Hydrogen and oxygen combines to form___________

Among the following which is an inert gas?

Choose the equipment that work by air pressure?

The gas that is largely present is air is _______

Where the windmills are found is large numbers?

Which gas is released by plants during night?

Windmills are used to produce______

Which gas is released by plants during photosynthesis?

Name the gas which released by man during expiration?

The gas used for respiration of living things is ______