Sawaal
13
Q:

Which of the following reactions are exothermic?

 

1)   C + O2  → CO22)  2Mg + O2  → 2MgO3)  CuSO4 + 5H2O  → CuSO4.5H2O4)  All the above

A) 1 B) 2
C) 3 D) 4

Answer:   D) 4



Explanation:

Here all the given options are Exothermic reactions. Exothermic reactions are those reactions which involves the release of heat.

 

Generally all the combining reactions are exothermic in nature.

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Alloy of copper and zinc is called as Brass.

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Explanation:

In the thermite process, the reducing agent is Aluminium.

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Explanation:

The main use of salt in the diet is to produce in small amounts the hydrochloric acid required for the digestion of food.

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Here in the given options, Oxygen is the most electronegative element. Fluorine is followed by Oxygen, Chlorine and Nitrogen is the most electronegative elements list.

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bullet proof material is made up of polymer Poly carbonates.

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