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Which of the following does not give oxygen on heating? [NEET 2013]
- a)Zn(ClO3)2
- b)K2Cr2O7
- c)(NH4)2Cr2O7
- d)KClO3
Correct answer is option 'C'. Can you explain this answer?
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Which of the following does not give oxygen on heating? [NEET 2013]a)Z...
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Which of the following does not give oxygen on heating? [NEET 2013]a)Z...
Explanation:
When a substance is heated, it undergoes a chemical reaction and may produce different products. In this question, we need to determine which of the given substances does not give oxygen when heated.
Let's analyze each option:
a) Zn(ClO3)2:
Zinc chlorate (Zn(ClO3)2) can decompose upon heating to produce zinc chloride (ZnCl2) and oxygen gas (O2). The balanced chemical equation for this reaction is:
2Zn(ClO3)2 → 2ZnCl2 + 3O2
b) K2Cr2O7:
Potassium dichromate (K2Cr2O7) can also decompose upon heating to produce potassium chromate (K2CrO4) and oxygen gas (O2). The balanced chemical equation for this reaction is:
2K2Cr2O7 → 2K2CrO4 + 3O2
c) (NH4)2Cr2O7:
Ammonium dichromate ((NH4)2Cr2O7) is a compound that can undergo a decomposition reaction when heated, but it does not release oxygen gas. Instead, it decomposes to produce nitrogen gas (N2), water vapor (H2O), and chromium(III) oxide (Cr2O3). The balanced chemical equation for this reaction is:
(NH4)2Cr2O7 → N2 + 4H2O + Cr2O3
d) KClO3:
Potassium chlorate (KClO3) is a compound that readily decomposes upon heating to produce potassium chloride (KCl) and oxygen gas (O2). The balanced chemical equation for this reaction is:
2KClO3 → 2KCl + 3O2
From the above analysis, it is clear that option C, (NH4)2Cr2O7, does not give oxygen when heated. Instead, it decomposes to produce nitrogen gas, water vapor, and chromium(III) oxide.
When a substance is heated, it undergoes a chemical reaction and may produce different products. In this question, we need to determine which of the given substances does not give oxygen when heated.
Let's analyze each option:
a) Zn(ClO3)2:
Zinc chlorate (Zn(ClO3)2) can decompose upon heating to produce zinc chloride (ZnCl2) and oxygen gas (O2). The balanced chemical equation for this reaction is:
2Zn(ClO3)2 → 2ZnCl2 + 3O2
b) K2Cr2O7:
Potassium dichromate (K2Cr2O7) can also decompose upon heating to produce potassium chromate (K2CrO4) and oxygen gas (O2). The balanced chemical equation for this reaction is:
2K2Cr2O7 → 2K2CrO4 + 3O2
c) (NH4)2Cr2O7:
Ammonium dichromate ((NH4)2Cr2O7) is a compound that can undergo a decomposition reaction when heated, but it does not release oxygen gas. Instead, it decomposes to produce nitrogen gas (N2), water vapor (H2O), and chromium(III) oxide (Cr2O3). The balanced chemical equation for this reaction is:
(NH4)2Cr2O7 → N2 + 4H2O + Cr2O3
d) KClO3:
Potassium chlorate (KClO3) is a compound that readily decomposes upon heating to produce potassium chloride (KCl) and oxygen gas (O2). The balanced chemical equation for this reaction is:
2KClO3 → 2KCl + 3O2
From the above analysis, it is clear that option C, (NH4)2Cr2O7, does not give oxygen when heated. Instead, it decomposes to produce nitrogen gas, water vapor, and chromium(III) oxide.
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