Heating of a mixture consisting of potassiumm nitrate , carbon and sulphur involves which of the following chemical changes ?

Heating of a mixture consisting of potassiumm nitrate , carbon and sul

1.	Heating of a mixture consisting of potassiumm nitrate , carbon and sulphur involves which of the following chemical changes ?
Answer» DECOMPOSITION and combination. Double decomposition. Combination and displacement. Displacement and decomposition. Solution :Gunpoweder is mixture of`KNO_(3)`, sulphur and coke . When it is heated `KNO_(3)`UNDERGOES decomposition to produce `O_(2)and KNO_(2)`.S and Cburin in the PRESENCE of `O_(2)`producing `SO_(2)and CO_(2)`. `2KNO_(3)OVERSET(Delta)to2KNO_(2)+O_(2)` `C+O_(2)toSO_(2)` `C+O_(2)toCO_(2)` Hence , thetype of chemical change involved is decomposition and combination.