Multi-choice Question Which of the following is not a physical property of oxygen Answers Option 1 It is colourless, has no odour and is neutral. Option 2 It is slightly soluble in water. Option 3 It burns with a pop sound Option 4 It has almost the same density as air. Feedback Wrong Wrong Correct Option Wrong Solution Wrong (Feedback) Wrong (Feedback) Correct Option (Feedback) Wrong (Feedback)
Multi-select Question Which of the following are the uses of oxygen Answers Option 1 Used as an aid for breathing where problem of breathing arises Option 2 In the oxyacetylene (i.e. oxygen-ethyne) flame - used in welding and cutting steel plate - due to the very high temperature of the flame (about 2200oC). Option 3 It can be used to treat HIV Feedback Solution Correct Correct Incorrect