Write one use of Periscope.

Write one use of urea.

Write one use of urea?

Write an use of led.

Write one use of dichloromethane and one harmful effect of it on human body.

Write one use of dichloromethane and one harmful effect of it on human body.

Write one use of each of Silicones and Zeolite.

Name any one material having a small value of temperature coefficient of resistance.Write one use of this material.

Describe the preparation of graphaiate imacheson process. Why CO is highly- toxic? Write one use of silica gel.

What is per halosilanes? How would you prepare per halosilanes. Write one use of silica gel?

Write some use of hydrogen.