Traffic policemen on duty at busy street crossings during heavy traffic rush hours are advised to use:__________?
A. Hydrogen tank
B. Nitrogen tankC. Oxygen tank
D. None of these
Traffic policemen on duty at busy street crossings…
Benzene gives mainly_________?
A. Addition reactionB. Substitution reactions
D. All of these
enzene is much more stable than expected.
The extra stability means that benzene will less readily undergo addition…
Air is a/an _________?
C. ElectrolyteD. Mixture
In chemistry, a solution is a homogeneous mixture composed of two or more substances. In such a mixture, a solute is a substance dissolved in another…