FREE AP Chemistry Exam Trivia Question and Answers
Which of the following circumstances results in the bond length between any two nonmetal atoms?
The bond length always marks the location where the potential bond energy, which represents the equilibrium between the forces of attraction and repulsion between the two atoms, is at its lowest level.
Which of the following accurately ranks each intermolecular attraction's strength from strongest to weakest?
The strongest intermolecular attractive force, hydrogen bonding, is listed first. The least powerful and transient attractive forces are induced dipoles.
A mechanism is a series of simple reactions that together make up the reaction's overall stoichiometry. A material is referred to as such if it is created in one elementary reaction and consumed in another.
Anything that is neither a reactant nor a product is considered an intermediate. It can be challenging to find intermediates. Catalysts are compounds that can be isolated after being added to the reaction mixture and fulfill the aforementioned definition.
At 15°C, hydrogen fluoride, or HF, is a liquid. At the same temperature, all other hydrogen halides (represented by HX, where X is any other halogen) are gases. Why?
Due to fluorine's high electronegativity, hydrogen bonds—which are extremely potent dipoles—are formed between HF molecules. Since no other hydrogen halide exhibits hydrogen bonding, HF has lesser intermolecular interactions than the others (and higher boiling temperatures).
The subatomic particle with the greatest power to penetrate is
The neutron has exceptional penetrating power while having no charge. The world can accommodate many without halting.
Which of the following bonds has its negative end written last?
The element with the biggest electronegativity closest to fluorine in the periodic table is typically negative, whereas the atom that is farthest from fluorine is typically positive (lowest electronegativity). The P—Cl pair is the only one of the five couples where the second element is closest to fluorine.
When 1 mole of potassium dichromate and 3 moles of nickel are combined, how many moles of electrons are transferred?
Two moles of chromium are reduced in one mole of dichromate, each requiring three moles of electrons. Two moles of electrons are needed for each of the three moles of nickel that are being oxidized. As a result, six moles' worth of electrons is moved.