With the final date announced for the CBSE class 10 Science paper that is 22nd March, 2017, students appearing for the exam must have geared up for the final revisions. Now it’s important for the students to utilize this mean time more cautiously by following the best strategic study plan. Getting good grades in class 10th exams is of utmost importance to get further admission in any prestigious school.
This is the most crucial time when students should focus on smart preparation in less time, which is possible only with effective revision plans. One of the most prominent ways of revising the syllabus before the main exam, is solving the previous year solved papers which will help to understand the exam pattern and marking trends. Moreover, it will give a clear overview of the types of questions asked in the board exam. By solving previous years’ question papers, students will get to have a fair idea of the important topics which they should pick to prepare for the questions carrying different weightage.
Jagranjosh here brings a collection of Class 10 Science Last 5+1 years’ Short Questions that carry five marks each, to help the students track their performance and get a firm grip over the type of questions that are probably going to be asked in the upcoming board exam.
As per the latest CBSE Exam Pattern, in CBSE Class 10 Science Paper, 6 questions (from Q. no. 19 to 24) in Section- A are five marks questions. These are to be answered in about 70 words each.
Some sample questions from the collection of previous years’ five marks questions are:
Q. (a) If the image formed by a lens is diminished in size and erect, for all positions of the object, what type of lens is it?
(b) Name the point on the lens through which a ray of light passes undeviated.
(c) An object is placed perpendicular to the principal axis of a convex lens of focal length 20 cm. The distance of the object from the lens is 30 cm. Find
(i) the position
(ii) the magnification and
(iii) the nature of the image formed.
Q. (a) What is fragmentation in organisms? Name a multicellular organism which reproduces by this method.
(b) What is regeneration in organism? Describe regeneration in Planaria with the help of a suitable diagram.
Q. (a) Explain the terms „self pollination‟ and „cross pollination‟?
(b) How do the insects help in cross-pollination?
(c) How is the process of pollination different from fertilization?
Q. An organic acid X is a liquid, which often freezes during winter time in cold countries, having the molecular formula C2H4O2. On warming it with methanol in the presence of a few drops of concentrated sulphuric acid, a compound Y with a sweet smell is formed.
(a) Identify X and Y. Also write their formulae showing the functional group present in them.
(b) Write a chemical equation of the reaction involved.
Q. (a) Explain why, a salt which does not conduct electricity in the solid state becomes a good conductor in molten state.
(b) How are metals refined by the electrolytic process? Describe the electrolytic refining of copper with the help of a neat diagram?
Q. List two reasons for carbon forming a large number of compounds. Name the type of bonding found in most of its compounds. Why does carbon form compounds mainly by this kind of bonding?
Give reason why the carbon compounds:
(i) Generally have low melting and boiling points.
(ii) Do not conduct electricity in molten state.
Q. (a) One half of a convex lens of focal length 10 cm is covered with a black paper. Can such a lens produce an image of a complete object placed at a distance of 30 cm from the lens? Draw a ray diagram to justify your answer.
(b) A 4 cm tall object is placed perpendicular to its principal axis of a convex lens of focal length 20 cm. The distance of the object from the lens is 15 cm. Find the nature, position and the size of the image.
Q. (a) Define focal length of a divergent lens.
(b) A divergent lens of focal length 30 cm forms the image of an object of size 6 cm on the same side as the object at a distance of 15 cm from its optical centre. Use lens formula to determine the distance of the object from the lens and the size of the image formed.
(c) Draw a ray diagram to show the formation of image in the above situation.
Get answers to all above questions by clicking the following link: