Yes it is a chemical change because it is changing color which shows a chemical change, plus it changes into another element
Answer:
=144a⁴−168a³b−239a²b²+168ab³+144b⁴
Explanation:
=144a⁴−168a³b−239a²b²+168ab³+144b⁴
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.
The partial pressure of argon is:
1.63-0.71= 0.92 atm