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
Answers
Answer:
ANSWER
(i) Alkalis reacts with ammonium salts on heating to liberate ammonia gas.
Ca(OH)
2
+2NH
4
Cl→CaCl
2
+2NH
3
+H
2
O
(ii) When sodium nitrite reats with ammonium chloride nitrogen gas is liberated.
NaNO
2
+NH
4
Cl→NaCl+N
2
+2H
2
O
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1. Alkalis reacts with ammonium salts on heating to liberate ammonia gas. (ii) When sodium nitrite reats with ammonium chloride nitrogen gas is liberated.
2. The Latin name of gold is Aurum
3. 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).
4. Cu2+ ion on strongly heating leaves a black residue. Copper sulfate is normally found in the form of blue crystals, copper (II) 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.
5. The answer is Exothermic Reaction
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