Answer:
Last Quarter also called Third Quarter.
Explanation:
Answer:
Ranking of given compounds in order of decreasing boiling point : KF > Formaldehyde > Carbon tertrafluoride
Explanation:
- KF is an ionic compound. Hence ionic force is between KF molecules.
- Formaldehyde is a polar compound due to presence of polar carbonyl group. Hence dipole-dipole force is present between formaldehyde molecules.
- Carbon tetrafluoride is a non-polar molecule due to it's symmetrical structure. hence only van der waal force exists between carbon tetrafluoride molecules.
- Order of intermolecular force (decreasing order): Ionic force > dipole-dipole force > van der waal force
- So ranking of given compounds in order of decreasing boiling point : KF > Formaldehyde > Carbon tertrafluoride
There are a few ways to slow down a chemical reaction:
Provide less heat
; adding heat increases particle movement, speeding up a reaction.
Less surface area
: a larger surface area often also speeds up the reaction.
Less quantity of the element