CBSE Class 10 Science Question Paper SA 1 2011 (10)

CBSE Class 10 Science Question Paper 2012 (10). Students can download the last year question papers using the link below. Free download of examination question papers with solutions. Last 10 year question papers should be practised to get better marks in examinations.

SUMMATIVE ASSESSMENT - I (2011)

SCIENCE Class – X 

SECTION-A 

1. State the chemical change that takes place when lime stone is heated strongly.

2. Why do silver articles become black after some time when exposed to air ?

3. Name the device which directly converts solar energy into electrical energy.

4. What are amphoteric oxides ? Choose the amphoteric oxides amongst the following oxides. H₂O Na₂O, ZnO, Al₂O₃, CO₂, H₂O

5. What are antacids ? Name two compounds which are used as antacids.

6. A small amount of ferrous sulphate crystals were heated in a hard glass test tube ?

     (i) Write the equations involved in the above reaction

     (ii) Name the type of reaction that takes/ place ? 

7. A white salt on heating decomposes to give brown fumes and a residue is left behind.

     (i) Name the salt.

     (ii) Write the equation for the decomposition reaction. 

8. What are the final products produced after digestion of carbohydrates and proteins ?

9. Out of two solar cookers one was covered by a plane glass slab and the other was left open. Which of two solar cookers will be more efficient and why ?

Please click the link below to download pdf file of CBSE Class 10 Science Question Paper SA 1 2011 (10)