When the solid A is added to water, it dissolves with the evolution of a lot of heat and making little explosions to form two products B and C. The properties of products B and C are entirely different from those of solid A as well as water. Moreover, products B and C cannot be reconverted into solid A and water. When another solid D is added to water, it dissolves with absorption of a little heat of form a product E which cools down. The product E shows the properties of both, solid D as well as water. Moreover, product E can be converted into solid D and water. 
i) A chemical change occurs when solid A is dissolved in water 
ii) A physical change occurs when solid D is dissolved in water 
iii) Metal sodium could behave like solid A 
iv) Metal sodium and E is a mixture
Which of the following are correct for the above process