In which of the following is the entropy change positive?...
In which of the following is the entropy change positive?
Thermal dissociation of ammonium chloride
Reaction between an acid and a base
Addition of concentrated acid to water
Dissolution of sodium metal in water
Correct answer is A
Thermal dissociation of ammonium chloride is an endothermic reaction as heat is absorbed for a positive entropy, with more products than reactants.
Which of the following substance is an ore of iron? ...
The Bohr model of the atom proposed the existence of? ...
What amount of hydrogen will be required for complete hydrogenation of one mole of pent-3-yne? ...
The oxidation number of boron in NaBH 4 is...
The addition of water to calcium oxide leads to? ...
A liquid that will dissolve fat is ...
What is the principal ore of iron, from which iron is extracted? ...
Which of the following gases is used to retard the vaporization of the filament in a light bulb? ...
Sulphur exists in six forms in the solid state. This property is known as? ...