<em>i think the answer is b </em>
Answer : The correct option is, (C)
Explanation :
A.
This is synthesis reaction in which the two or more reactant react to give a single product.
B.
This is combination reaction in which the two reactants combine to form a single product.
C.
This is a neutralization reaction in which an acid react with a base to give a salt and water as a product.
D.
This is a double displacement reaction in which the positive cation and negative anion of two reactants exchange their places to give two new products.
Hence, the reaction (C) is a neutralization reaction.
Answer:
- <u><em>C. The rate of sublimation of the NH₄CI crystals is equal to the rate of solidification of the NH₄CI vapors.</em></u>
<u><em></em></u>
Explanation:
The question is garbled and the reactants and products do not match.
This is the correct question, assuming the products are correctly described:
"Consider the equilibrium system below.
If the system is at dynamic equilibrium, which statement is true?
- A. Sublimation of the NH₄CI crystals stops.
- B. Solidification of the NH₄CI vapors stops.
- C. The rate of sublimation of the NH₄CI crystals is equal to the rate of solidification of the NH₄CI vapors.
- D. The rate of sublimation of the NH₄CI crystals is higher than the rate of solidification of the NH₄CI vapors"
<h2>Solution</h2>
The left side of the equation shows solid<em> NH₄CI</em>. The right side shows gas <em>NH₄CI</em>.
Thus, the equation represents the <em>equilibrium</em> between the formation of <em>crystals</em> (solid) and <em>vapors </em>(gas) of the compound <em>NH₄CI</em>.
The change from solid state to gas state is represented by the <em>forward reaction </em>(fom left to the right). It is named sublimation.
The change from vapors to crystals (named deposition) is represented by the <em>reverse reaction</em> (from right to left).
<em>Dynamic equilibrium</em> means that the molecules continually form vapors and cristals at the same speed. Thus, the final result is that each the total number of molecules of vapors and the total number of molecules of crystals do not change.
In conclusion, <em>"The rate of sublimation of the NH₄CI crystals is equal to the rate of solidification of the NH₄CI vapors" (option C).</em>