This document contains 3 chemistry questions with explanations of the answers: 1) A question about collision theory being true or false that the answer is false because not all particle collisions result in reactions. 2) A question about the pH of ammonium nitrate that is acidic because it is a salt of a weak base and strong acid. 3) A question identifying a chemical equation as a decomposition reaction because nitrogen pentoxide breaks down into nitrogen dioxide and oxygen gas.

1. Indicate whether the following statement is true or false. According to collision theory, a
reaction will occur anytime there is a collision between reactant particles .
a) true
b) false
23
The pH of an aqueous solution of the salt NH 4 NO 3 (ammonium nitrate) will _________.
a) be basic (because it is a weak acid-strong base salt)
b) be acidic (because it is a strong acid-weak base salt)
c) be neutral (because it is a strong acid-strong base salt)
d) not be known (because it is a weak acid-weak base salt)
e) no correct response
Consider the following balanced chemical reaction:
2 N 2 O 5 ------------> 4 NO 2 + O 2
This chemical reaction is a __________.
a) synthesis reaction
b) combustion reaction
c) single-replacement reaction
d) double-replacement reaction
e) decomposition reaction

2. Solution
Q22)
The answer is FALSE
The reaction will only occur if the colliding particles collide in a proper orientation and
energy which is required for breaking of older bonds and formation of new bonds, hence
all collision won't lead to formation of molecules
Q23)
The correct answer is Option B
Reason: Since it is salt of weak base (NH4OH) and strong acid (HNO3), hence the salt will
be acidic in nature
Q24)
Correct answer is Option E
It is a decomposition reaction, since N2O5 decomposes to form NO2 and O2 gas