1. Starting from carbon dioxide how would you obtain
a) A weak acid
b) A fertilizer
c) A highly poisonous gas
d] Black particles of carbon. [Give balanced equations for the same]
2. State how you would convert carbon dioxide to a metallic carbonate using a basic oxide. e.g. sodium oxide. [Give a balanced equation]
20. Convert carbon monoxide to carbon dioxide using two different methods.
Answers
Answer of Q. 1
(A). a weak acid. (carbonic acid from CO2)
when CO2 is dissolve in water, carbonic acid ( H2CO3) is formed.
CO2 + H2O ---------------------> H2CO3
(B). a fertilizer
CO2 reacts with ammonia gas(NH3) to form urea ( a nitrogenous fertilizer) [NH2]2 CO + H2O.
2NH3 + CO2 ---------> [NH2]2 CO + H2O.
(C). a highly poisonous gas [ CO ]
CO2 is reduced to a highly poisonous gas CO by carbon ( coke ). ( carbon monoxide gas CO ).
CO2 + C --------------------------> 2CO
(D). black particles of carbon
Burning of magnesium(Mg) burn in CO2 making use of oxygen of CO2 producing black carbon particles(MgO).
2Mg + CO2----------------------> 2MgO + C
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Answer of Q. 2
Basic oxide like Na2O by CO2 are converted into carbonate.
Na2O + CO2 ----------------> Na2CO3
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Answer of Q. 3
Method of converting CO to CO2.
1). CO bums in oxygen and changes to CO2.
2CO + O2 -------------------> 2CO2 + ∆
2). By reducing metal oxide
ZnO + O2 --------------------> Zn + CO2
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