Endothermic and Exothermic Reactions

Which of the following is not an exothermic change?

During the process of respiration heat is absorbed.

In ­­­­­_____reactions, heat is liberated.

A girl takes some calcium carbonate and pour some water into it. She observes that some heat is evolving from it. What type of reaction it has been

Classify the following day to day activities based on chemical reactions by physical contact, solutions of reactants, heat, light, electricity and catalyst.

Addition of water to quicklime to make it slaked lime

Formation of slaked lime from quicklime is an endothermic reaction.

Explain with example: endothermic reaction.

Name the gas which supports combustion?

________________ reaction occurs in the formation of elephant toothpaste.

_____ evenly distributes the heat in reaction, ensuring slow and steady growth of carbon snake.

_____ reaction takes place in fiery snake formation.

Which of the following are exothermic processes?
(i) Reaction of water with quicklime
(ii) Dilution of an acid
(iii) Evaporation of water
(iv) Sublimation of camphor (crystals)

For an endothermic reaction

The _____ is the amount of heat per unit mass required to raise the temperature by one degree Celsius. 

In exothermic welding, the chemical reaction that produces heat is a reaction between aluminium powder and metal oxide.

Exothermic welding is a welding process that employs molten metal to permanently join the _____.

Neutralisation reaction is an exothermic reaction.

What type of chemical reaction takes place when limestone is heated? (Decomposition / Combination / Displacement)

Energy is _____ (absorbed/ released) in the formation of curd from milk.

Select the correct answer from A, B, C, D and E for each statement given below:

The basic gas obtained when two gases react in presence of a catalyst & the reaction is exothermic.

[A: Hydrogen B: Copper [II] oxide C: Oxygen D: Copper [II] hydroxide E: Ammonia]