☆ which gas is produced when a fuel burns in a. sufficient supply of air
b. insufficient supply of air

☆ in a soda-set type fire extinguisher, reacts with sulphuric acid to give out carbon dioxide.



Here, We have 2 questions. (☆ marked)
Subject - Science (Biology)

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Q-Which gas is produced when a feul burns?

Q- in a soda-set type fire extinguisher, ___________ reacts with sulphuric acid to give out carbon dioxide.

if you add everything up correctly you should get 69 i got this because 50 plus 19 is it

the oldest known insects are believed to live around 400 millions ago as suggested by the fossil records.   some plants having woody stems also evolved during this time.

after the evolution of insects the first four legged species or the tetrapods evolved in shallow freshwater habitats from the intermediate species approximately 397 million years ago. the tetrapods went on conquering the land giving rise to amphibians, reptiles, mammals and birds.

the major split in tetrapods first occurred 340 million years ago branching off from amphibians.

363 million years ago when the carboniferous period began the insects started roaming on land and taking flights, following which the four limbed tetrapods adapted in the terrestrial habitat.