What happens when vinegar is mixed with baking soda?
a) the beaker became hot
b) the beaker became cold
c) the beaker became hydrated
d) none of these
A chemical reaction that evolves heat or light into their surroundings is called……..reaction.
a) decomposition
b) displacement
c) endothermic
d) exothermic
Which of the
following is/are evolved during exothermic reaction?
a) H2O
b) heat
c) light
d) both b and c
Exothermic is basically…….word.
a) Greek
b) Russian
c) English
d) Dutch
“Exo” is a Greek word which means?
a) to absorb
b) to evolve
c) to gain
d) to attract
“Therm” is a Greek word. What does it means?
a) light
b) heat
c) water
d) vapors
