We need ……..to perform different functions.
a) heat
b) light
c) energy
d) water
Where an exothermic reaction takes place in our body?
a) heart
b) lungs
c) skins
d) all cells
Glucose combines with …….. to produce energy and carbon dioxide.
a) CO2
b) O2
c) NO2
d) all of these
Fuels such as coal, LPG etc burn with flame and release a lot of energy. What type of this reaction is?
a) addition
b) displacement
c) endothermic
d) exothermic
Batteries are the sources of…….
a) heat
b) force
c)electricity
Which type of reaction takes place in the batteries?
a) addition
b) displacement
c) endothermic
d) exothermic
