111. The using of fuels is the basis that burning of carbon in oxygen produces.?
A. Energy
B. Heat
C. Light
D. Electricity
112. The burning of methane in oxygen is used in.?
A. Kitchens
B. Flames
B. Automobiles
D. Engines
113. In chemistry we usually deal with energy changes of reaction in terms of.?
A. Heat
B. Electricity
C. Light
D. Current
114. Under certain conditions, energy may appear int he form of light, electricity or mechanical work from a.?
A. Chemical system
B. System
C. Reaction
D. Reactant
115. The energy changes of a chemical reaction are measured in.?
A. Kil0 joules (KJ)
B. Kilo calorie (Kcal)
C. Both of them
D. None of them
116. One calorie is equal to.?
A. 1.065 J
B. 0.418 J
C. 2.013 J
D. 4.184 J
117. Other units fro the measurement of heat energy are.?
A. Caloric
B. Kilowatt hours (kwh)
C. British thermal unit (BTU)
D. All of them
118. The SI unit of energy is.?
A. Joule
B. Caloric
C. Newton
D. Watt
119. When a force of one Newton acts over a distance of one metre, it is.?
A. One calorie
B. One watt
C. One joule
D. One pound
120. The natural cause of a chemical reaction is the tendency to attain.?
A. Lowest energy state
B. Highest energy state
C. Perfection
D. Stability
