Question

give chemical equation of
change in state ?
change in colour ? ​

Answer 1

Answer:

Chemical equation for change in state:

$\mapsto\tt{H_{2}(g)+O_{2}(g)\longrightarrow 2H_{2}O(l)}$

Chemical equation for change in colour:

$\mapsto\tt{CuSO_{4}+Fe)\longrightarrow FeSO_{4}+Cu}$

(Blue to Green)

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What is a chemical equation ?

A chemical equation represents the reactants which reacts with each other to form some products chemically.

Examples are:

• Burning of magnesium ribbon
• Burning of natural gas

What helps us to determine that a chemical reaction has taken place:

The following helps in the determination of whether a chemical reaction has taken place:

• Change in state
• Change in temperature
• Evolution of gas
• Change in colour
• Precipitation occurs

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Answer 2

Answer:

Change in state :

NH3 (g) + HCl (g) = NH4Cl (s)

Ammonium gas reacts with hydrogen chloride gas to produce solid ammonium chloride.

Change in color :

Al2(SO4)3 + Cu = CuSO4 + Al

Colorless Aluminum sulphate when combines with copper metal forms Copper sulphate which is Blue in color.

Hope it Helps !!