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