We are providing here the complete solution of CBSE Class 10 Science Board Question Paper 2018. All the solutions are explained by the subject matter experts in an appropriate manner so as to help students with an easy and effective understanding of the concepts involved in solutions.
Key features of CBSE Class 10 Science Solved Question Paper 2018 are:
- Precise and comprehensive solution has been provided for each question
- Concepts involved in solutions are explained in a simple way
- Chemical equations are written correctly
- Neat and labelled diagram are given wherever required
CBSE Class 10 Science Exam Pattern and Question Paper Design for Board Exam 2019
Going through the CBSE Class 10 Science Paper 2018 will help students to understand the pattern followed in the board question paper and type of questions asked in the exam.
CBSE Class 10 Science Solved Question Paper 2018 is available in the form of PDF which students may download to practice for the CBSE class 10 board examination 2019.
Some of the questions and their solutions from the CBSE Class 10 Science Solved Question Paper 2018, are given below:
Q. 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 ?
Ans. Violet flowers
Q.Write one main difference between asexual and sexual mode of reproduction. Which species is likely to have comparatively better chances of survival – the one reproducing asexually or the one reproducing sexually? Give reason to justify your answer.
Ans. Any one of the following difference:
(i) In sexual reproduction two opposite sexes are involved where as in asexual reproduction only one individual is involved.
(ii) In sexual reproduction male and female gamete formation takes place where as in asexual no gamete formation occurs.
- Sexually reproducing organisms have better chances of survival
- Because more variations are generated.
CBSE Class 10 Science Previous Years' Solved Question PaperS (2010-2018)
CBSE Class 10 Science Important questions with solutions for Board Exam 2019
Q. 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 two points.
(c) List two values the teacher instilled in his students in this episode.
Ans.
(a) A few good measures to manage the garbage we produce include: Incineration, waste compaction, biogas generation, composting, segregation, vermicomposting and safe disposal. (write any two)
(b) Some activities that need to be incorporated to generate the least garbage include:
- Reuse of empty bottles, books etc.
- Reduce the use of non-biodegradable substances like polythene, thermocol etc.
(c) Awareness about environment, scientific attitude, concern for community health and personal health.
Q. List the steps of preparation of temporary mount of a leaf peel to observe stomata.
Ans. The steps are:
i. Removal of peel from leaf.
ii. Stain with safranin.
iii. Put the stained peel on a clean slide.
iv. Mount it with glycerine and cover slip.
To download the complete paper, click on the following link:
Also go through the CBSE Class 10 Topper’s Answer Sheet for Science Paper 2018 to learn the criteria followed by CBSE toppers in writing their Board Exam.
Check CBSE Class 10 Science Marking Scheme to be followed in 2019 Examination:
CBSE Class 10th Science marking scheme can help students in deciding on which topic to focus more and what technique to adopt in writing the paper in the best way.
| CBSE Class 10 Science Paper Marking Scheme 2019 | |||
| Type of Questions | Question Weightage | Total Number of Questions | Total Marks |
| VSA | 1 | 2 | 2 ×1= 2 |
| SA I | 2 | 3 | 3 ×2= 6 |
| SA II | 3 | 10 | 10 ×3= 30 |
| LA | 5 | 6 | 6 ×5= 30 |
| Practical Based Questions(PBQ) | 2 | 6 | 6 ×2= 12 |
| Total | 27 | 80 | |
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