Question

Salim was performing an experiment in the chemistry lab. He was heating salt in a test tube. Suddenly his classmates in the neighborhood started coughing. A smell similar to that of burning sulphur was felt and light brown residue was left in the test tube I.Which substance was taken in the test tube? II.Write the equation of the above reaction. III.Which is the safest way t o determine the smell of gas? IV.Write a precaution to be observed while performing the experiment.

Answer 1

http://www.meritnation.com/ask-answer/question/salim-was-performing-an-experiment-in-the-chemistry-l... the answer is given .