CBSE Class 10 Science Sample Paper SA1 2013

CBSE Class 10 Science Sample Paper SA1 2013. CBSE issues sample papers every year for students for class 10 board exams. Students should solve the CBSE issued sample papers to understand the pattern of the question paper which will come in class 10 board exams this year. The sample papers have been provided with marking scheme. It’s always recommended to practice as many CBSE sample papers as possible before the board examinations. Sample papers should be always practiced in examination condition at home or school and the student should show the answers to teachers for checking or compare with the answers provided. Students can download the sample papers in pdf format free and score better marks in examinations. Refer to other links too for latest sample papers.

1. State the direction of magnetic field in the following case-

2. What is the role of fine hairs and mucus in nostrils ?

3. Name any two elements that are used in fabricating solar cells.

4. When lead nitrate solution and potassium iodide solution are mixed together, we get lead iodide and potassium nitrate solution. Write balanced chemical equation for the reaction involved.

5. Name two metals which can be melted when kept on palm ? Give reason the of melting of these metals.

6. Name a device that you can use to maintain a potential difference between the ends of a conductor. Explain the process by which this device does so.

7. Mention and explain the function of an earth wire ? Why it is necessary for earth metallic appliances ?

8 To a solution of sodium hydroxide in a test tube two drops of phenolphthalein are added.

(i) State the colour change observed.

(ii) If dil HCl is added drop wise to the solution, what will be the colour change?

(iii) On adding few drops of NaOH solution to the above mixture the colour of the solution reappears. Why?

9. Write the rules for writing a word equation for a chemical reaction .Give one example.

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