Which one of the following contains cobalt?

Which of the following gases is used in cigarette lighters?

Heavy water is used as a coolant in nuclear reactors Heavy water is

The metal that is used as a catalyst in the hydrogenation of oils is

All acids essentially have

The substance that is least prone to catch and spread fire is

Which of the following substances is added to soap to make it antiseptic?

Liquid hydrocarbons are converted to low molecular weight gaseous hydrocarbons by a process known as

Consider the following statements:
1.Hallucinogen includes a wide variety of chemicals that cause metabolic stimulation and mood elevation.
2.Some stimulants are synthetic, and others are derived from certain plants.
3.Tranquilizers, valium, librium, reserpines are common mood elevators.
4.Depressants depress the action of the central nervous system – some relieve pain, other relieve anxiety and relax muscles and yet other increase drowsiness and sleep. Which of the above statements are incorrect?

Chocolates can be bad for health because of a high content of