Tag: phenomena around us
Questions Related to phenomena around us
Change of water into vapor (Vaporization) is which of the following change
Burning of Magnesium ribbon is a _______
Things or processes which can be reversed are called
Calcium carbide produces acetylene on reaction with water. Ethylene can be obtained by reduction of ${C} _{2}{H} _{2}$. Polythene is produced by polymerization of ${C} _{2}{H} _{4}$. Calculate the theoretical yield of polythene per kilogram of $Ca{C} _{2}$ :
Examples of slow reaction are:
Which of the following is a chemical change
Melting of wax is
Identify the physical change:
Which of the following represents a physical change?
Which of the following is/are true?