Chemistry
Related Questions
(a) Give four uses of oxygen.
(b) How is oxygen naturally renewed in air?
Fill in the blanks:
(a) …………… is the most abundant inert gas present in air.
(b) Oxides of sulphur and nitrogen combine with rain water to form …………… and …………… which cause …………… .
(c) …………… and …………… are the most common air pollutants.
(d) …………… discovered the oxygen gas.
(e) Oxygen occupies about …………… of air by volume.
Match the following:
Column A Column B (a) Global warming (i) Hydrated ferric oxide (b) Acid rain (ii) Manganese dioxide (c) Rust (iii) Carbon dioxide (d) Catalyst (iv) Methane (e) Photosynthesis (v) Nitrogen dioxide