6.Which of the following type of glass is generally used in the making of cut-glass objects?

7.Acidified potassium permanganate is dropped over sodium peroxide taken in a round bottom flask at room temperature, vigorous reaction takes place to produce

8.In ordinary hydrogen, the approximate composition of ortho and parahydrogen is respectively

9.Which of the following method is used to obtain pure hydrogen?

10.Hydrogen at the moment of its generation (newly born hydrogen) is generally called