General Science Objective Questions and answer 1.)Which of the following metals forms an amalgam with other metals? A.TinB.Mercury C.LeadD.Zinc View Answer Correct Answer: B. 2.)Water gas is prepared by passing __ (A)Steam over white hot coke (B)Air over red hot coke (C)Methane over red hot coke (D)Steam over heated sulphur View Answer Correct Answer: A. 3.)Heavy water is ___ (A)Tritium oxide(B)Deuterium oxide (C)Rain water(D)Water at 4°C View Answer Correct Answer: B 4.)The gases used in different types of welding would include __ (A)Oxygen & Hydrogen(B)Oxygen, acetylene & argon (C)Oxygen & acetylene(D)Oxygen, hydrogen & nitrogen View Answer Correct Answer: C 5.)Which of the following gases is lighter than air? (A)Carbon dioxide(B)Oxygen (C)Ammonia(D)Chlorine View Answer Correct Answer: C 6.)What is laughing gas? (A.)Nitrous Oxide(B.)Carbon monoxide (C.)Sulphur dioxide(D.)Hydrogen peroxide View Answer Correct Answer: A