A chemical reaction that involves heat or light to their surrounding is called exothermic reaction. Which one of the following is not exothermic reaction?
ایک کیمیائی ردعمل جس میں ان کے ارد گرد گرمی یا روشنی شامل ہے، اس سے زیادہ غیر معمولی ردعمل کہا جاتا ہے. مندرجہ ذیل میں سے ایک کون سا ردعمل نہیں ہے؟
Answer: CaCO3(s) ---> CaO(g) + CO2(g)
Explanation
CaCO₃ → CaO + CO₂ is an endothermic reaction because it absorbs heat to decompose calcium carbonate.
Exothermic reactions (like combustion reactions) release heat to the surroundings.
This question appeared in
Past Papers (5 times)
ETEA 25 Years Past Papers Subject Wise (Solved) (2 times)
ETEA Past Papers (1 times)
KPK Teacher Past Papers SST PST CT TT PET (2 times)
This question appeared in
Subjects (1 times)
EVERYDAY SCIENCE (1 times)
Related MCQs
- The amount of heat evolved or absorbed in the chemical reaction is the same no matter the reaction takes place in one step or several steps" in the statement of?
- Exothermic reaction include/s _______?
- For an exothermic reaction the sign of enthalpy will be ______?
- An endothermic reaction is a chemical reaction that absorbs energy from its surroundings, usually in the form of heat. Which of the following reactions is endothermic?
- Formation of heat in a chemical reaction is called?
- What is the balanced chemical equation for the reaction following reaction? H2(g) + O2(g) → 2H2O(g)
- Consider the following chemical reaction: AB + C →A + BC. The above reaction is type of _____?
- The heat evolved or absorbed during a chemical reaction is known as ______?
- The reaction which releases or gives off heat is called?
- A reaction which is never goes to completion is known as reversible reaction. Reversible reaction is represented by ______?
