Chemical reaction in which heat is absorbed (hot) is called………reaction
a) endothermic
b) Exothermic
c) both a and b
d) none of these
Chemical reaction in which heat is
released (cools) is called………….reaction.
a) Endothermic
b) Exothermic
c) both a and b
d) none of these
When substance combines with oxygen
while burning, reaction is termed as.
a) Combustion
b) burning
c) Evaporation
d) Both a and b
Processing of breaking down of any substance into smaller substance by heating is called……
a) Decomposition
b) Evaporation
c) Thermal decomposition
d) melting
In the following figure, a chemical reaction is showing which type of the reaction?
NTS PET 24/08/2019 (1:30)
a) additional
b) Substitution
c) exothermal
d) endothermic
Natural gas is made up of compound
…………
a) Carbon
b) Methane
c) Ethane
d) None
The correct answer is **D. both a and b.** Here's why: * **Combustion** is the formal, scientific term for a high-temperature exothermic redox chemical reaction between a reactant (fuel) and an oxidant (usually atmospheric oxygen) that produces oxidized, often gaseous products, in a mixture termed as smoke. It generally produces a flame. * **Burning** is the common, everyday term for the process of combustion, especially when it involves a flame and the rapid oxidation of a substance. So, when a substance combines with oxygen while burning, it is accurately described as both combustion and burning.
by at 2025-05-24 08:13:09