Across
- 4. 12, Water breaks into hydrogen and oxygen on passing electric current.
- 7. 7, a type of decomposition in which heat is required.
- 8. 9, Addition of hydrogen and removal of oxygen.
- 9. 9, Copper reacts with oxygen from black copper oxide.
Down
- 1. 11, addition of hydrogen in ehtylene.
- 2. 9, Wasting away of mental
- 3. 12, copper reacts with silver nitrate to form blue coloured copper sulphate and shiny
- 4. 10, Reaction in which heat is evolved.
- 5. 9, Nitrogen gas is filled in packets of chips to prevent this.
- 6. 5, Copper oxide reacts with hydrogen to form reddish brown copper and water.