Question

Какая соль при нагревании превращается в оксид? А) NH4Cl Б)KCLO3 B)NaNO3 Г)Cu(NO3)2

Answer 1

Cu(NO3)2=CuO+NO2 - превращается в оксид- то есть CuO.

Answer 2

Identifying the Salt that Turns into Oxide upon Heating

When a salt is heated, it can undergo various chemical reactions, including decomposition to form an oxide. Let's examine the options provided to determine which salt transforms into an oxide upon heating.

A) NH4Cl B) KClO3 C) NaNO3 D) Cu(NO3)2

Analysis of Options

A) NH4Cl - Ammonium chloride (NH4Cl) is known to undergo sublimation when heated, forming ammonia and hydrogen chloride gases. It does not directly transform into an oxide upon heating.

B) KClO3 - Potassium chlorate (KClO3) decomposes upon heating to form potassium chloride (KCl) and oxygen gas (O2). It does not directly transform into an oxide upon heating.

C) NaNO3 - Sodium nitrate (NaNO3) decomposes upon heating to form sodium nitrite (NaNO2) and oxygen gas (O2). It does not directly transform into an oxide upon heating.

D) Cu(NO3)2 - Copper(II) nitrate (Cu(NO3)2) decomposes upon heating to form copper(II) oxide (CuO), nitrogen dioxide gas (NO2), and oxygen gas (O2).

Conclusion

Based on the analysis, the salt that transforms into an oxide upon heating is D) Cu(NO3)2.

Therefore, when heated, the salt Cu(NO3)2 undergoes a chemical reaction to form copper(II) oxide.

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