1. Which of the following is non-metal?, iron, aluminium, sulphur, copper, 2. Which element is essential for respiration?, oxygen, iron, copper, aluminium, A non-metal generally tends to:, lose electrons only, gain or share electrons, form only positive ions, conducts electricity very well, 4. Which of the following contains carbon in the form of graphite?, Pencil lead, Iron nail, Copper wire, Aluminium foil

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