The preparation of water from hydrogen and oxygen gas is accompanied by:

Formation of ashes

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Change in state

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Evolution of coloured gas

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Formation of precipitate

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Solution

The correct option is B
Change in state

Preparation of water from hydrogen and oxygen involves a change in state.

2H_2(g) + O_2(g) → 2H₂O_(l)

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Similar questions

The chemical reaction between quicklime and water is characterised by :
(a) evolution of hydrogen gas

(b) formation of slaked lime precipitate

(d) change in colour of the product

During laboratory preparation of oxygen by hydrogen peroxide and potassium chlorate, the gas is collected by _____ displacement of water.

An example of a reaction accompanied by colour change is:

Δ G_{1}

Δ G_{2}

Δ G_{1}

Δ G_{2}

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