
Aluminium carbide reacts with water to form:
A. Methane
B. Ethane
C. Ethene
D. Ethyne
Answer
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Hint: Attempt this question by writing the chemical formula of aluminium carbide and water. You will see that an alkane is formed as the end product in this reaction along with a hydroxide of aluminium.
Complete step by step answer:
The chemical formula of aluminium carbide and water is and respectively. Aluminium carbide, as the name suggests, is a carbide of aluminium. It occurs as pale yellow to brown crystals. In aluminium carbide, each aluminium atom is coordinated to 4 carbon atoms and therefore it has a tetrahedral geometry.
It shows stability up to 1400 °C. It decomposes in water with the production of methane.
The equation for the reaction of aluminium carbide with water is given as –
From the reaction, we can see that 1 mole of aluminium carbide reacts with 12 moles of water to give 4 moles of aluminium hydroxide and 3 moles of methane gas .
From the above reaction, we can say that aluminium carbide decomposes in water to produce methane.
Therefore, the answer is option (a) – Methane -
Additional information: Aluminium carbide shows a similar reaction with any proton giving compound. For example, when aluminium carbide reacts with hydrogen chloride –
As we can see, in this reaction too, methane is formed.
Note: The above reaction is an example of hydrolysis. Reaction of a compound with water is known as a hydrolysis reaction.
Complete step by step answer:
The chemical formula of aluminium carbide and water is
It shows stability up to 1400 °C. It decomposes in water with the production of methane.
The equation for the reaction of aluminium carbide with water is given as –
From the reaction, we can see that 1 mole of aluminium carbide
From the above reaction, we can say that aluminium carbide decomposes in water to produce methane.
Therefore, the answer is option (a) – Methane -
Additional information: Aluminium carbide shows a similar reaction with any proton giving compound. For example, when aluminium carbide reacts with hydrogen chloride –
As we can see, in this reaction too, methane is formed.
Note: The above reaction is an example of hydrolysis. Reaction of a compound with water is known as a hydrolysis reaction.
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