# CBSE Class 10 Science Sample Paper: 2017 SA–II

Dec 19, 2016 10:30 IST

CBSE sample paper for class 10 Science SA 2 exam 2017 is available for download. Answer key or marking scheme of the paper is also available for download.

About CBSE Sample Paper 2017 for Class 10 Science SA 2 Exam:

Every year CBSE publishes sample paper for Class 10 & Class 12, few months before the CBSE board exams. With the help of these CBSE sample papers, students get an idea about the latest CBSE examination pattern. The board has now released the sample paper for class 10 Science SA 2 Exam 2017 along with other subjects. This CBSE sample paper is very important for the coming CBSE class 10 Science SA 2 exam 2017.

CBSE Class 10 Science Syllabus 2017

Inside CBSE Sample Paper for Class 10 Science SA 2 Exam 2017:

 Two sections, A and B. Students have to attempt both the sections Question numbers 1 to 3 in Section-A are one mark question Question numbers 4 to 6 in Section- A are two marks questions Question numbers 7 to 18 in Section-A are three marks questions. Question numbers 19 to 24 in Section-A are 5 marks questions. Question numbers 25 to 33 in Section- B are multiple choice questions based on practical skills. Each question is a one mark question. Question numbers 34 to 36 in Section B are two marks questions based on practical skills.

CBSE Sample Paper for Class 10 Maths SA 2 Exam 2017

Some sample questions from CBSE Sample Paper for Class 10 Science SA 2 Exam 2017:

 Ques. No. Question Mark (s) 1 Name the process of converting vegetable oil to vegetable ghee. 1 2 List two secondary sexual characters of males that are different from that of females. 1 3 Write the main function of Ozone in the upper atmosphere 1 4 When a concave mirror is placed facing the Sun, the Sun’s rays converge to a point 10 cm from the mirror. Now, if you place a 2 cm long candles flame 20 cm away on the principal axis of the mirror, where would you place a screen to obtain the image of the candle? What would see the size of the image? Draw a ray diagram to justify your answer. 2 5 If you find coliform bacteria in a sample of water collected from a river, what would you conclude? Give reason for such kind of water pollution. 2 6 Which natural resources are called the “biodiversity hot spots”? How these hot spots maintain ecological balance? 2 7 What are isomers? “Isomers of the first three members of alkane series are not possible”. Give reason to justify this statement and draw structures of two isomers of butane, C4 H10. 3 8 An organic compound ‘X’ is a liquid at room temperature. It is also a very good solvent and has the molecular formula C2 H6 O. on oxidation ‘X’ gives ‘Y’ which give, break effervescence on reacting with NaHCO3. X reacts with Y in the presence of conc.H2SO4to give another compound ‘Z’ which has a pleasant smell. Identify X, Y and Z. also write chemical equations to show the formation of Y and Z. 3

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