Question

Which is not an exothermic reaction.
•Carbon Burns in oxygen to form carbon dioxide
•Water is added to quicklime
•Carbon is heated with sulphur to form carbon disulphide
•Hydrogen is burnt with oxygen to form water​

Answer 1

Answer:

Which is not an exothermic reaction.

•Carbon Burns in oxygen to form carbon dioxide

•Water is added to quicklime

•Carbon is heated with sulphur to form carbon disulphide

•Hydrogen is burnt with oxygen to form water

Answer 2

One of the following is an endothermic reaction. This is:

Answer:

(A) This is an incomplete combustion reaction so energy will be released.

(B)Combination of nitrogen and oxygen to form Nitrogen Monoxide-

Heat is required for this process.

So N

2

+O

2

→2NO−180.6KJ is an endothermic reaction.

(C) combination of glucose and oxygen to form carbon dioxide and water is a combustion reaction.So energy will be released.

(D)in a combination of zinc and hydrochloric acid to form zinc chloride and hydrogen heat is released.

so correct answer is (B).