration of disease what are the different categories of diseases ?
Differentiate between them with one example each.
 
Q.21 Explain the following statements :
(a) Being disease free, is not the same as being healthy.
(b) Community health is essential for good individual health.
(c) Villagers suffer with cholera more than urban people.

 

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Download Sample Paper: CBSE Class 9 Science Sample Paper Set 68 (Class 9 Science)

Access structured sample papers for Class 9 Science. Solving the CBSE Class 9 Science Sample Paper Set 68 provided above helps students understand official exam blueprints and tackle anticipated question formats with confidence.

Why Practice Class 9 Science Sample Papers?

  • Original Practice Material: Access unique questions for Science designed to challenge your understanding.
  • Self-Assessment: Evaluate scores per set to pinpoint weak zones in Class 9 Science.
  • Exam Completion Skills: Routine problem sets train you to manage test duration efficiently without stress.

Steps to Follow After Completing CBSE Class 9 Science Sample Paper Set 68

  1. Review Solutions: Evaluate your completed papers using expert-verified guidance inside our solution sets.
  2. Target Weaknesses: Class 9 students should analyze missed questions to rectify conceptual misunderstandings.
  3. Deep Revision: Re-read sections in the NCERT book for Class 9 Science to clear doubts before solving items again.

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How can practicing CBSE Class 9 Science Sample Paper Set 68 help in exam preparation?

Practicing this Science paper helps in time management and identifying important topics. For Class 9, solving mock papers is the best way to gain confidence and reduce exam-day anxiety.

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