Depending on the gain or loss of energy chemical reaction can be classified as __________.

Endothermic reaction is a reaction which __________ heat from the surroundings.

Which device can be transformed from chemical energy into mechanical energy?

__________ molecule would have the weakest intermolecular forces?

Mothball and dry ice __________ without melting.

In which of the intermolecular forces would be occurred in CO₂ molecule?

In non-polar molecules  __________ is present.

A water molecule can combine with the hydrogen (H⁺) ion, using a coordinate bond to form the __________.

In diamond, each carbon atom is bonded to __________ other carbon atom(s).

CO molecule has a triple bond that consists of __________.