Which of the following is/are examples of exothermic reaction? a. Burning of natural gasb. Electrolysis of waterc. Decomposition of vegetable into compostd. Decomposition of silver bromideOnly one correct answerA.Only aB.Only bC.a and bD.a and c
Question
Which of the following is/are examples of exothermic reaction? a. Burning of natural gasb. Electrolysis of waterc. Decomposition of vegetable into compostd. Decomposition of silver bromideOnly one correct answerA.Only aB.Only bC.a and bD.a and c
Solution
The correct answer is D. a and c.
Here's why:
a. Burning of natural gas is an exothermic reaction. In an exothermic reaction, energy is released to the surroundings, usually in the form of heat. The burning of natural gas (methane) releases heat, making it an exothermic reaction.
b. Electrolysis of water is not an exothermic reaction, but an endothermic one. It requires energy (usually in the form of electricity) to break the bonds in water molecules and form hydrogen and oxygen gas.
c. Decomposition of vegetable into compost is an exothermic process. As the vegetable matter breaks down, it releases heat.
d. Decomposition of silver bromide is an endothermic process. It requires energy (usually in the form of light) to break the bonds in silver bromide and form silver and bromine.
So, the examples of exothermic reactions in the options given are a and c.
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