Chemistry
A silvery white metal A is in the form of a ribbon. It burns with a dazzling white flame to form a white powder B. When water is added to powder B, it partially dissolves to form a substance C.
(a) What is metal A ?
(b) Write the equation for the conversion of A to B and state the type of reaction.
(c) Write a balanced equation for the conversion of B to C and state the type of reaction.
Related Questions
Give one example each of :
(a) Thermal decomposition.
(b) Electrolytic decomposition.
(c) Photochemical decomposition.
Write balanced equations for the following and identify the type of chemical reaction.
(a) Iron reacts with chlorine to form iron (III) chloride.
(b) Calcium oxide combines with silicon dioxide to form calcium silicate.
(c) Hydrogen peroxide produces water and oxygen.
Which of the following is not a characteristic of a chemical change?
(i) It is irreversible
(ii) No net energy change is involved
(iii) New substance is formed
(iv) Involves absorption or liberation of energy
A reaction of a type: AB + CD ⟶ AD + CB, involves
(i) no chemical change
(ii) decomposition of AB and CD
(iii) exchange of ions of AB and CD
(iv) combination of AB and CD