[A]Gas suspended in liquid
[B]Gas suspended in solid
[C]Liquid suspended in gas
[D]Solid suspended in gas
2. Which among the following was the first artficially produced element?
3. Duralumin which is used in making aeroplanes is an alloy consisting of
[A]Aluminium, Iron and Manganese
[B]Magnesium and Brass
[C]Aluminium, Copper, Manganese and Magnesium
[D]Aluminium, Copper and Chrome
4. Jewellery was left exposed to the atmosphere for some time and it becomes coated with green carbonate. In such a case,the jewellery is made up of which of the following?
5. The atomic weight of chlorine is 35. It consists of __________________________.
[A]17 protons +18 neutrons
[B]18 protons +17 neutrons
[C]17 protons +17 neutrons+ 1 electron
[D]16 protons +17 neutrons+ 2 electrons