CBSE 10th Science Practical Skills Question Paper 2010

CBSE Class 10th Science Practical Skills Question Paper 2010, CBSE Delhi Class 10th (X) 2010 Science Practical Skills Question Paper CBSE Class X Science Practical Skills Question Paper 2010 outside Delhi Students Free Download CBSE 10th  – X Science Practical Skills Question Paper for Foreign Students with Answers and Solution 2010 CBSE Board Exam Papers for Class 12 (X) std CBSE 2010 Science Practical Skills Question Bank with Full Details

    CBSE 10th Science Practical Skills  Question Paper 2010 
 Time allowed: 3 hours
Maximum marks: 100

A.)  The correct procedure of heating iron-sulphur mixture to prepare iron suiphide is

(1) heat the powder mixture at the base of the test tube using a blue flame throughout.
(2) heat the iron filing sulphur mixture in the middle of the test tube using yellow flame throughout.
(3) heat the powder mixture at the top of the test tube using an orange flame throughout.

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