CBSE Class 10 Science Sample Paper Set J

CBSE Class 10 Science Sample Paper Set J. It’s always recommended to practice as many CBSE sample papers as possible before the examinations. The latest sample papers have been designed as per the latest blue prints, syllabus and examination trends. Sample papers should be practiced in examination condition at home or school and also show it to your 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.

SECTION-A

1 Write a balanced chemical equation when lead nitrate on heating forms lead oxide, nitrogen dioxide and oxygen.

2 Name two non- conventional resources of energy which were used conventionally earlier. 

3 On what factors does occurrence of single displacement reactions depends? 

4 A metal ore X is used in roasting. What kind of ore could X be? Name other type of ore which is reduced by calcination.

5 What is electromotive force? State the rule used to find the direction of current in a conductor placed in a magnetic field.

6 Why do we need to balance a chemical equation? Name the type of the reaction and balance the reaction in this case.

   NaCl + Al2(SO4)3 --------------------------------→AlCl3 + Na2SO4

7 A metal is treated with concentrated nitric acid. Instead of a gas evolved, there is aqueous solution obtained.

   Answer the following questions :

   (a) Give reason for aqueous solution.

   (b) Name two metals which are exception to this reaction.

   (c) Will the reaction be same if dilute acid is used?

                           OR

7 Describe an activity to prove that all hydrogen containing compounds such as alcohols and glucose are not acids.

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