[HDquiz quiz = “5178”]
Browsing: Chemistry
1. Which one of the following is a main component of fertilizers? A. Chlorine B. Hydrogen C. Methane D. Ammonia…
[HDquiz quiz = “5167”]
1. A radioactive element emits an alpha particle. The mass number of the element , after emission ___________. A. Remains…
[HDquiz quiz = “5156”]
1. An element of an inorganic compound found in nature and contains metal is known as _________. A. Mineral B.…
[HDquiz quiz = “5145”]
1. Fuel combustion is a process in which _____. A. Heat is not absorbed nor liberated B. Heat is absorbed…
1. Carbon exists in the atmosphere in the form of _____. A. Carbon monoxide only B. Carbon monoxide in traces…
[HDquiz quiz = “5132”]