❓Chemistry questions❔
English
Intermediate
Chemistry, Structure of the atom, Periodic classification of the element, Chemical bonding and inter molecular forces, Chemical reactions and stoichiometry
Tags
30
Questions
1 min
Per question
7:16
Average time
4.0
Contest Score
1.5
Community Rating
21
Participants
Educational explanations. 👍 Explanations cover why the correct answers are correct and why the wrong answers are wrong (when appropriate). E.g.: #q1, #q2, #q30
– New substance is formed
– Alters composition of substances
– Energy is absorbed or released
– Easily reversed
There are some chemical changes which are easily reversed. For example: Nh3+ HCl is easily reversed reaction.