CBSE Class 10 Science Boards 2021 Sample Paper Solved

SECTION A
No. Questions Marks
1 List any two observations when Ferrous Sulphate is heated in a dry test tube?
OR
Identify the products formed when 1 mL of dil. Hydrochloric acid is added to 1g of Sodium metal?
 
2 Write the chemical name and chemical formula of the salt used to remove permanent hardness of water.
 
3 Which of the following is not observed in a homologous series? Give reason for your choice.
 
a) Change in chemical properties
 
b) Difference in -CH2 and 14u molecular mass
 
c) Gradation in physical properties
 
d) Same functional group
 
4 Why does the Sun appear white at noon?
 
5 Both a spherical mirror and a thin spherical lens have a focal length of (-)15 cm. What type of mirror and lens are these?
 
6 The image formed by a concave mirror is observed to be real, inverted and larger than the object. Where is the object placed?
OR
Name the part of a lens through which a ray of light passes without suffering any deviation.
 
7 In the arrangement shown in figure there are two coils wound on a nonconducting cylindrical rod. Initially the key is not inserted in the circuit. Later the key is inserted and then removed shortly after.
 CBSE Class 10 Science Boards 2021 Sample Paper Solved
8 Draw the magnetic field lines around a straight current carrying conductor. 
 
9 Two unequal resistances are connected in parallel. If you are not provided with any other parameters (eg. numerical values of I and R), what can be said about the voltage drop across the two resistors?
OR
Some work is done to move a charge Q from infinity to a point A in space. The potential of the point A is given as V. What is the work done to move this charge from infinity in terms of Q and V?
 
10 Veins are thin walled and have valves. Justify.
 
11 How is the wall of small intestine adapted for performing the function of absorption of food?
OR
Out of a goat and a tiger, which one will have a longer small intestine? Justify your answer.
 
12 Explain how ozone being a deadly poison can still perform an essential function for our environment.
OR
Give reason why a food chain cannot have more than four trophic levels.
 
Please click on below link to download CBSE Class 10 Science Boards 2021 Sample Paper Solved.

Tags: 

 


Click to View or Download pdf file
Click for more Science Study Material

Latest NCERT & CBSE News

Read the latest news and announcements from NCERT and CBSE below. Important updates relating to your studies which will help you to keep yourself updated with latest happenings in school level education. Keep yourself updated with all latest news and also read articles from teachers which will help you to improve your studies, increase motivation level and promote faster learning

SOF IMO International Mathematics Olympiad

SOF IMO refers to the International Mathematics Olympiad organised by SOF, the Science Olympiad Foundation. SOF is the educational foundation involved in the academic upgradation of students. This Olympiad is a maths competitive examination conducted for the aspiring...

CBSE Practical Exams for Class 10 and 12

As per the Scheme of Examination, Practical Examination/Project/Internal Assessment is a compulsory activity which is completed by schools every year. Till last year, the window for Practical Examinations was provided from 1st January to 7th February. However, this...

Celebration of Republic Day by CBSE

As you are aware, Republic Day is celebrated every year on 26th January to honour the Constitution and Republic of our country. Celebration of this occasion annually helps youth and children of our country to be aware of the significance of Indian Constitution, unity...

Board Exams Datesheet Class 10 and Class 12

Board Exams Datesheet Class 10 and Class 12 Class 10 Datesheet for Boards Class 12 Datesheet for Board Exams

SOF Science Olympiad Foundation

SOF~ The most desired name for Olympiads in the Educational World! SOF” refers to the Science Olympiad Foundation. It is an Academic Institution assisting educational based competition and enhancing competitive spirit among the School- Level students. The Science...

Storytelling Competition by CBSE

During the COVID-19, humanity has faced various situations that invoke human interest. There are stories of innovation, sacrifice, going beyond the call of duty, challenges faced and creatively solved, humour, finding joy in adversity etc. It will be highly useful to...

×
Studies Today