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Tests for Hydrogen

Question

The product formed when hydrogen is burnt in air is:
hydrogen peroxide
ozone
water
hydronium

A

hydrogen peroxide

B

ozone

C

water

D

hydronium

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Solution

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Hydrogen gas is a highly flammable gas and burns in air at a wide range of concentration between 4% and 75%. It forms explosive mixture with air if its concentration 4-74%. This mixture can be ignited by spark, heat or sunlight.
$2 H_{2} + O_{2} \to 2 H_{2} O + 572 K J$

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