Question

1.which gas is liberated when ammonium chloride is heated
2. Latin name of gold
3. variable valency of copper
4. a light green salt which leaves black residue on heating
5. the reaction in which the heat energy is liberated ​

Answer 1

Explanation:

1.which gas is liberated when ammonium chloride is heated ?

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Ammonia gas is produced when solid Ammonium Chloride is heated with.

Any ammonium compound if heated with an alkali liberates ammonia gas.

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2. Latin name of gold ?

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The Latin name for gold is aurum, meaning "shining dawn."

The Latin name for mercury, hydrargyrum, means "liquid silver."

The practice of naming an element after one of its properties continues.

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3. variable valency of copper ?

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Copper is one of the transition elements and thus exhibits variable oxidation states.

It has two valencies: +1 and +2 and the corresponding atoms are termed as Cuperous (+1 valency) and Cupric (+2 valency). These are also denoted as Cu(I) and Cu(II).

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4.a light green salt which leaves black residue on heating

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Cu2+ ion on strongly heating leaves a black residue.

Copper sulfate is normally found in the form of blue crystals, copper sulfate pentahydrate.

When you heat copper sulfate pentahydrate it turns white as the water which is driven off by the heat.

The white solid remaining is anhydrous copper sulfate.

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5. the reaction in which the heat energy is liberated

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The reaction in which heat energy is released is called Exothermic Reaction.

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